service manual
TRANSCRIPT
ProgrammableFrequency CounterPM6685 & PM6685R
Service Manual
4822 872 20106
First Edition (May 2003)
No part of this manual may be copied without the express permission of the copyright owner.
All product names are trademarks of their respective companies.
2003 Pendulum Instruments AB
All rights reserved. Printed in Sweden.
This is a complementary service manual covering instruments with manufacturing numbers exceeding 840684. The principaldifferences are to be found in Chapter 7 and in Chapter 8 due to a major redesign of the main PCB.
Do not dispose of the previous edition, identified by the part number, 4822 872 25012, and the publishing date, June 1996.
You may have to refer to it for information on older instruments as well as options not mentioned here.
Contents
1 Safety Instructions
2 Performance Check
General Information . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Recommended Test Equipment . . . . . . . . . . . . . . . . 2-2
Front Panel Controls . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Short Form Specification Test . . . . . . . . . . . . . . . . . . 2-3
Rear Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Measuring Functions . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
3 Disassembly
Removing the Cover . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Reinstalling the Cover . . . . . . . . . . . . . . . . . . . . . . . . 3-2
PM9624 (HF Input) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
PM9626B (GPIB Interface) . . . . . . . . . . . . . . . . . . . . 3-3
PM9691 or PM9692 (Oven Oscillator) . . . . . . . . . . . 3-3
4 Circuit Descriptions
Block Diagram Description . . . . . . . . . . . . . . . . . . . . 4-2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Hardware Functional Description . . . . . . . . . . . . . . . 4-4
Front Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Rear Panel Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Optional Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Software Functional Description . . . . . . . . . . . . . . 4-15
Test Routines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
5 Repair
Preventive Maintenance. . . . . . . . . . . . . . . . . . . . . . . 5-2
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
When to Replace the Fan
(PM6685R only ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Safety Inspection and Test After Repair . . . . . . . . . 5-9
General Directives. . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
6 Calibration Adjustments
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Input Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Reference Oscillators . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Other Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
7 Replacement Parts
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Mechanical Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
Front Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12
GPIB Interface (PM9626B) . . . . . . . . . . . . . . . . . . . 7-13
8 Drawings & Diagrams
How to read the diagrams. . . . . . . . . . . . . . . . . . . . . 8-2
9 Appendix
How to Replace Surface Mounted Devices. . . . . . . . 9-2
Electrostatic discharge . . . . . . . . . . . . . . . . . . . . . . . 9-3
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-4
Power Supply Switchmode Module . . . . . . . . . . . . . 9-5
Circuit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6
Calibration Adjustments . . . . . . . . . . . . . . . . . . . . . . 9-7
Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . 9-8
PM6685R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12
Performance Check . . . . . . . . . . . . . . . . . . . . . . . . 9-12
Functional Description. . . . . . . . . . . . . . . . . . . . . . . 9-12
Calibration Adjustments . . . . . . . . . . . . . . . . . . . . . 9-13
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . 9-14
This page is intentionally left blank.
Chapter 1
Safety Instructions
WARNING: These servicing instructions are for use
by qualified personnel only. To reduce the risk of
electric shock, do not perform any servicing other
than that specified in the Operating Manual unless
you are fully qualified to do so.
Authorized service and calibration of this instrument is available
through your Fluke representative. See address at the end of this
manual.
Read this chapter carefully before you check, adjust, or repair an in-
strument.
Caution and Warning Statements
You will find specific warning and caution statements where neces-
sary throughout the manual.
CAUTION: Indicates where incorrect operating proce-dures can cause damage to, or destruction of,
equipment or other property.
WARNING: Indicates a potential danger that requires
correct procedures or practices in order to prevent
personal injury.
This Timer/Counter has been designed and tested in accordance with
safety class 1 requirements for Electronic Measuring Apparatus of
IEC (CENELEC) publication EN61010-1, and CSA 22.2
No. 1010-1, and has been supplied in a safe condition.
This manual contains information and warnings that should be fol-
lowed by the user and the service technician to ensure safe operation
and repair in order to keep the instrument in a safe condition.
WARNING: Opening instrument covers or removing
parts, except those to which access can be gained
by hand, is likely to expose high voltages which
can cause death.
The instrument must be disconnected from all voltage sources before
it is opened. Remember that the capacitors inside the instrument re-
tain their charge even if the instrument has been disconnected from
all voltage sources.
Grounding
This instrument is connected to ground via a sealed three-core power
cable, which must be plugged into socket outlets with protective
ground contacts. No other method of grounding is permitted for this
instrument.
The ground symbol on the rear panel indicates where the
protective ground lead is connected inside the instrument.
Never remove or loosen this screw.
When the instrument is brought from a cold to a warm environment,
condensation may cause hazardous conditions. Therefore, ensure
that the grounding requirements are strictly met.
Power extension cables must always have a protective ground con-
ductor.
Indicates that the operator should consult the manual.
WARNING: Any interruption of the protective ground
conductor inside or outside the instrument, or dis-connection of the protec- tive ground terminal, is
likely to make the instrument dangerous. Do not in-
tentionally disrupt the protective grounding.
Disposal of Hazardous Materials
WARNING: Disposal of lithium batteries requires spe-
cial attention. Do not expose the batteries to heat
or put them under extensive pressure. These mea-
sures may cause the batteries to explode.
A lithium battery is used to power the nonvolatile RAM in this in-
strument. Our world suffers from pollution, so don’t throw batteries
into your wastebasket. Return used batteries to your supplier or to the
Fluke representative in your country.
Line Voltage
The instrument can be powered by any voltage between 90 and
265 VAC without range switching. This makes it suitable for all nom-
inal line voltages between 100 and 240 V.
Replacing Components in Primary Circuits
Components that are important for the safety of this instrument may
only be replaced by components obtained from your local Fluke
representative. After exchange of the primary circuits, perform the
safety inspection and tests, as described in Chapter 5, “Repair”.
Fuses
This instrument is protected by an ordinary 1.6 A slow blow fuse
mounted inside the instrument. NEVER replace this fuse without
first examining the Power Supply Unit.
1-2 Safety Instructions,
Chapter 2
Performance Check
General Information
WARNING: Before turning on the instrument, ensure
that it has been installed in accordance with the In-
stallation Instructions outlined in Chapter 3 of the
Operators Manual.
This performance procedure is intended to:
– Check the instrument’s specification.
– Be used for incoming inspection to determine the acceptability
of newly purchased instruments and recently recalibrated in-
struments.
– Check the necessity of recalibration after the specified
recalibration intervals.
NOTE: The procedure does not check every facet of the in-strument’s calibration; rather, it is concerned primarily
with those parts of the instrument which are essential
for determining the function of the instrument.
It is not necessary to remove the cover of the instrument to perform
this procedure.
If the test is started less than 20 minutes after turning on the instru-
ment, results may be out of specification, due to insufficient
warm-up time.
Recommended TestEquipment
*) Two of the cables must have 10 ns difference in delay, for ex-
ample: 5 ns and 15 ns.
Preparations
Power up your instruments at least 20 minutes be-fore beginning the tests to let them reach normal
operating temperature. Failure to do so may result
in certain test steps not meeting equipment specifi-cations.
Front Panel Controls
Power-On Test
At power-on the counter performs an automatic self-test of the fol-
lowing:
– Microprocessor
– RAM
– ROM
– Measuring circuits
– Display
If a GPIB interface is installed, the GPIB address is displayed.
If there are any test failures, an error message is shown.
– Turn on the counter and check that all segments light up on the
display and that no error message appears.
Internal Self-Tests
The different built-in test routines invoked by the power-on test can
also be activated from the front panel as follows:
– Enter the Auxiliary Menu by pressing AUX MENU.
– Select the test submenu by pressing DATA ENTRY up or
down.
– Enter the test menu by pressing the ENTER key.
Selections for internal self-tests are:
1 TEST ALL (Test 2 to 5 in sequence)
2 TEST RO (ROM)
3 TEST RA (RAM)
4 TEST LOGIC (Measuring Logic)
5 TEST DISP (Display Test)
– Use DATA ENTRY up/down to select TEST ALL, then press
ENTER.
– If any fault is detected, an error message appears on the dis-
play and the program halts.
– If no faults are detected, the program returns to measuring
mode.
2-2 Performance Check, General Information
Type of instru-
ment
Required
Specifications
Suggested
Equipment
LF Synthesizer Square;
Sine up to 10 MHz
Power Splitter 50 PM9584/02
T-piece
Termination 50 PM9585
Reference oscilla-tor
10 MHz ±0.1 Hz forstandard oscillator
Fluke counter withcalibrated option
PM9691
10 MHz ±0.01 Hz for
PM9691 & PM9692
Fluke PM6685R or
PM6681R
10 MHz ±0.0001 Hz
for PM6685R
Fluke 910R or Ce-
sium Standard
HF signal genera-
tor
0.5 GHz (no presc.)
3.3 GHz (option 10)
Pulse Generator 125 MHz
Oscilloscope with
probes
350 MHz
BNC cables 5 to 7 cables *
Table 2-1 Recommended Test Equipment.
Ω
Fig. 2-1 Text on the display.
Keyboard Test
The keyboard test verifies that the counter responds when you press
any key. To check the function behind the keys, see the tests further
on in this chapter.
Press the keys as described in the left column and look on the display
for the text, as described in the second column. Some keys change
more text on the display than described here. The display text men-tioned here is the text mainly associated with the selected key.
NOTE: For the instrument to respond correctly, this test must
be carried out in sequence and you must start with the
preset (power-on) setting.
* The LSD may vary.
** MENU is not disabled by setting DEFAULT; press menu again.
Short Form SpecificationTest
Sensitivity and Frequency Range
– Press the PRESET key to set the counter in the default setting.
Then confirm by pressing ENTER.
– Turn off AUTO.
– Select IMP A = 50 and maximum sensitivity.
– Connect a signal from a HF generator to a BNC power splitter.
– Connect the power splitter to your counter and an oscilloscope.
– Set input impedance to 50 on the oscilloscope.
– Adjust the amplitude according to the following table. Read
the level on the oscilloscope. The counter should display the
correct frequency.
Reference Oscillators
X-tal oscillators are affected by a number of external conditions,
such as ambient temperature and supply voltage, but they are also af-
fected by aging. Therefore, it is hard to give limits for the allowed
frequency deviation. You must decide the limits depending on your
application, and recalibrate the oscillator accordingly. See the Pre-
ventive Maintenance in the Repair chapter, Chapter 5.
To check the accuracy of the oscillator you must have a calibrated
reference signal that is at least five times as stable as the oscillator
that you are testing, see the following table.
– Press the PRESET key, then press the ENTER key to set your
counter in the Default setting.
Performance Check, Short Form Specification Test 2-3
Key(s) Display Note Pass
/Fail
STAND-BY Display Off Red LEDbeside
the key
On
ON Backlight on
PRESET
ENTER
DEFAULT?
NO SIGNAL
Default
setting
EXT REF EXT REF
Input A
FILTER FILTER
50 50
(2 times)
SENS
(2 times)
Bar graph:
SENS
(2 times)
Bar graph:
AUTO AUTO TRIG
Other
PRESET
ENTER
DEFAULT?NO SIGNAL
Defaultsetting
MEAS TIME 200–3
s
DATA ENTRY 500–3
s
DATA ENTRY 200–3
s
ENTER NO SIGNAL
DISPLAY HOLD HOLD
DISPLAY HOLD
SINGLE SINGLE
FUNCTION DUTY F A
FUNCTION TOT A MAN
FUNCTION DUTY F A
FUNCTION FREQ A
AUX MENU RECALL
MEAS RESTART NO SIGNAL
PRESET
ENTER
DEFAULT?
NO SIGNAL
Default
setting
CHECK 10.000000006Hz* Start
counting
NULL NULL
NULL 10.000000006Hz*
BLANK DIGITS
(3 times)
10.00000 6Hz*
MENU Displays all avail-able functions, pro-
cesses and input
controls. Selecteditems are blinking.
Table 2-2 Keyboard Test.
Frequency Level Pass/Fail
MHz mVPP mVRMS dBm Input A
1 30 10 –27
25 30 10 –27
50 30 10 –27
150 60 20 –21
200 90 30 –17
250 150 50 -13
300 150 50 -13
Table 2-3 Sensitivity of input A at various frequencies.
Oscillator Max. tempera-
ture dependence
Max. aging
per month
Max. aging
per year
Standard ±100 Hz ±5 Hz ±50 Hz
PM9691 ±0.05 Hz ±0.1 Hz ±0.75 Hz
PM9692 ±0.025 Hz ±0.03 Hz ±0.2
Rubidium ±0.003 Hz ±0.0005 Hz ±0.002 Hz
Table 2-4 Deviation (for PM9691 and PM9692 after a
warm-up period of 48 hours).
– Connect the reference to input A.
– Check the readout against the accuracy requirements of your
application.
Acceptance Test
As an acceptance test, the following table gives a worst case figure
after a 30 minute warm up time. All deviations that can occur in a
year are added together.
Acceptance Test, PM6685R
To fully test the accuracy of the PM6685R, a reference signal of ex-
tremely high stability is needed. Examples of such references are
Cesium Atomic references, or transmitted signals from a nationally
or internationally traceable source, like the GPS satellites.
Recommended Test Equipment
Type Stability Model
10 MHz refer-
ence
1x10-10
910R with satellite contact dur-
ing the last 72 hours.
Test Procedure
– Connect the counter to the line power.
– Check that the UNLOCK indicator turns on, and then turns off
again within 6 minutes after connecting line power.
– Connect the 10 MHz reference signal to input A of the counter.
– Select FREQUENCY A measurement.
– Select 2 s measuring time.
– Check that the displayed frequency is 10.00000000 MHz
±0.05 Hz 10 minutes after connection to line power.
Rear Input/Output
INT REF Output
– Connect an oscilloscope to the 10 MHz output on the rear of
the counter. Use coaxial cable and 50 termination.
– The output voltage is sinusoidal and should be above 2.8 VPP.
EXT REF Input
– Press the PRESET key, then press the ENTER key to set your
counter in the Default setting.
– Apply 10 MHz sine to input A equipped with a T-piece and to
Ext Ref input at the rear, terminated with 50 . Amplitude on
10 MHz signal; 200 mVRMS, (560 mVPP)
– Press the Ext Ref key.
– The display should show 10.000000006 Hz ± 5 LSD.
EXT ARM INPUT
– Press the PRESET key, then press the ENTER key to set your
counter in the Default setting.
– Select 50 input impedance.
– Apply 10 MHz 500 mVRMS, (1.4 VPP) sine to input A
– The counter measures and displays 10 MHz.
– Press the AUX MENU key.
– Press the DATA ENTRY UP/DOWN keys until the display
shows ‘Ar. Start’, confirm by pressing the ENTER key.
– Press DATA ENTRY UP/DOWN keys until the display shows
‘POS’, confirm by pressing the ENTER key.
– Press the ENTER key once more.
– The counter does not measure.
– Connect a pulse generator to Ext Arm input.
– Settings for pulse generator: single shot pulse, amplitude TTL
= 0 - 2 VPP, and duration = 10 ns.
– Apply one single pulse to Ext Arm input.
– The counter measures once and shows 10 MHz on the display.
Measuring Functions
Preparation for Check of Measuring Function is as follows:
– Connect a 10 MHz sine wave signal with 2.0 VPP amplitude
via a T-piece to Input A.
– Connect a cable from the T-piece to Input E (Ext Arm) at the
rear.
– Select the measuring function as in the ‘Selected Function’ col-
umn and check that the counter performs the correct measure-
ment by displaying the result as shown under the “Display”
column in the following table.
1) Value depends on the symmetry of the signal.
2) Exact value depends on the input signal.
2-4 Performance Check, Rear Input/Output
Oscillator Frequency readout Suitable refer-
ence
Pass
/Fail
Standard 10.00000000 MHz±120 Hz
PM9691
PM9691 10.00000000 MHz±1 Hz PM6685R
PM6681RPM9692 10.00000000 MHz±0.25 Hz
Table 2-5 Acceptance test for oscillators.
Selected Function Display Pass/ Fail
PRESET
ENTER
DEFAULT?
10 MHz2)
IMP A 50 10 MHz 2)
Non AUTO 10 MHz2)
PER A 100 ns2)
RATIO A/E 1.0000000
PWIDTH A 50 ns1)
TOT A MAN
DISPLAY HOLD Start counting
DISPLAY HOLD Stop counting
DUTY FACT 0.500000 1)
AUTO 0.5000001)
Table 2-6 Measuring functions check.
Options
Prescaler
This extra HF input (PM9624) is easily recognized by its front panel
connector (Input C, type N).
– Connect the output of the signal generator to the HF input of
the counter.
– Connect the 10 MHz REFERENCE OUT of the generator to
the REFERENCE IN at the rear panel of the counter.
Setting for the counter after Preset.
– Function = FREQ C.
– EXT REF.
Generate a sine wave in accordance with the following table.
– Verify that the counter counts correctly. (The last digit will be
unstable).
Performance Check, Options 2-5
Frequency Amplitude Pass/Fail
MHz mVRMS dBm
100-300 20 –21
-2500 10 –27
-2700 20 –21
-3000 100 –7
Table 2-7 Sensitivity of the PM9624 HF input.
EX TRE F
Fig 2-2 Connect the output of the signal generator to the HFinput of the counter.
Required Test Equipment Suggested Specification
HF signal generator 3.3 GHz
Table 2-8 Test equipment for 3.0 GHz HF input.
This page is intentionally left blank.
2-6 Performance Check, Options
Chapter 3
Disassembly
The terms in the following figure are used in all descriptions in this
manual.
The PM6685 is available with a number of options and accessories.
The labels on the rear panel of the counter identify the options and
accessories included. If there are no labels, the counter contains an
uncompensated crystal oscillator and no options. The following la-
bels exist:
– PM9624 3.0 GHz HF input
– PM9691 High-Stability Oven Oscillator
– PM9692 Ultra-High-Stability Oven Oscillator
– PM9626B GPIB Interface
The location of these optional parts is illustrated in Fig.3-2.
Removing the Cover
WARNING: Do not perform any internal service or ad-justment of this instrument unless you are qualified
to do so.
WARNING: When you remove the cover you will ex-
pose high voltage parts and accessible terminals
which can cause death.
WARNING: Although the power switch is in the off
position, line voltage is present on the printed cir-cuit board. Use extreme caution.
WARNING: Capacitors inside the instrument can hold
their charge even if the instrument has been sepa-rated from all voltage sources.
– Make sure the power cord is disconnected from the counter.
– Turn the counter upside down.
– Loosen the two screws (A) at the bottom and the two screws
(B) in the rear feet.
– Grip the front panel and gently push at the rear.
– Pull the counter out of the cover.
Reinstalling the Cover
– Gently push the counter back into the cover.
– Turn it upside down.
– Install the two screws (A) at the bottom.
– Install the two rear feet with the screws (B) to the rear panel.
PM9624 (HF Input)
– Disconnect the power cable.
– Remove the cover from the counter.
– Disconnect the cable from the mini-coax connector (A) on the
HF input.
– Press the clips (B) apart and lift the HF input pca straight up
and out.
3-2 Disassembly, Removing the Cover
Top
Left
Right
Front Bottom
Rear
Fig. 3-1 Designations used in this manual.
G 1
Main board
Front panel
PowerModule
GPIB interface
Optionaloscillator
HF input
Fig. 3-2 Location of the boards in the counter.
A
B
A
B
Fig. 3-3 Remove the screws and push the counter out of
the cover.
– When installing the HF input, make sure that the connector
pins fit exactly in the holes in the connector housing (C).
PM9626 (GPIB Interface)
– Disconnect the power cable.
– Remove the cover from the counter.
– Loosen the two screws (A) holding the GPIB interface to the
rear panel.
– Disconnect the interface cable from P103.
– Move the GPIB interface pca toward the front of the counter
and lift the pca supports out from the “keyholes” (B) on the
main PCA.
PM9691 or PM9692 (OvenOscillator)
– Disconnect the power cable.
– Remove the cover of the counter.
– Remove the two screws (A) holding the oscillator to the main
pca from underneath.
– Press the clip (B) gently to the front of the counter and lift the
oscillator straight up.
– Make sure that jumpers J14 and J15 are set in the correct posi-
tion.
– When fitting the oscillator, make sure that the connector pins
fit exactly in the holes in the connector housing.
Disassembly, PM9626 (GPIB Interface) 3-3
B
A
B
A
Fig. 3-4 Loosen the two screws in the rear panel and dis-engage the board from the keyholes.
A
Fig. 3-5 One of the two screws holding the oven oscillatorin place.
A
B
BC
Fig. 3-6 Removing the HF Input.
This page is intentionally left blank.
3-4 Disassembly, PM9691 or PM9692 (Oven Oscillator)
Chapter 4
Circuit Descriptions
Block Diagram Description
General
The PM6685 Frequency Counter consists of three main units:
– Front unit
– Main board unit
– Rear panel unit
The following options can be added:
– GPIB interface including analog output (PM9626B)
– Prescalers 1.3 GHz (PM9621), 3.0 GHz (PM9624)
– Oven-controlled crystal oscillators (PM9691 or PM9692)
– Rack mount adapter (PM9622/02)
– Battery option (PM9623)
The chassis of the counter consists of a front piece molded in alumi-
num, an aluminum rear panel, and two profiled aluminum rods that
hold the front and rear panels together. This unit can be slid into the
aluminum cover of the instrument.
The front unit contains all functions needed for the user communica-
tion. It is connected to the main board unit with a flat cable, and the
molded front unit is fixed to the two profiled aluminum rods with
screws.
The main board unit consists of a PCB mounted on two profiled alu-
minum rods. Most functions, such as the following, are placed on the
main board:
– Input amplifiers with trigger level circuits
– Power supply
– Measurement logic
– Microcomputer circuitry
Some outputs, such as the trigger levels and probe compensation
view outputs are directly mounted on the main board.
The rear panel unit is of aluminum with a number of mounted con-
nectors. Most of the connectors are soldered directly to the main
board. The rear panel is fixed to the two profiled aluminum rods with
screws.
4-2 Block Diagram Description
Block Diagram Description 4-3
Local preset
Optional oscillator
External arming
External reference
HF input
Input Amplifier
Reset circuit
Power supply90-265 V
Micro-computer
CounterASIC
10 MHz out
Gate LED
Display
Analog output
GPIB option
Keyboard
+7V
+5V
-5.2V
AC
I C2
PWM
E
C
D
A
G
RESET
U11
HSI.0
X2EXTCB2EXTREFA
A2
U29
GET
Trigger DAC´s
INTREF
÷2
+12V
Option 80
Fig. 4-1 PM6685 block diagram.
Hardware Functional Description
Front Unit
LCD Drivers
An LCD and two LEDs are used as indicators. The LCD is used to
show both the measurement result and the state indicators of the in-
strument setting. The LEDs show standby and gating.
The LCD has 158 segments that are multiplexed with a ratio of 2:1.
Two parallel and synchronized LCD drivers (U201 and U202) are
used. They are connected with a serial I2C bus to the microcomputer
on the main board. The clock frequency of the drivers is approxi-
mately 140 kHz, set by R201. The VLCD pin is connected to GND
on the main board.
The LCD is provided with a backlight, an LED array integrated into
one component. Its current consumption is set by the resistors
R204-R207. The backlight dissipates approximately 1.5 W .
Keyboard
The front panel pushbuttons are connected in a matrix. The scanning
signals H0 to H3 come from the main board. If a push button is
pressed and H0 to H3 is high, one of the output signals V0 to V7 will
be high. The STAND-BY/ON and LOCAL-PRESET buttons are not
part of the scanning but are connected directly to the main board.
The front unit is fixed to the main board unit with three screws. The
electrical connection is made with a 40-lead flat cable to the main
board.
4-4 Hardware Functional Description
U2 02
Dr iver 2
PC F 8576
LCD
U 20 1Dr iver 1
PC F8 576
Sync .
SCL
SD A
Backpl. 0
Backpl. 1
2:1 Multiplex
1 58 segment s
Fig. 4-2 Front panel LCD drivers.
V0-V7
AD0-AD7 H0-H3
AD
0-A
D7
U11
U13A
U14A
LOCAL/PRESET
SDASCL
Main Board Keyboard & DisplayBoard
CPU
HS
1.0
P1
.0P
1.1
Latch
Latch
Fig. 3 Keyboard scanning.
Main Board
Introduction
Components not necessary for explaining the function are omitted
from the figures in this chapter. For the complete set of components,
see the circuit diagrams in Chapter 8, Drawings and Diagrams.
Input Amplifier
The input amplifier has 300 MHz bandwidth and is of the split-band
type. It contains four main stages: the signal adaptation stage, the im-
pedance converter stage, the comparator stage, and the buffer stage.
Signal Adaptation
This part of the amplifier contains:
– 50 /1 M impedance selector
– x1/x11 attenuator
– Voltage limiter
50 / 1 M Impedance Selector
The 50 or 1 M impedance modes are selected by relay K1. 50 is selected via the resistors R7 to R17, if the relay is closed. 1 M is
selected if the relay is open. Depending on selected attenuation, the
1 M input impedance is determined by different combinations of
resistors.
In x1 attenuation mode (K2 is closed and K3 is open) the impedance
is determined by resistor network R22 to R28.
In x11 attenuation mode (K2 is open and K3 is closed) the same net-work as in the x1 case is involved plus the resistors R3 to R5 and R18
to R20.
The input capacitance in parallel with 1 M is 24 pF at x1 attenua-tion and 12 pF at x11 attenuation.
The series resistor R1 immediately after the selector serves both as
current limiter together with the voltage limiter (see below) and as
impedance matching resistor. The resistor also improves the Volt-age-Standing-Wave-Ratio (VSWR) of the amplifier input.
x1/x11 Attenuator
The x1 attenuator consists of a resistive low-frequency divider,
which reduces the input signal by a factor of 2, and a capacitive
high-frequency divider. The attenuator is formed by the resistors
R22-R23 and R24-R26 in parallel with R27-R28. The capacitive part
is formed by the variable capacitor C2 in parallel with R22-R23, and
the parasitic capacitance across R24-R26.
The capacitive attenuator is adjusted via variable capacitor C2 to the
same attenuation value as the resistive attenuator.
The x11 attenuator also consists of a resistive low-frequency divider
and a capacitive high-frequency divider. The resistive part is formed
by R1-R5, and R18-R20 in parallel with 1 M (the x1 attenuator im-
pedance). The capacitive divider is formed by the variable capacitor
C1 and the parasitic capacitance at the node where R5, R18 and R22
meet.
Resistors R2 and R6 improve the frequency response.
Hardware Functional Description 4-5
K 1
K2
K3
R6
J 1 C3R1 R2 R3-R5
R19-R20
R18
C2
R24-R26
R22-R23
To V olt age
li mi ter
R7-R17
C1
R27-R28
Fig. 4-4 Impedance selector and 1X/11X attenuator.
Imp. Att. LimiterImp.
Conv. Comp-
arator
Input AA
LPfilter
Trigger
level Comp I
Comp-
arator
Trigger
level Comp II
BufferFlip-
Flop
Buffer÷2 A2
Fig. 4-5 Input amplifier block diagram.
Voltage limiter
A voltage limiter that protects the impedance converter against
overvoltage is placed between the attenuator and the impedance con-verter. The voltage limiter consists of resistor R35 and the diodes D1
and D3 to clamp positive voltage and resistor R36 plus the diodes D2
and D4 to clamp negative voltage. The clamp voltage is approxi-mately ±2.1 V for low frequency signals. At high frequency the
clamp voltage rises to approximately ±2.3 V.
Impedance Converter Stage
The analog signal from the input stage is fed to an amplifier stage
where split-band technique is used to get good frequency response
over a wide range. This means that the high-frequency contents of
the signal are fed to a high-impedance AC-coupled FET transistor
stage Q1. The low-frequency contents are fed to a DC-coupled oper-
ational amplifier stage with negative feedback from the output of the
converter stage buffer. The low-frequency path handles frequencies
up to approximately 5 kHz.
The high-frequency signal is fed to the gate of Q1. The high imped-
ance at the gate is converted to a low impedance at the source. The
source is connected to the base of HF transistor Q2, the summing
point for the two signal paths.
To make the FET work well in its active region within the whole dy-
namic range, the FET drain is supplied with +7 V via resistor R42.
The low-frequency signal is divided by the two resistors R27 and
R28 before it is coupled to the input pin #2 of the operational ampli-
fier U1. The resistors R37 and R38 at the operational amplifier out-
put pin #6 center the output swing, and capacitor C6 stabilizes the
operational amplifier stage.
The low-frequency path goes from the operational amplifier to the
base of transistor Q3, the collector of which is connected to the base
4-6 Hardware Functional Description
R35
D3D1
D4D2
R36
+5
-5.2
From
Attenuator
To Impedance
converter stage
Fig. 4-6 Voltage limiter.
Tr ig
L e ve l
+
-
Q1
Q3
Q13
Q4U1
U8
C6
L1
K4
R31
R27
R28
R33
R37
R3
2
R38
R50
R29-R30
- 5 .2 - 5. 2 -5 .2 -5 . 2 -5 . 2
+ 7 + 5
-5 . 2
Fr om Pro t ec t io nci rcu it s
R106
C18-C19
+ 5
Q2
T o
Fli p- Fl o p+
-
R42 R43
R105
C20
C13
R46
R47
K4C5
Fig. 4-7 Impedance converter.
of transistor Q2. This point is common to the high and low frequency
paths.
A buffer amplifier with high driving capacity is used to get a linear
output in the 100 load resistor R106 over a swing of 2 V. This am-plifier consists of a driver stage Q2, an output stage Q13, and a cur-rent generator Q4.
From the output of this second amplifier stage, the signal is fed back
to the op amp pin 3 via the divider chain R29 to R32. The trimmer po-tentiometer R31 sets the gain of the low-frequency path equal to the
high-frequency gain of about 0.9. Capacitor C5 is connected to oper-ational amplifier pins #1 and #8 to achieve stable operation. The
trimmer potentiometer R33 between pins #1 and #5 on the opera-tional amplifier is used for adjusting the offset voltage of the opera-tional amplifier.
The channel A filter connected to the output of the second amplifier
stage is a 100 kHz low-pass LC filter. It consists of the coil L1 and the
two capacitors C18 and C19 in parallel. The filter is controlled by the
relay K4. The filter output is connected to the input of the comparator
stage.
Comparator Stage
The comparator stage converts the analog signal from the impedance
converter stage to a square wave. This circuit consists mainly of the
high-speed integrated comparators U8A and U8B plus a separate
trigger level circuit connected to the comparators at pins 9 and 13 via
resistors R87 and R88.
The trigger level circuits, which are described later, generate a DC
level in the range of approximately æ1.6 V. This covers a dynamic
range of 6.4 V since the input signal is divided by a factor of 2 before
it reaches the comparator.
The counter is provided with adjustable hysteresis, i.e., it is control-lable via the front panel or GPIB. The circuitry for setting the hyster-esis consists of the resistor network R91 to R96, supplied with +5 V
and –5.2 V. It is connected to the latch enable inputs of the compara-tor, pin 5 and 7 for Comparator I and pin 17 and 15 for Comparator II.
The input signal is fed to both comparators, the outputs of which are
used for setting/resetting the Flip-Flop U9.
Buffer Stage
Before the signal is fed further into the ASIC U29, it has to be
level-shifted by a buffer stage. The negative ECL logic levels
(~ –0.9 V to ~ –1.7 V) from U9 pins 17 and 18, are converted to a
single-ended signal with CMOS logic levels ( ~ 5 V to ~ 0 V).
The buffer is a differential amplifier consisting of the two transistors
Q32 and Q33 whose bases are fed differentially from the two com-
parator outputs. Resistor R304 serves as a current generator that is
switched alternately to the two collector resistors R296 and R297.
Trigger Level Circuits
The trigger level circuits generate the trigger voltage levels to the in-
put comparators. The trigger level range is –3.2 V to + 3.2 V with a
maximum resolution of 0.6 mV. The input amplifier attenuation is
Hardware Functional Description 4-7
U8A
U9
U9
U8B
- 5.2
+5
Q32 Q33
R2
97
R2
96
T o
C ou nter
c ir cu itsF lip -
F lo p
+ 5
- 5.2
R9
3R
94
T rig ger Level I
Tri gger Level I I
Input si gnal
A
B
C
D
E
F
G
A
B
C
D
E
G
F
F
R9
1
R92
R96
R87
R88
TP27 TP26
+
-
+
-
R3
04
Fig. 4-8 Comparator flip-flop and buffer stages.
approximately 2 times. The trigger level circuits generate a DC level
that has the same attenuation. This means that the output of this cir-cuit has a range of –1.6 V to +1.6 V with a resolution of maximum
0.3 mV. A dual 8-bit DAC is used. The DACs only generate voltages
between 0 and +1.6 V, but by using a X2 amplifier and an offset shift
of 50%, the voltage range of –1.6 V to +1.6 V is achieved. The supply
voltages to the trigger level circuits are filtered by R and C to prevent
noise originating in the digital circuitry from influencing the trigger
levels. The ground plane under the trigger level circuits is separated
from the rest of the ground plane, and the planes are connected only
at the front of the counter.
The trigger level circuits consist of the following:
– Resistor network R57 to R68 for generating the reference volt-
ages 0.04 V, 0.22 V, 0.59 V, and 1.6 V.
– Three multiplexers (U3) to select one of the levels. With this
arrangement there is a total trigger level range of
–1.6 V to +1.6 V.
– A double DAC (U4).
– Two current-to-voltage converters U6. These circuits convert
the current at the IOUT pins of the DACs to a voltage. This
signal has a range of 0 V to approximately 1.6 V.
– Two amplifiers, U7, with an amplification of X2, to generate a
signal with a range of 0 V to 3.2 V. Resistors R69 and R70 set
the reference voltage to the amplifier to get the 50 % offset
shift. To get exact voltages, 0.5 % precision resistors are used:
R73-R75, R78-R79 and R80-R82, R85-R86.
– The zero adjust of the trigger levels is done with trimmer po-
tentiometers R69 and R70 connected to the amplifiers in U7.
– Two low-pass filters R87-C29 and R88-C30.
4-8 Hardware Functional Description
- 5.2
+ 5
V RE F R F B
IOUT
D0- D7
+ DA CA
V RE F R F B
IOUT
U4
U6
U3
R88
U7
R69
Tr ig ger l evel C omp I
A D0-A D2AD0- A D8
- 5.2
+ 5
R85-R86
R82 U7
R70
1 . 6V0 .59V0 .22V0 .04V
R87
R78-R79
Tr ig ger l evel
Comp I I
C om par ator I
C omp ara to r I I
R75
R73-R74
R80-R81
C29
C30
U6
Fig. 4-9 Trigger level circuits.
Power Supply
General survey
The power supply generates four regulated DC supply voltages to the
counter, as well as some other supply voltages for special purposes.
The power supply block also contains the ON/STANDBY logic.
The main building block of the power supply is a primary switch
mode power module (U39). The line power AC voltage (90 V to
265 V) is rectified to a DC voltage before it is fed to the power mod-
ule.
After a line power filter in the power inlet, a fuse of 1.6 AT and an
NTC resistor protect the power supply. The fuse F1 should only blow
if a catastrophic error occurs on the primary side of the power supply.
A short-circuit on the secondary side should not affect the primary
side. To minimize the inrush current to the capacitors at the connec-
tion of the power cord, an NTC resistor (R148) is used. The resis-
tance is 15 when the resistor is cold but decreases to a few ohms as
it is warmed up by the steady-state current.
The AC voltage is rectified in the bridge rectifier D9 and filtered in
C64. C65 suppresses noise from D9. L6 and C82-C83 serve as a fil-ter at the input of U39.
All inputs and outputs of the power module have HF chokes. The
module is mounted with distance washers on the main board.
From the module there are three DC voltages outputs. One of those is
regulated (+ 5 V) and the others are unregulated. These voltages will
vary with input line voltage, the current at + 5 V, and at the unregu-lated voltages. The output marked +15 will be approximately +18 V,
and the output marked –7 will be approximately –8 V. The outputs
are filtered; HF is filtered by C70-C73, and LF is filtered by L7-L9
and C74-C76.
Hardware Functional Description 4-9
U
U U +7 V
+12 V
+12 V*
+5 V
-5.2 V
FanPM6685R
only
On
M
Filt
er&
Fu
se
Po
we
rM
od
ule
ain
sIn
let
Stand by
U40B
D9
U39
+15
+5
-7
U43
U41
*) for ON/STBY control & OCXO
U21A&Q17
Q14
K5
U42
J31
K5
R1
30
-R1
45
U
R1
49
-R1
55 J15
R156
+-
Q5-Q6
Fig. 4-10 Power Supply.
Function
The three DC voltages from the power module are used for
generating the following four supply voltages in the counter:
+5 V
Regulated +5 V from the power module is used directly.
–5.2 V
–7 V is used, with regulator U43.
+12 V
+15 V is used, with regulator U41.
+7 V
Stabilized +12 V is used, with regulator U21A and Q17.
The following supply voltage is used for a special purpose:
+12 V*
This voltage comes directly from the +12 V regulator U41and will be
present as soon as the power cord is connected, regardless of the po-
sition of the ON/STANDBY switch. It is used for the ON/STANDBY
control logic and for supplying an optional OCXO in STANDBY to
avoid the long warm-up time otherwise needed to obtain maximum
accuracy.
At stand-by, the four main supply voltages are switched off, but as
described above, some parts of the instrument should not be
diconnected. Therefore the power module will never be switched off.
The PM6685 has consequently only a secondary power switch.
A relay (K5) disconnects the load on the +5 V and –5.2 V at stand-by.
Because the power module must always have a load on the regulated
voltage, seven bleeder resistors R149-R155 are always connected to
+5 V via J15. At stand-by the counter only needs +15 V, so a dummy
load consisting of R130-R145 is connected to the power module by
means of the relay K5 in order to stabilize the operation of the
switchmode converter.
+5 V controls the switching on/off of +12 V and +7 V. When +5 V is
on, Q6 and Q5 will conduct, i.e. +12 V will be on. If there is no +5 V,
Q6 and Q5 will be off, thus blocking the +12 V.
The ON/STANDBY logic controls relay K5, which operates as de-
scribed above. It is also possible to open the relay by changing the
position of J16.
The ON/STANDBY logic consists of the RS (set-reset) flip-flop
U40B that is controlled by the ON/STANDBY button on the front
panel. Pressing STANDBY will apply a high voltage (+12 V) to the
set input. The inverting output of the flip-flop will be low, discon-
necting K5 via Q14. Pressing ON will give a high voltage (+12 V) on
the reset input. The inverting output of the flip-flop will be high,
engaging K5. Inserting the power cord into the power inlet will cause
a pulse on the reset input, via C35. The microcomputer can disable
the ON/STAND-BY button via Q12 and Q7. This is done in remote
mode and during RAM-testing. A high level on the base of Q12 en-
ables STAND-BY, a low level disables it.
The STAND-BY indicator on the front panel is controlled by the
+5 V via Q16. +5 V off lights the STAND-BY LED that is fed by the
uninterruptible +12 V*.
+5 V also indirectly controls the fan in the PM6685R. It is a 12 V DC
fan that operates only if +12 V is on. An NTC resistor, serving as a
temperature sensor, controls the speed by applying a variable refer-ence voltage to the fan voltage regulator U42.
Counter ASIC
The main part of the counting logic is integrated in a CMOS ASIC
specially designed for the Fluke MultiFunction Counter series. There
are also analog blocks included in the 100 pin QPF package.
MUX
The MUX block is a switchboard for incoming and internal signals
involved in the measuring process. Some signals are divided by 2 to
make it possible to measure higher frequencies. The trigger slope is
controlled by the MUX block as well. A trigger edge detector senses
the presence or absence of comparator pulses and controls the trigger
level DAC’s in the TLDAC block. These functional units form an es-sential part of the Auto Trigger System.
OSC
The oscillator block generates, selects, and distributes the reference
clock for the circuit. The active semiconductors of the standard oscil-
lator are included in this block. The crystal is connected to pins X1
and X2. A TCXO or OCXO is connected to X2 only. An external ref-
erence clock is connected to EXTREF. The PWM signal generated at
OTRIM controls the frequency of the reference oscillator after exter-
nal integration.
PG
A built-in pulse generator having the 10 MHz clock as a reference
can generate pulses with controllable duration and repetition rate at
the OUTPUT connector. The level is fixed TTL.
RTC
A real time clock not used at present.
TLDAC
This block contains two 10-bit DAC’s generating the trigger levels
for the input comparators, VOUTA for channel A and VOUTB for
channel B. An external reference voltage is connected to V+REFA
and V+REFB.
HO
The Hold Off block can manipulate the internal measuring signal X
in several ways. One operating mode simulates a low pass filter (nor-
mal hold off), another mode is used in burst measurements.
The following blocks (SYNC, STST, CNTS and MCTRL) form the
actual measuring logic in the ASIC. Three types of measurements
can be made in this MEAS block:
Continuous measurements (frequency, ratio and period average).
Not used at present.
Controlled measurements (time interval, period single, pulse width,
frequency, totalize gated, totalize start-stop, and ratio).
Totalize manual.
SYNC
The SYNC block synchronizes the actual measurement with certain
internal or external events like measuring time and arming signals.
STST
The start and/or the stop of the measurements are controlled by this
block. External events can be used to define the exact moments.
4-10 Hardware Functional Description
CNTS
Two 32-bit binary counters count external events or keep track of the
time.
Interpolator
This block is not used at present.
MCTRL
The different events in the measurement cycle of the ASIC are timed
by this block.
MPI
This is the microprocessor interface block. The bus width is 16 bits,
AD0 to AD15. Interrupts to the microprocessor are generated at INT.
GET
The GET signal from an optional GPIB interface can control the start
of a measurement.
External Interpolator
The X-POLATOR unit is connected directly to the internal
interpolator in the ASIC. It is used for increasing the time resolution
beyond the limits set by the reference clock period of 100 ns. An er-
ror pulse is generated in the SYNC block. Its width is determined by
the difference between an external event on an input channel and the
next clock pulse. This pulse controls a current generator charging a
capacitor. When the pulse has expired the voltage across the capaci-
tor is A/D converted and the value is added to the result. There are
two interpolators, one for the start event and one for the stop event.
They are calibrated over the possible error pulse range to allow for
any aberrations from the theoretical linear behavior.
Oscillator Circuits
CPU Oscillator
The microcontroller U11 is clocked at 12 MHz. The crystal B1 is
connected to the XTAL inputs of the microcontroller.
Reference Oscillators
A 10 MHz crystal oscillator is used as the reference for the measur-
ing logic. If a stable external 10 MHz reference is available, it can be
connected to REF IN on the rear panel and selected by means of the
EXT REF button on the front panel.
In addition to the standard crystal oscillator there are two optional
oven-controlled crystal oscillators (OCXO) to choose from.
Standard
The uncompensated standard oscillator consists of the crystal B2,
C109, C113-C115, R209 and R211. C115 is used for manual adjust-
ment of the frequency when the calibration tolerance has been ex-
ceeded. The active circuitry is built into the ASIC U29 and is accessi-
ble via the pins marked X1 and X2.
OCXO
If one of the OCXOs is mounted, the standard oscillator has to be in-
activated by moving the jumpers J23 and J25 to their alternative po-
sition. These oscillators are connected to J24 and are self-contained
Hardware Functional Description 4-11
FIN
1
MUX HO SYNC CNTS
STST
Inter-
polator
MCTRL
TLDAC
RTCPG
OSC
MPI
A2
A
SR
B
B2
EXTC
P
BURST
TRA
TRB
VCCO
GNDD1
GNDD2
GNDD3
GNDD4
GET
X1
X2
V+REFO
OTRIM
V-REFO
EXTREF
MTCXO
INTREF
OUTMUX
MPCLK
PH1
PH2
VCCB
GNDB
VCCC
GNDC
GNDA
VCCA +5
PGARM
M REF
F REQC
TIME
M CLK
RESET
CY1
CY2
VCCG
GNDG
VREFADIRES
INTP1
INTP2
INTS1
INTS2
FIN
MTIM E
V+REFA
VOUTA
V-REFA
V+REFB
VOUTB
V-REFB
VCCE
GNDE
VCCF
GNDF
X
Y
XH
YH
HOSX
HOSY
CLOCK
STOP
START
GA
TE
O
R1
R2
L1
L2
STAARM
STOARM
STADLY
STODLY
TOTSTA
STA
INTBINTA
SB
SA
I FN
aI
FN
bO
Ka
OK
b
PCL
OK
DM
AR
DM
AB
R
CS RS SS
PGTRIG
PGREF
PG
OU
T
PGTRIG
PGARM
MCLK
MCLK
PGOUT
CLOCK
STAARM
STOARMSTADLY
STODLY
HOSX
HOSY
GET
TOTSTA
STA
FREQC
TIME
MREF
RTC
RT
C
R1
R2
L1
L2
XH
YH
X
Y
PCL
ST OP
ST ART
HODLYX
HODLYY
I FN
A
FI
NB
IF
NC
IF
ND
OK
A
OK
B
OK
C
OK
D
PG
RT
CX
1
RT
CX
2
AL
AR
MN
VB
AT
AD
0-A
D1
5
AL
E
RD
N
WR
HN
WR
LN
CS
A1
6
A1
7
A1
8
A1
9
HO
LD
N
HL
DA
N
QD
MA
N
INT
S1
N
S2
N
S3
N
S4
N
S5
N
C1
C2
C3
C4
HODLYX
HODLYY
CLOCK
PGREF
VCCX +5
Fig. 4-11 Counter ASIC, block diagram.
units with facilities for coarse and fine adjustment. They are fixed to
the main PCB with two screws. The output signal is AC-coupled to
the X2 pin on U29 via C107.
External
This input consists of an AC-coupled line receiver with Schmitt trig-
ger function (U28) and is protected against excessive voltage
excursions by a resistor-diode network. The output signal from U28
has CMOS logic levels and is connected to the EXTREF pin on the
counter ASIC U29.
Logic
Microcomputer Circuits
Microcontroller
The microcomputer circuitry consists mainly of the microcontroller
U11, an Intel 16-bit CMOS 80C196, RAM (U22A), and EPROM
(U23A). The microcontroller is clocked at 12MHz. The data and ad-
dress lines AD0 to AD15 are shared by means of multiplexing.
Therefore the addresses are stored in the latches U16A and U17A.
The ALE signal (Address Latch Enable) enables the latches.
UVEPROM
The main program is stored in U23A that is mounted in an IC socket,
making it easy to update and customize the instrument firmware by
changing the EPROM.
EEPROM
Front panel settings, GPIB address and certain other data that are not
changed frequently, e.g. information in the Protected User Data
Area, are stored in U12A which does not need battery backup.
Reset Circuit
A special reset circuit, the power supply supervisor U10, is included
in the design. If the +5 V supply line becomes lower than 4.5 V, the
reset output pin 5 goes low and the microcontroller will start over.
The length of the reset pulse is set by C88; 2.2 µF gives a pulse of ap-
proximately 30 ms. U10 also controls the reset pulse during
power-up so that the microcontroller will be initiated correctly.
Keyboard Scanning
The keyboard scanning is done in two modes. The first mode is ac-
tive as long as no button has been detected as depressed. Then all out-
puts of U13A are set high, and the latch U14A is read. If no button
has been depressed, all outputs are low. This check is done at every
timer interrupt in the microcontroller, every 25 ms. If a button is
depressed, one of the output bits is high. When this event is detected,
mode two is entered. The outputs of U13A must be set high one after
the other to find the specific button. When found, only this button
will be checked, so other simultaneously depressed buttons will not
be recognized. The depressed button must stay down for several
timer interrupts before action is taken. After the button has been rec-
ognized, the timer interrupt SW will be waiting for the button to be
released. The button must be released for several timer interrupts be-
fore the keyboard scanning returns to mode 1. Then the search for
other activated buttons can be resumed.
The following three buttons are not scanned in this way:
– The ON button is connected to the ON/STANDBY logic in the
power supply.
4-12 Hardware Functional Description
RAMUV
EPROM
OM LCDDrivers LCD
Address & Data Bus
Address Bus
LatchKey-board
rd
CounterASICCPU Latch
I C Bus2
GPIB EEPROM
Fig. 4-12 Microcomputer circuits, block diagram.
V0-V7
AD0-AD7 H0-H3
AD
0-A
D7
U11
U13A
U14A
LOCAL/PRESET
SDASCL
Main Board Keyboard & DisplayBoard
CPU
HS
1.0
P1
.0P
1.1
Latch
Latch
Fig. 4-13 Keyboard scanning.
– The STAND-BY button is connected to the ON/STANDBY
logic in the power supply.
– The LOCAL/PRESET button is connected directly to input pin
24 on the microcontroller U11. Pressing this button sends an
interrupt to a special handler in the SW.
Rear Panel Unit
The rear panel contains the following connectors
INPUTS:
– External reference input D - REF IN (BNC)
– External arming input E - EXT ARM (BNC)
– Power supply inlet including EMI filter
OUTPUTS:
– Internal reference output G - 10 MHz OUT (BNC)
If a GPIB interface is installed in the device, it is mounted on the rear
panel and connected to the main board with a flat cable.
Besides the normal standard GPIB connector, this optional unit also
has a BNC connector capable of outputting an analog representation
of any three consecutive digits on the display.
There is also a 6 SPST DIP switch on this unit for setting the default
GPIB address.
Hardware Functional Description 4-13
OF FO N
G D E
1 6 8 4 2 1
R L1 , D C1 , DT 1, E 2S H 1, AH1 , T 5 , L4 , SR 1 ,I E E E 4 88 / IE C 62 5 INT ER F ACE
A DDR E S S
90 V - 26 5V
1 . 6 ATP R I MA RY F U S E I N S ID E
- I NT - S T B Y
B AT T E R Y
A NA L O G O U T
1 0 M Hz O U T R E F I N E X T AR M
P M9 6 2 1
P M9 6 2 3
P M9 6 2 4
P M9 6 2 5
P M9 62 6
P M9 67 8
P M9 69 0
P M9 69 1
P M9 6 28 / 85
_ _ _ _ _ __
_ _ _ _ _ __
P M9 6 9 7 - EX T /L I NEP O WE REXT SUPPLY
12-24V DC
Fig. 4-14 Rear panel.
Optional Units
GPIB Interface Including Analog Output
GPIB, PM9626B
The GPIB interface controls the communication between the internal
microprocessor and the external GPIB bus. A 32K extension of the
ROM and RAM is placed on the interface board. An analog output is
also included. The PCB is connected to J18 on the main board with a
ribbon cable and fixed to the rear panel with two screws. Two metal
studs at the rear edge of the PCB are inserted in slots on the main
board in order to relieve mechanical stress.
The GPIB control circuit, IC113, communicates with the external
GPIB bus via the bidirectional bus drivers IC114 and IC115. IC113 is
controlled from the microprocessor by writing and reading in the in-
ternal control registers. If IC113 has a message for the microproces-
sor, it uses the GPIB interrupt signal. The address switch setting is
read by the microprocessor via IC116.
A 32K extension of both ROM (IC109 and IC110) and RAM (IC111
and IC112) is placed on the interface board. The circuit board is pre-
pared for a 16-bit extension, but only 8 bits are used. IC110 (ROM),
IC112 (RAM) and R118 are not mounted. IC107, IC108 are address
latches and IC101, IC106 and IC117 use the latched address to gener-
ate chip select and chip enable signals for internal use on the GPIB
board.
Analog Out
The result on the display can be converted to an analog signal by
means of a pulse-width-modulated (PWM) signal from the micro-
processor. The signal is filtered, attenuated, offset-adjusted, inte-
grated and buffered by IC103 and supporting passive components to
give an analog DC level between 0 and 4.98 V with a resolution of
20 mV. The analog output has a separate analog ground connected to
the cabinet.
HF Input
You can add an optional prescaler. This HF input is mounted on the
main board, to the right of the input amplifier. It is connected to J19
where there are three pins reserved for ID coding. Preparations have
thus been made for other prescalers with different prescaling factors.
Prescaler 3.0 GHz, PM9624
This prescaler cannot be repaired at a local workshop. It must be sent
to the factory for repair.
The prescaler consists of the following parts:
Limiter
– The limiter consists of a 6 dB attenuator and a PIN diode at-
tenuator to achieve constant input amplitude to the amplifiers.
Amplifier
– Five amplifier stages are divided into three blocks. One block
consists of one amplifier. Two blocks consist of two amplifierseach and an AGC control.
Automatic Gain Control (AGC)
– Helps the amplifiers retain a constant output amplitude.
Dividers
– Two dividers divide the input signal frequency by 16.
Detector
– Detects whether the level of the input signal is high enough to
ensure correct measurement and, if not, blocks the output sig-
nal from the prescaler.
Positive Voltage Regulator
– Supplies a well-regulated voltage to the HF amplifiers.
4-14 Hardware Functional Description
IC113
IC101/106/117
IC114/115
IC107/108
IC116
AD0-15
A0-15
+5V
GPIB
connector
IC109/
110
IC111/
112
Ba
sic
bo
ard
Fig. 4-15 GPIB interface.
IC103
IC103
+7V-5.2V
Analog
OutPWM
Full scale
Zero
Fig. 4-16 Analog output.
Software Functional Description
General
The PM 6685 software is divided into two main modules: the GPIB
and DEVICE modules. The GPIB fully implements the Message Ex-
change protocol as described in the IEEE 488.2 - 1987 standard.
The DEVICE module is a real-time measurement executive that can
be interrupted to do other tasks, such as handling the keyboard, per-
forming bus commands etc.
The basic structure of the main module is as follows:
main PM6685()
Initialize();
while (TRUE)
if (BREAKFLAG_KEYBOARD)
HandleKeyboard();
if (BREAKFLAG_PRESET)
PresetDevice();
if (BREAKFLAG_GPIBCOMMAND)
ExecuteGpibCommands();
if (BREAKFLAG_RESTART)
RestartMeasurement();
while (not any BREAKFLAG)
Measure( );
All break flags are set by interrupt-driven events, either from exter-nal functions (the GPIB interface) or from internal functions (timers
etc.).
The Initialize procedure does all necessary initialization at power
up. It also does the power up tests. See Power-On test in chapter 2.
The Handlekeyboard procedure controls all user input/output via
the front panel, except displaying the measurement results.
The PresetDevice procedure reprograms the complete device when
the PRESET key has been pressed (in local mode). It aborts pending
measurements.
TheExecuteGpibCommands procedure executes GPIB commands
and, if a query is received, it starts the response formatter and sends
the requested data to the GPIB interface. If the display is switched
on, the results are also displayed.
The RestartMeasurement procedure aborts pending measure-ments; the measure loop will later continue to measure. This is
mainly used when the RESTART key is pressed.
TheMeasure procedure is the measurement control loop that is used
in local mode. It sends its result to the display.
The ParseGpibInputData procedure parses the GPIB messages
found in the input buffer and sends executable statements to the
ExeceuteGpibCommands procedure. The input of data to the input
buffer from the external GPIB interface is fully controlled in inter-rupts. These interrupts are always enabled so the new data bytes can
be stored in the input buffer while parsing commands. This
ParseGpibInputDat is also executed in interrupt.
Software Functional Description 4-15
Test Routines
Test Routines via AUX MENU Key
The test routines are the routines accessible via the AUX MENU key.
Refer to the PM6685 Operators Manual.
Power-On Tests
At power-on some tests are automatically performed. If any of these
tests fails, an error message is displayed and the instrument is halted.
Pressing the LOCAL/PRESET key makes the device continue inde-
pendently of the detected error, but without performing the next tests
in the start-up sequence.The following tests/actions are performed:
– Write 001 to internal test pins
– Pulse all microcomputer i/o ports twice
– Write 0.1 on display
– Write 0.1.2. on display and 010 on test pins
– Test mC internal RAM ( error = Err mC & halt)
– Write 0.1.2.3 to display and 011 on test pins
– Test mC timer ( error = Err mC & halt)
– Write 0.1.2.3.4. on display and 100 on test pins
– Test main board RAM ( error = Err ra. & halt )
– Write 0.1.2.3.4.5. to display and 101 to test pins
– Test ASIC ( error = Err. 5xx & halt)
– Write 110 on test pins
– Check display (light all segments for 2 s)
– Clear Display
– Perform GPIB RAM test if GPIB is installed
(error = Err ra. & halt)
– Write 111 on test pins ( final value)
– Clear display and start normal measurement procedure
4-16 Software Functional Description
Chapter 5
Repair
Preventive Maintenance
Calibration
To maintain the performance of your counter we recommend that
you calibrate your instrument every year, or more often, if greater
time base accuracy is required. Calibration should be performed with
traceable references and instruments at a certified calibration labora-
tory. Contact your local Fluke representative for calibration.
To know the present status of your instrument, test your timer/coun-
ter from time to time. The test can be made according to the informa-
tion in Chapter 2, Performance Check.
Oscillators
The frequency of the reference crystal oscillator is the main parame-ter affecting accuracy in a counter. The frequency is affected by ex-ternal conditions like the ambient temperature and supply voltage,
but also by aging. When recalibrating, the reference crystal oscillator
is compensated only for deviation in frequency due to aging.
Some important points:
– The high stability oscillators have been built into an oven in
order to keep the oscillator temperature as stable as possible.
Continuous operation is also important for stability. After a
power interruption, the oscillator restarts at a slightly different
frequency. It will then, as time goes on, age at an equal rate.
– The stability indicated for the oscillators is valid within a tem-
perature range of 0 to +50 °C, with a reference temperature of
+23 °C. If the timer/counter is used in a room temperature of
20 to 30 °C, the temperature stability of an OCXO will be in-
creased by a factor of 3.
– The temperature stability indicated for the standard oscillator is
mainly dependent on the ambient temperature. When the coun-
ter is operating there is always an internal temperature increase
that will influence the oscillator.
Recalibration intervals
The Mean Time Between ReCalibration, MTBRC, is defined as:
MTBRCAcceptable error Temperature stability
Agi= −( ) ( )
( ng)
MTBRC can be calculated when the total acceptable error and the
oscillator specifications are known.
The total acceptable error is defined as:
( )( )
(Acceptable error
Deviation of reference frequency=Nominal reference frequency)
5-2 Preventive Maintenance
Model PM6685 PM6685R
Option:
Timebase type:
Standard
UCXO
PM9691
OCXO
PM9692
OCXO Rubidium
Total uncertainty, for operating temperature
0 °C to 50 °C, at 2 (95%) confidence interval:
- 1 month after calibration
- 3 months after calibration
- 1 year after calibration
- 2 years after calibration
< 1.2 x 10-5
< 1.2 x 10-5
< 1.2 x 10-5
< 1.5 x 10-5
< 3 x 10-8
< 4 x 10-8
< 1 x 10-7
< 2 x 10-7
< 8 x 10-9
< 1.2 x 10-8
< 2.5 x 10-8
< 5 x 10-8
< 4 x 10-10
< 4 x 10-10
< 4 x 10-10 *
< 6 x 10-10 *
Typical total uncertainty, for operating
temperature 20°C to 26°C, at 2 (95%) confi-
dence interval:
- 1 month after calibration
- 3 months after calibration
- 1 year after calibration
- 2 years after calibration
< 4 x 10-6
< 4 x 10-6
< 7 x 10-6
< 1.2 x 10-5
< 3 x 10-8
< 4 x 10-8
< 1 x 10-7
< 2 x 10-7
< 8 x 10-9
< 1.2 x 10-5
< 2.5 x 10-8
< 5 x 10-8
< 1 x 10-10
< 2 x 10-10
< 2.5 x 10-10 *
< 5 x 10-10 *
*After 1
styear of operation. For 1
styear add: < 3 x 10
-10
Table 5-1 Stability of timebase oscillators.
Example:
– A user can accept a maximum of 3 Hz deviation on the
10 MHz frequency of the oscillator. This results in:
( )Acceptable error =×
= × −3
10 103 10
6
7
The aging and temperature factors can be selected from the table on
page 5-2.
The value of the aging factor is correctly selected from the table
when the calculation of MTBRC results in 1 to 30 days (use /24h), 1
to 12 months (use /month) or over 1 year (use /year) (not, e.g., 43
days or 17 months or 0.8 years).
Example:
– The user has the same requirements as in the example above.
The counter has a PM9691 oscillator.
– Look up information about PM9691 in the table on page 5-2.
The results will be the following:
Relative Frequency deviation caused by:
– Ambient temperature deviation
(within 0 to 50 °C; reference point at 23 °C): Less than
3 * 10–8
– Aging/year: Less than 1.5 * 10–7
– Use the MTBRC formula with the above values. This gives a
MTBRC of maximum:
3 10 3 10
15 1018
7 8
7
× − ××
=− −
−.. year
NOTE: When recalibrating, the reference crystal oscillator will be
compensated only for frequency deviation caused by aging.
When to Replace the Fan(PM6685R only )To maintain the high reliability of a counter used in
around-the-clock’ applications, you must replace the fan every sec-
ond year. For part time and low ambient temperature use, you can ex-
tend this service interval to 6-10 years or more. Additional informa-
tion can be found in Chapter 9, Appendix.
Preventive Maintenance 5-3
Troubleshooting
General
Quick Troubleshooting
The PM6685 is a highly integrated Frequency counter with dedicated
LSI counter circuits and microcontrollers that control the complete
units. The microcontroller can help you locate faulty parts by run-ning test programs and generating stable signal patterns on t
he bus. If the microcontroller does not work or the fault is in a part of
the counter that cannot be accessed by the microcontroller, tradi-tional troubleshooting must be performed.
Where to Start
After reading the safety instructions, continue with this chapter for
troubleshooting and repair instructions. When you have fixed the in-
strument, always do the Safety Inspection and Test after Repair, as
described later in this Chapter. Then do the checks in Chapter 2, Per-
formance Check. Recalibrate if required by following the adjustment
instructions in chapter 6, Calibration Adjustments.
Logic Levels
The PM6685 contains logic of four families. The levels for these
families are listed in the following table.
Required Test Equipment
To test the instrument properly using this manual, you will need the
equipment listed below. The list contains specifications for the criti-
cal parameters.
PROM Identification
There are two different PROMs in the PM6685, one on the main
PCB containing the instrument firmware, the other on the optional
GPIB board, containing the interface bus firmware.
They have labels with version designation of the traditional form
Vx.yz, where x, y, and z are digits. The last digit can be followed by a
single letter. The version numbers do not have to coincide, except for
the last letter. So the combination Vr.stE and Vu.vwE is valid,
whereas Vr.stE and Vu.vwF is not.
Operating Conditions
Power voltage must be in the range of 90 to 260 VAC.
Introduction
The troubleshooting strategy for the PM6685 is an integrated part of
the overall service strategy for the instrument. This instrument is hi-
5-4 Troubleshooting
Positive
ECL
Negative
ECL
CMOS TTL
Supply voltage +5 V -5.2 V +5 V +5 V
Signal ground 0 V 0 V 0 V 0 V
Input voltage
High, VIH >+3.9 V >-1.1 V >+4 V >+2 V
Low, VIL <+3.5 V <-1.5 V <+1 V <+0.8 V
Output voltage
High, VOH >+4 V >-1 V >+4.9 V >+2.7 V
Low, VOL <+3.3 V <-1.7 V <+0.05 V <+0.4 V
Bias ref. voltage, VBB +3.7 V -1.3 V - -
Table 5-2 Logic levels.
Type Performance
DMM 3.5 digits
Oscilloscope 300 MHz 2-channel
Signal generator 3300 MHz
Power supply 12 V/2 A
BNC-BNC 50 cables RG-58
Table 5-3 Required test equipment.
INPUTAMPLIFIER(Level 9)
D/ACONVERTERS (Level 8)
MEASURING LOGIC(Level7)
KEYBOARD (Level6)
INTERNAL CONTROLSIGNALS& DISPLAY(Level 5)
MICROCO MPUTER KERNEL (Level 4)
MICROCONTROLLER (Level 3)
OSCILLATOR(Level 2)
POWERSUPPLY(Level 1)
GPIB(Level 10)
Fig. 5-1 Functional levels.
erarchically designed in different levels, and troubleshooting can be
performed in any design level if the lower levels are OK. It is, there-fore, important to disconnect all options at the beginning of the trou-bleshooting procedure.
Power Supply
Connect the counter to line power.
– Set the counter to STAND-BY mode.
– Check that the voltage between J9 and J10 is in the range of
90 to 260 VAC, (see Fig. 5-2).
– Check that the input voltage to the power module, U39 be-
tween pin 1 and pins 4 and 5 on the bottom side of the PCA, is
120 to 375 VDC.
– Move the jumper J16 to the DISCONNECT position.
– Check the “STAND BY” voltages after the power module,
U39. Use for instance the screen around the input amplifier asground connection. There are also a number of ground pads on
the PCB available for this purpose.
*NOTE: If this voltage does not meet the above-mentioned
spec, and if it is not possible to adjust it, the output
resistances of the module must be checked.
To verify the Power Module proceed as follows:
– If the primary fuse is broken, there is a short circuit in the
primary circuits. Use a DMM and try to locate the fault byresistance measurements.
– Disconnect L6 and check the resistance between pin 1 andpins 4 and 5 on the power module. The DMM should notshow a short circuit. Put L6 back.
– Check that the DC voltage between pin 1 and pins 4 and 5on the power module is about 2 times the inputAC-voltage. If not, use traditional troubleshooting tech-niques to locate the fault.
– Remove the power cable from the counter.
– Measure the resistances according to the table below.
– If one of the above-mentioned measurements shows 0 ,
remove L7, L8, and L9 and use conventional troubleshoot-ing techniques to isolate the fault.
– Measure the resistances according to the table below.
If the resistances deviate considerably from the values in the table,
the complete power module must be replaced.
– Move jumper J16 to the CONNect position.
– Connect the power cable to the counter.
– Switch the counter ON.
– Check the “POWER ON” voltages.
*NOTE: If the +5 V voltage is outside the specification, all
other levels will be wrong, since they are based on the
+5 V level.
If you find any fault, continue with traditional troubleshooting tech-niques and replace defective circuits. Also refer to Power Supply in
Chapter 4, Circuit Descriptions.
Troubleshooting 5-5
Power
Modu le
Fuse
TP23, +5TP20, -5.2
TP22, +7
J10
J9J4
J3
+5V adjust
6 14
1 5
TP21,+12V
TP15, +5TP17, -7
J15
TP16, +15
LoadDisco
nne
cted
Con
ne
cted
J21
J16
Fig. 5-2 Test points and trimmers for the power supply.
Test Points Voltage
TP15 +5.10 V ± 10 mV*
TP16 +14.8 V to +21 V
TP17 –12.5 V to –7.5 V
TP21 +12 V ± 0.5 V
Table 5-4 Standby voltages.
Test Pins Resistance
(GND) and TP15 (+5 V) 10
(GND) and TP16 (+15 V) 1.5 k
(GND) and TP17 (–7 V) 270
Table 5-5 Output resistances.
Test Pins Resistance
10, 11 and 13, 14 150
8 and 9 1.5 k
6 and 7 270
Table 5-6 Output resistances.
Test Points Voltage
TP23 +5.06 V ± 30 mV*
TP20 –5.2 V ± 50 mV
TP22 +7 V ± 100 mV
Table 5-7 Power-on voltages.
Oscillator
Standard Oscillator
– Be sure the jumpers J23 and J25 are in the STD position, (see
Fig. 5-4).
– Check that 10 MHz is present at U29, pin 42.
– Check that 10 MHz is present at the rear panel connector
10 MHz OUT (J27).
If you find any fault, continue with traditional troubleshooting tech-
niques and replace defective circuits. Also refer to Chapter 4, Circuit
Descriptions, Oscillator Circuits.
OCXO, PM9691 or PM9692
This test can be carried out only if the counter is equipped with one of
the optional oscillators, PM9691 or PM9692.
– Be sure the jumpers J23 and J25 are in the OPT position, (see
Fig. 5-4).
– Check that 10 MHz is present at U29, pin 42.
– Check that 10 MHz is present at the rear panel connector
10 MHz OUT (J27).
These oscillators cannot be repaired in a local workshop. They must
be sent to the factory for repair.
Microcontroller
– Check that 6 MHz is present at U11, pin 65 (see Fig.5-3).
– Check that the RESET circuit U10 works properly by moving
the RESET jumper J29 temporarily to the ON position.
If the CPU is not running, check the state of the pins J11-J13. See ta-
ble below.
If you find any fault, continue with traditional troubleshooting tech-
niques and replace defective circuits. Also refer to Chapter 4, Circuit
Descriptions.
NOTE: Check that activity is going on at U11 pin 62 (ALE), pin
61 (RD), pin 63 (INST), and pin 43 (READY). These
pins should not be stuck HIGH or LOW.
– If one or more bits on the AD-bus are corrupt, themicrocontroller (C) often reads the same instructions re-peatedly. When the C discovers an invalid OP code, it will
RESET itself and start from the beginning again. The Csets the RESET input low when it resets itself. This can bediscovered at the RESET input of U11, (pin 16). If +5 V toU10 is OK, this could be the cause of trouble.
5-6 Troubleshooting
U11
J11
J1
2
J1
3J1
4
J29J30
10 27
44
161
Stand
C11B2
Optio
14
1
B1
U2
3
U17U16
U2
2U
13
U1
4
Fig. 5-3 Test points and jumpers for checking the
microcontroller.
r
e
U29
Standard oscillator
C115B2
J24
Optional OCXO
Optional oscillator
J23 J25
31
811
51
1U
23
Coarse adjust
Fine adjust
J27
Fig 5-4 Trimmers for the reference frequency oscillators.
Display JP11, J12,
J13
Message Error Action
0.1 0, 0, 1 - C I/O port
error
Replace U11
0.1.2 0, 1, 0 Err UC C internal
RAM error
Replace U11
0.1.2.3 0, 1, 1 Err UC C timer er-
ror
Replace U11
0.1.2.3.4 1, 0, 0 Err rA RAM error Replace U22
0.1.2.3.4.5 1, 0, 1 Err ASIC ASIC error Replace U29
All seg-
ments
1, 1, 0
1, 1, 1 Err rA GPIB RAM
error
Replace U111 on
GPIB board
Test OK
Table 5-8 Start-up test.
Input Amplifier
A Input Check
DC levels
– Switch on the counter.
– Press LOCAL/PRESET and ENTER.
– Deselect AUTO and set the sensitivity to 1 Vrms.
– Measure the DC voltages according to Fig. 5-5. Use the DMM
with a 10 k resistor in series with the test cable.
AC levels
– Connect a 1000 Hz sine wave signal with an amplitude of
1 Vpp to Input A.
– Measure the AC-levels according to Fig. 5-5. Use the oscillo-
scope and a 10 M probe.
If you find any fault, continue with traditional troubleshooting tech-
niques and replace defective circuits. Also refer to Input Amplifiers
A and B in Chapter 4, Circuit Descriptions.
Troubleshooting 5-7
TP27, -1.4V
U8
Q1
Q3
Q4U1
U9
Q130V
0.3Vpp1.5V
0.6Vpp
0.6Vpp
0.8V
7V
0V0.6Vpp
1Vpp
4.3V
0.8V
0.4V
-3V
-2.3V
Q2
TP26, -1.4V
TP11
TP10
2V
-2V
D4
D3
D1 D2
-1.7V -0.9V
R23
R31R33
R91
R22
C1
C2
Fig. 5-5 Typical voltages, input amplifier.
Prescaler 3.0 GHz, PM9624
See Chapter 2, Performance Check, for verification.
This prescaler cannot be repaired in a local workshop. It must be sent
to your Fluke representative for repair.
GPIB Interface and Analog Output
General Remark
If the GPIB board is suspected to be faulty, be sure the basic instru-
ment is OK by performing a few functional checks after the ribbon
cable has been disconnected from J18.
Analog Output
The microcontroller generates a PWM signal that is applied to pin 1
on U101. The frequency is approximately 20 Hz, but the duty cycle is
dependent on several factors like the frequency of the measured sig-
nal, the measurement time, and the selected scaling factor.
The PWM signal is converted to a DC voltage between 0 V and
4.98 V by integration, first in a passive RC network (R101, C103,
R102, C102 and then in an active integrator U103.
Setup
– Connect the counter to line power.
– Switch on the counter.
– Press PRESET and then ENTER.
– Connect a DMM to the BNC output BU102.
– Activate the analog output.
– Select AUX MENU.
– Press DATA ENTRY / until the display reads ANA-LOG OUT.
– Press ENTER
– Press DATA ENTRY / to select ON.
– Press ENTER.
– Press DATA ENTRY / until the display reads 1.0-3
V.
– Press ENTER.
– Connect a LF synthesizer to Input A on the counter.
– Set the synthesizer to 500 Hz, 1 VPP
– Read the DMM result. The voltage should be 2.49 V ± 35 mV.
Minor deviations can depend on the settings of the trimmer potenti-
ometers for ZERO and FULL SCALE. See Chapter 6, Calibration
Adjustments, for a decription of the procedure to follow.
Large deviations indicate a fault. Trace the signal through the inte-
gration chain with traditional troubleshooting techniques and replace
defective circuits. The duty cycle at U101:1 should be 50 %. Also re-
fer to GPIB Interface Including Analog Output in Chapter 4, Circuit
Descriptions.
Bus Interface
A simple method to check the most fundamental functions of the in-
terface is to send the standardized query message *IDN? and check
the response string.
Setup
– Make sure you have access to a PC with GPIB capability.
– Check that there is a program installed that can send simple
commands entered via the keyboard and that can receive and
display the response strings.
– Connect the GPIB connectors of the counter and the PC by
means of a standard GPIB cable.
– Set the address switches on the counter (the five rightmost
ones seen from the rear) so that their binary weight corre-
sponds to the wanted decimal value between 0 and 30.
– Send the command *IDN? to the counter and observe the re-
sponse string. See the programming manual for more
information on the response format and contents.
– You can also try the command *OPT? to get a listing of in-stalled options (except OCXO).
If you find a fault, continue with traditional troubleshooting tech-niques and replace defective circuits. Try to exercise the address/data
bus by writing small program loops. Look for stuck nodes with an
oscilloscope.
5-8 Troubleshooting
0
Sensitivity
-10 dBm
-20 dBm
-30 dBm
-40 dBm
-50 dBm1 GHz 2 GHz 2.5 GHz
Frequency
Fig. 5-6 Specified and typical sensitivity of input C(PM9624).
U109
U101U106
BU
101
U103Zero
GPIB
BU102BU103
Full Scale
U1
07
U1
11
U1
08
U113
U116
U117
U114 U115
Fig. 5-7 Component layout, GPIB interface.
Safety Inspection and Test After Repair
General Directives
After repair in the primary circuits, make sure that you have not re-
duced the creepage distances and clearances.
Before soldering, bend component pins on the solder side of the
board. Replace insulating guards and plates.
Safety Components
Components in the primary circuits are important to the safety of the
instrument and may be replaced only by components obtained from
your local Fluke representative.
Checking the Protective GroundConnection
Visually Check the correct connection and condition and measure
the resistance between the protective lead at the plug and the cabinet.
The resistance must not be more than 0.5 . During measurement,
the power cord should be moved. Any variations in resistance show a
defect.
Safety Inspection and Test After Repair 5-9
This page is intentionally left blank.
5-10 Safety Inspection and Test After Repair
Chapter 6
Calibration
Adjustments
Introduction
Required Test Equipment
* For adjustment of PM9691 and PM9692 Oven Oscillators only.
Note: Only calibrated instruments should be used.
Preparation
WARNING: Live parts and accessible terminals which
can be dangerous to life are always exposed inside
the unit when it is connected to line power. Use ex-treme caution when handling, testing, or adjusting
the counter.
Before beginning the calibration adjustments, power up the instru-ment and leave it on for at least 30 minutes to let it reach normal oper-ating temperature.
Power Supply
CAUTION: If you adjust the +5 V trimmer you have toadjust the complete instrument.
Setup
– Remove the protective cover above the power module.
WARNING: The heat sink inside the power module is
connected to line power.
– Connect the counter to line power.
– Switch on the counter.
– Press PRESET, then press ENTER.
NOTE: The backlight must be switched on during the adjust-
ment of the power module.
Adjustment
– Connect the DMM to test point TP15 = +5V and GND, (see
Fig. 6-2).
– Adjust the +5V trim potentiometer inside the power module
until the DMM reads +5.10 ± 0.01 V.
– Check that the voltage between the test point TP23 = +5 V and
GND is +5.06 ± 0.03 V.
– Check that the unregulated voltage from the power module at
test point TP16 = +15 V is about +18 V.
– Check that the unregulated voltage from the power module at
test point TP17 = –7 V is about –8 V.
– Reinstall the protective cover onto the power module.
6-2 Introduction
Power
Module
Fuse
TP23, +5
TP20, -5.2
TP22, +7
J10
J9J4
J3
+5V adjust
6 14
1 5
TP21,+12V
TP15, +5TP17, -7
J15
TP16, +15
LoadDis
co
nn
ecte
d
Con
ne
cted
J21
J16
Fig. 6-1 Test points and trimmer for the Power Supply.
Type Performance
DMM Acc. 0.02% / Res. 1V
HF synthesizer 3300 MHz
Pulse generator 125 MHz / 2 ns rise/fall time
LF synthesizer 50 MHz / 20 Vpp
Oscilloscope 300 MHz / 2-channel
Passive probe 10:1, preferably 500 (or well
compensated 10 M
FET probe 300 MHz
Power supply 12 V / 2 A
Power splitter 50 / 4W
Feed-through termination 50
10 MHz reference 1x10-7
10 MHz reference 1x10-9
*
BNC-BNC cables Different lengths
Screwdrivers Torx 10 & 20
Table 6-1 Required test equipment.
Input AmplifierThe instructions in this section are consecutive. Do not change a set-ting until you are told to do so, either in the text or in the tables.
Setup
– Remove the screen shield before performing any adjustments
in the input amplifier.
– Connect the counter to line power.
– Switch on the counter.
– Press PRESET, then press ENTER.
Offset
– Connect the DMM to Pin 10 of U8 and GND = screen, see
Fig. 6-2. Pin 1 is marked in the figure and is the middle pin onthe side closest to the rear of the unit. Alternatively you can
use one of the soldering pads of resistor R114 as a test pad, as
it is connected to Pin 10. This resistor is normally not
mounted.
– Adjust R33 = OFFSET A until the DMM reads 0.0 ±0.2 mV.
Linearity
Setup
– Press the Waveform Key once. (This step puts the instrument
into the correct mode so that it switches from x1 Attenuator to
x11 Attenuator when the sensitivity is adjusted above 2.8V.)
– Connect the pulse generator to the A input of the counter via
the power splitter.
– Connect the other output from the power splitter to channel A
of the oscilloscope.
NOTE: The Pulse Generator with 50 ohm output impedance
should be set to 5 Vpp when loaded in 50 , so that the
level recorded at the CRO A channel (equal to the in-
put to the DUT) is 2.5 Vpp, after going through the split-
ter.
NOTE: If you are using a 10 M x10 CRO probe, ensure that
its compensation has been correctly adjusted, so that
incorrect observations of undershoots/overshoots are
not made.
– Use the probe to connect channel B of the oscilloscope to
Pin 10 of U8 .
– Adjust R31 = LIN A until both signals look as alike as possi-
ble.
NOTE: The AC coupling will give the curve a slight tilt.
x1 Attenuator
Setup
– Adjust C2 = X1 until both signals on the screen look as alike
as possible, without any overshoots or undershoots. The level
displayed on the CRO B channel for Pin 10 of U8 is approxi-
mately 1.2 Vpp.
x11 Attenuator
Setup
– Adjust C1 = X11 until both signals on the screen look as alike
as possible, without any overshoots or undershoots.
Input Amplifier 6-3
Off set A (R33)
Z E R O A DJ. COMP I
L i n A (R31)
X11 (C1)
X 1 (C2)
TP10, T R IG L E VE L COMP I
TP11, TRIG LEVEL COMP
Z E R O A DJ . COMP I I
TP27
1
13
, S E NS E
S ense A dj .
TP26, SENSEJ2 U8
Fig. 6-2 Test points and trimmers for the Input amplifiers.
PM6685 Input A 50
Sensitivity Any level below 1 Vrms
Pulse generator Amplitude 5 Vpp in 50
Period 2 ms, symmetrical
Oscilloscope Time 200 s/div
Setting: A 0.5 V/div, 50 , DC
Setting: B 20 mV/div, 10:1 probe, DC
Table 6-2
PM6685 Impedance 50
Sensitivity Any level below 1 Vrms
Pulse generator Amplitude 5 Vpp in 50
Period 100 s, symmetrical
Oscilloscope Time 10 s/div
Setting: A 0.5 V/div, 50 , DC
Setting: B 20 mV/div, 10:1 probe, DC
Table 6-3
PM6685 Impedance 50
Sensitivity Any level above 2.8 Vrms
Pulse generator Amplitude 5 Vpp
Period 100 s, symmetrical
Oscilloscope Time 10 s/div
Setting: A 0.5 V/div, 50 , DC
Setting: B 5 mV/div, 10:1 probe, DC
Table 6-4
– Observe that the level displayed on the CRO B channel for
Pin 10 of U8 is now approximately 120 mVpp, indicating that
the x11 Attenuator has been selected.
Trigger Levels
Setup
– Disconnect all input signals to the counter.
Zero levels
Channel A
– Connect the DMM to test points TP10 = TRIG LEVEL
COMP I and GND = screen.
– Adjust R69 = ZERO ADJ COMP. I until the DMM reads
+0.95 ± 0.05 mV.
– Connect the DMM to test points TP11 = TRIG LEVEL
COMP II and GND=screen.
– Adjust R70 = ZERO ADJ COMP. II until the DMM reads
–0.95 ± 0.05 mV.
Sensitivity
Setup
– Measure the DC voltage between test points TP26="–" and
TP27="+", (see Fig. 6-2).
– Adjust R91 = SENSE until the DMM reads 10 ± 0.2 mV.
Offset
Setup
– Connect the Signal generator to the A input of the counter.
– Press NULL on the counter.
– Decrease the amlitude from the signal generator to
–28 dBm.
– Adjust R33 = OFFSET A until the counter reads < ±100 Hz.
– If this is not possible, adjust R91= SENSE until the counter
reads < ±100 Hz.
NOTE: Reinstall the screen shield after making these adjust-ments.
Reference Oscillators
NOTE: The standard oscillator is always mounted in the unit,
even if an optional oscillator is installed. You set the
jumpers J23 and J25 to select the timebase source
that you want to use.
Standard Oscillator
Setup
– Connect the counter to line power.
– Switch on the counter.
– Press PRESET, then press ENTER.
– Connect the 10 MHz reference to the A input of the counter.
– Press CHECK, NULL, and CHECK again.
The adjustment should preferably be made at an ambient tempera-
ture of +23 C.
Adjustment
– Adjust C115 = STD OSC ADJ, until the counter reads
10 MHz 5 Hz.
NOTE: Move the two jumpers J23 and J25 back to position
OPT if an optional oscillator is installed.
6-4 Reference Oscillators
PM6685 Impedance 50
Sensitivity 10 mVrms
Signal generator Amplitude –18 dBm
Frequency 50 MHz
Table 6-5
PM6685 Impedance 50
Sensitivity 10 mVrms
Table 6-6
r
e
U29
Standard oscillator
C115B2
J24
Optional OCXO
Optional oscillator
J23 J25
31
811
51
1U
23
Coarse adjust
Fine adjust
J27
Fig. 6-3 Trimmers for the reference oscillator frequency.
Oven-Controlled Oscillators (OCXO),PM9691 & PM9692
PM9691 is adjusted to 10 MHz ± 0.2 Hz when manufactured,
PM9692 to 10 MHz ± 0.05 Hz, so there is no need to adjust the fre-
quency directly after installation.
These oscillators, like any oscillator, change frequency because of
aging. Use the table in the User’s Handbook, Chapter 11, to calculate
when calibration is due. The complete specifications can be found in
the same manual, Chapter 12.
Required test equipment
Setup
– Connect the counter to the line power.
– Switch on the counter.
– Set the counter to default settings (preset).
Make the adjustment at an ambient temperature of +23 °C, if possi-
ble. The oscillator must have been operating continuously for 48
hours before an adjustment.
– Connect the 10 MHz OUT socket of the counter to be adjusted
(rear panel) to the Input A of the PM6681R/PM6685R.
– Set up the PM6681R/PM6685R:
– Measuring time = 0.5 s
– 50 input impedance
– Frequency A measurements
Adjustment
The oscillator has a voltage controlled adjustment range. This range
is divided into five fixed steps set via DIP switches, and a trimmer to
fine tune the control voltage.
Normally the range of the trimmer should be sufficient to compen-
sate for the aging that occurs during at least two years of operation.
Fine adjustment
– Adjust the trimmer to better than 10 MHz ± 0.2 Hz (PM9691)
or 10 MHz ± 0.05 Hz (PM9692), i.e. ±20 resp. ±5 in the last
two digits on the PM6681R/PM6685R display.
– If this adjustment is OK, reassemble the counter.
Coarse adjustment
Make this adjustment only if the trimmer range is insufficient to ad-
just the oscillator.
– Remove the tape from the DIP-switch.
– Adjust the trimmer to its mid position (about 12 turns from ei-
ther end position).
Read the frequency on the PM6681R/PM6685R.
(Nominal 10.000000 MHz).
– If the frequency is too low, set the DIP-switches to the nexthigher voltage range.
– If the frequency is too high, set the DIP-switches to thenext lower voltage range.
NOTE: There are also oscillators that do not have DIP
switches. If this is the case, then the trimmer potenti-ometer alone covers the whole adjustment range.
Reference Oscillators 6-5
Fig. 6-4 Adjusting the optional oscillator frequency.
Connector
Trimmer for fine tuning
Switches for coarse adj.
Instrument Required specification Model
Counter with RubidiumReference
10 MHz ± 0.01 Hz (Uncer-tainty 1x10
-9)
PM6681R orPM6685R
Table 6-7
Trimmer range (V) DIP switch number (1 = on, 0 = off)
1 2 3 4 5 6 7 8
2.6 - 3.4 0 0 0 1 0 0 0 0
3.2 - 3.9 0 1 0 1 1 0 0 0
3.5 - 4.3 1 0 0 1 1 0 0 0
4.0 - 4.7 1 0 1 1 1 1 0 0
4.1 - 5.0 1 0 1 0 1 1 1 0
Table 6-8
Other Options
HF Input 3.0 GHz , PM9624
NOTE: Before beginning any adjustments, the HF input must
have been in operation for at least one minute to let it
reach normal operating temperature.
Setup
– Connect the counter to line power.
– Switch on the counter.
– Press PRESET, then press ENTER.
– Connect the signal generator to the HF input.
Adjustment
– Turn the potentiometer R61, (see Fig. 6-5) fully counterclock-
wise.
– Check that the GATE indicator stops blinking.
– Turn R61 slowly clockwise until the GATE indicator starts
blinking.
The input frequency, 800 ± 25 MHz, will now be displayed.
To verify the 3.0 GHz HF input, a sweep frequency synthesizer is
needed. Also refer to Chapter 2 - Performance Check: Options,
Prescaler.
GPIB Interface, PM9626B
Setup
– Connect the counter to line power.
– Switch on the counter.
– Press PRESET, then press ENTER.
– Connect the DMM to the BNC output of the analog output.
– Activate the analog output.
– Select AUX MENU.
– Press DATA ENTRY UP/DOWN keys until the displayreads ANALOG OUT.
– Press ENTER.
– Press DATA ENTRY UP/DOWN keys to select ON.
– Press ENTER.
– Press DATA ENTRY UP/DOWN keys to until the displayreads 1.0-3 V.
– Press ENTER.
– Connect the LF synthesizer to the A input of the counter.
The counter should read 1000.0xxxxx Hz.
Adjustment
– Adjust the trimmer ZERO (see Fig. 6-6) until the output volt-
age is 0 V ± 1 mV.
– Set the LF synthesizer to 999.90 Hz / 1 Vpp square wave.
The counter should read 999.9xxxxx Hz.
– Adjust the trimmer FULL SCALE (see figure 6-6) until the
output voltage is 4.980 V ± 3 mV.
– Set the LF synthesizr to 100.01 Hz / 1 Vpp square wave.
The counter should read 100.0xxxxxx Hz.
– Check that the output voltage is 500 mV ± 5 mV.
6-6 Other Options
PM6685 Function FREQ C
Signal gener-ator
Frequency 800 ± 25 MHz
Amplitude 5.9 ± 0.5 mVrms
Table 6-9
HF
inp
ut
J1
9
R61
TP1TP9
Fig. 6-5 Test points and trimmers for the 3.0 GHz HFinput.
U109
U101U106
BU
101
U103Zero
GPIB
BU102BU103
Full Scale
U1
07
U1
11
U1
08
U113
U116
U117
U114 U115
Fig. 6-6 Trimmers for the GPIB interface.
PM6685 Input A 50 / AC / Manual trigger levels
LF synthe-
sizer
Amplitude 1 Vpp
Period 1000.01 Hz square wave
Table 6-10
Chapter 7
Replacement Parts
Introduction
7.2 Replacement Parts, Introduction
Standard Parts
Electrical and mechanical replacement parts can be obtained through
your local Fluke organization or representative. However, many of the
standard components can be obtained from other local suppliers. Before
purchasing or ordering replacement parts, check the parts list for part
number, value, tolerance, rating, and description.
If the value of the physical component differs from what is described in
the parts list, you should always replace the part with the same value as
originally mounted.
Standard parts are unmarked or marked with an ‘S’ in the column of
the parts lists.
Special Parts
In addition to standard electronic components, the following special
components are used:
– Components that are manufactured or selected by the manufac-turer to meet specific performance requirements.
– Components that are important for the safety of the instrument.
Both types of components may be replaced only by components ob-
tained through your local Fluke organization.
NOTE: Physical size and shape of a component may af-fect the performance of the instrument, particularly at
high frequencies. Always use direct replacements un-less it is known that a substitute will not degrade the
performance of the instrument.
These parts are ‘Recommended Replacement Parts’ and are marked
with an ‘R’ in the column of the parts lists.
Components marked with a ‘P’ in the column are ‘Production items’
not kept in replacement parts stock. These items can be ordered, but the
delivery time is longer than for normal replacement parts.
Mechanical Parts
Pos Description Part Number P
PCA 1, Main board 4031 100 65420 P
PCA 2, Front board 4031 100 48250 P
13 Stand-off, plastic 5322 532 12746 R
18 Textplate kit 4031 100 62430 R
20 Rubber keypad 4031 100 62720 R
22 Cover and Front panel 4031 100 49570 R
25 Rear panel 5322 447 31085 P
34 Profile-support 5322 460 60542 P
35 Profile-support 4031 100 53210 P
38 Shield cover 5322 447 91931 P
39 Shield cover 5322 462 50459 P
50 Rearfoot, cabinet, m-90 5322 462 41719 R
52 Bottom foot, cabinet, m-90 5322 462 41554 R
53 Bracket, cabinet 5322 401 11422 R
54 Spring, cabinet 5322 492 63808 R
Pos Description Part Number P
56 Rubber foot, sj-5018 black 5322 462 44434 R
58 Tilting support 5322 401 11471 R
62 Coax connector 5322 267 10004 S
63 Coax connector 5322 265 10264 R
64 Soldering tag, 9.6X15/15 ms fs 5322 290 30318 S
67 Toroid core 30nh rcc9/6/3 4c65 violet 5322 526 10545 P
68 Bottom shield 5322 447 91829 P
70 BNC holder 4031 100 48830 P
84 Mains filter 1a fs3514-1/07 5322 121 42352 R
90 PCA guide for prescaler 5322 401 11347 P
92 Stand-off nut M3x14 4031 100 48800 P
100 Washer, 4.0X10x2 pa6-6 5322 532 52364 P
102 Washer, 9.5X13x2.3 4822 532 10222 P
104 BNC plate, 25.4X25.4 5322 466 82868 P
110 Insulate plate 5322 466 61932 P
122 Shielding strip 610mm 99-210self-adhesive
5322 466 62077 P
150 Screw, mrt-kombi 3x06, stfz 4822 502 11658 P
152 Screw, mrt-kombi 3x08, stfz 5322 502 21489 P
156 Screw, mrt-kombi 4x16, stfz 5322 502 21491 P
160 Screw, mft-tt 3x08 stfzb tx 4822 502 11713 P
Replacement Parts, Mechanical Parts 7-3
Pos Description Part Number P
161 Screw, mfx-tt 3x08 st fz poz 4822 502 11713 P
164 Screw, mft-tt 4x12 stfzb tx 5322 502 13553 P
166 Screw, mrt-tt 3x08 stfzb tx 4822 502 11691 P
168 Screw, mrt-tt 4x16 stfzb tx 5322 502 13552 P
172 Screw, mft 4x10 st fzb, tx 5322 502 13641 P
176 Screw, rtk-ko st3.5X10 stfz 5322 502 30703 P
180 Spring washer, kba 3.2 St fz din137 4822 530 80173 P
Pos Description Part Number P
182 Spring washer, kba 4.3 St fz din137 4822 530 80076 P
184 Lock washer, yt4.3 St fz din6798a 4822 530 80083 P
190 Nut, m6m 04 st fzb 4822 505 10326 P
200 Receptacle, 140825-2, 2.8X0.8 5322 268 10275 P
201 Protect sleeve 2.8mm N 94610 transppa
5322 321 40117 P
202 Cable clip, reel srb-2.5T-m4 5322 358 50107 P
7-4 Replacement Parts, Mechanical Parts
Replacement Parts, Mechanical Parts 7-5
80
Lug bent 15° to lock
Main Board
Pos Description Part No.
227 CHOKE 4S2 3.5X6MM BANDAD 80ohm at 100MHz 5322 157 61928 S
B1 CRYSTAL 12.000 MHz SMD MA-406 2422 543 01353 P
B2 CRYSTAL 10 MHz HC-49U/13 5322 242 82118 P
C1 CAPACITOR-TRIM 0.5-2 pF 300V 5322 124 80335 S
C10 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C100 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C101 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C102 CAPACITOR 33 pF 5% 50V NP0 0805 2222 861 15339 S
C103 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C104 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C105 CAPACITOR 6.80 UF 20% 16V 6.0X3.2 MOLD 5322 124 10687 R
C106 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C107 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C108 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C109 CAPACITOR 22 pF 5% 50V NP0 0805 5322 122 32658 S
C11 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C110 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C111 CAPACITOR 15 UF 20%6.3V 6.0X3.2 MOLD 5322 124 11418 S
C112 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C113 CAPACITOR 82 pF 5% 50V NP0 0805 2222 861 15829 S
C114 CAPACITOR 100 pF 5% 50V NP0 0805 2222 861 15101 S
C115 CAPACITOR-TRIM 3-10 pF TZBX4Z100BB110 5322 125 50306 R
C116 CAPACITOR 47 pF 5% 50V NP0 0805 2222 861 15479 S
C117 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C118 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C119 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C12 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C120 CAPACITOR 10 pF 5% 50V NP0 0805 2222 861 15109 S
C121 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C122 CAPACITOR 680 pF 20% 63V NP0 1206 4822 126 12075 S
C123 CAPACITOR 47 pF 5% 50V NP0 0805 2222 861 15479 S
C124 CAPACITOR 100nF 20% 25V X7R 0805 5322 126 13638 S
C125 CAPACITOR 2.20 UF 20% 6.3V 3.2X1.6 MOLD 5322 124 10685 S
C126 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C127 CAPACITOR 1 nF 20% 50V X7R 0805 5322 122 34123 S
C128 CAPACITOR 82 pF 5% 50V NP0 0805 2222 861 15829 S
C129 CAPACITOR 6.8 pF 5% 50V NP0 0805 2222 861 15688 S
C13 CAPACITOR 47 pF 5% 50V NP0 0805 2222 861 15479 S
C130 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C131 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C132 CAPACITOR 2.20 UF 20% 6.3V 3.2X1.6 MOLD 5322 124 10685 S
C133 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C134 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C135 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C136 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C138 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C139 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C14 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C140 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C141 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C142 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C143 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C145 CAPACITOR 390 pF 5% 50V NP0 0805 4822 122 32636 S
C146 CAPACITOR 10 pF 5% 50V NP0 0805 2222 861 15109 S
C148 CAPACITOR 470 pF 1% 63V NP0 0805 5322 126 14051 S
C149 CAPACITOR 22 pF 5% 50V NP0 0805 5322 122 32658 S
C15 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C150 CAPACITOR 390 pF 5% 50V NP0 0805 4822 122 32636 S
C151 CAPACITOR 10 pF 5% 50V NP0 0805 2222 861 15109 S
C153 CAPACITOR 470 pF 1% 63V NP0 0805 5322 126 14051 S
C154 CAPACITOR 22 pF 5% 50V NP0 0805 5322 122 32658 S
Pos Description Part No.
C155 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C156 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C157 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C158 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C159 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C16 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C160 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C161 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C162 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C163 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C164 CAPACITOR 2.20 UF 20%6.3V 3.2X1.6 MOLD 5322 124 10685 S
C165 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C166 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C167 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C168 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C169 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C17 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C170 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C171 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C172 CAPACITOR 2.20 UF 20% 6.3V 3.2X1.6 MOLD 5322 124 10685 S
C173 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C174 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C175 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C176 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C177 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C178 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C179 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C18 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C180 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C181 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C182 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C183 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C184 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C185 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C186 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C19 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C2 CAPACITOR-TRIM 2.0-18 pF 300V 2222 809 05217 R
C20 CAPACITOR 1 nF 20% 50V X7R 0805 5322 122 34123 S
C21 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C22 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C23 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C24 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C25 CAPACITOR 10 pF 5% 50V NP0 0805 2222 861 15109 S
C26 CAPACITOR 10 pF 5% 50V NP0 0805 2222 861 15109 S
C27 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C28 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C29 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C3 CAPACITOR 22 nF 10% 200V X7R 1206 5322 126 14081 R
C30 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C31 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C32 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C33 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C34 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C35 CAPACITOR 470 nF 10% 25V X7R 1210 4822 126 12549 S
C36 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C37 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C38 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C39 CAPACITOR 6.80 UF 20% 16V 6.0X3.2 MOLD 5322 124 10687 R
C4 CAPACITOR 3.3 pF ±0.25pF 50V NP0 0805 2222 861 15338 S
C40 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C41 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
7-6 Replacement Parts, Main Board
Pos Description Part No.
C42 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C43 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C44 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C45 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C46 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C47 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C48 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C49 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C5 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C50 CAPACITOR 2.20 UF 20% 6.3V 3.2X1.6 MOLD 5322 124 10685 S
C51 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C52 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C53 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C54 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C55 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C56 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C57 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C58 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C59 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C6 CAPACITOR 1 nF 20% 50V X7R 0805 5322 122 34123 S
C60 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C61 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C62 CAPACITOR 2.20 nF PME289MA4220MR04 5322 121 43756 S
C63 CAPACITOR 2.20 nF PME289MA4220MR04 5322 121 43756 S
C64 CAPACITOR 270 µF 20% SMG 400V 25X45 5322 124 80334 S
C65 CAPACITOR 100 nF 20% 250V 2222 336 20104 S
C66 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C67 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C68 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C69 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C7 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C70 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C71 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C72 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C73 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C74 CAPACITOR 68 µF 20% 6.3V SOLID AL 5322 124 10455 S
C75 CAPACITOR 33 µF 20% 63V RADIAL 2M 6.3x11 2222 037 90074 S
C76 CAPACITOR 33 µF 20% 63V RADIAL 2M 6.3x11 2222 037 90074 S
C77 CAPACITOR 10 pF 5% 50V NP0 0805 2222 861 15109 S
C78 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C79 CAPACITOR 33 µF 20% 63V RADIAL 2M 6.3x11 2222 037 90074 S
C8 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C80 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C81 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C82 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C83 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C85 CAPACITOR 22 pF 5% 50V NP0 0805 5322 122 32658 S
C86 CAPACITOR 22 pF 5% 50V NP0 0805 5322 122 32658 S
C87 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C88 CAPACITOR 2.20 UF 20% 6.3V 3.2X1.6 MOLD 5322 124 10685 S
C89 CAPACITOR 100 pF 5% 50V NP0 0805 2222 861 15101 S
C9 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C90 CAPACITOR 100 pF 5% 50V NP0 0805 2222 861 15101 S
C91 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C92 CAPACITOR 15 UF 20% 6.3V 6.0X3.2 MOLD 5322 124 11418 S
C93 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C94 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C95 CAPACITOR 100 nF 20% 25V X7R 0805 5322 126 13638 S
C96 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C97 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C98 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
C99 CAPACITOR 10 nF 20% 50V X7R 0805 5322 122 34098 S
D1 DIODE 0.10A BAT18 35V 1PF SOT23 5322 130 32076 S
D10 DIODE 1A SB140 40V DO41 5322 130 81917 S
Pos Description Part No.
D12 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D13 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D14 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D15 DIODE BYD17G 400V 1.5A SOD87 9338 122 40701 R
D16 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D17 DIODE BYD17G 400V 1.5A SOD87 9338 122 40701 R
D18 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D19 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D2 DIODE 0.10A BAT18 35V 1PF SOT23 5322 130 32076 S
D21 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D22 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D23 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D24 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D25 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D26 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D3 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D4 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D5 DIODE 0.10A BAV99 SOT23 5322 130 34337 S
D6 DIODE 1A 1N4003/200 DO41 4822 130 31878 S
D7 DIODE 1A SB140 40V DO41 5322 130 81917 S
D8 DIODE 1A SB140 40V DO41 5322 130 81917 S
D9 BRIDGE RECTIFIER 2KBP08 2A 800V 5322 130 50474 S
F1 FUSE HOLDER 011 656 5X20mm 4822 256 30139 S
F1 FUSE 1.6A 5X20 T FST034.3119 4822 253 30024 S
J1 SOLDERING LUG 10.0X15/21 CU SN 4031 100 58390 P
J1 CONNECTOR-COAX BNC 5322 267 10004 S
J10 FLAT PIN 2.8mm E184/8 LESA SN BAND 5322 290 34064 S
J15 CONNECTOR 2 POL F095 SINGLE ROW 5322 265 44074 S
J15 CONNECTOR 2POL F095 JUMPER GREY 5322 263 50101 S
J16 CONNECTOR 2POL F095 JUMPER GREY 5322 263 50101 S
J16 CONNECTOR 3 POL F095 SINGLE ROW 5322 290 60445 S
J17 CABLE ASSY 5322 321 60669 R
J18 CONNECTOR 40 POL LOW PROFILE HEADER 5322 265 41051 S
J19 CONNECTOR 16 POL TMH-108-01-L-DW 5322 265 41013 S
J21 CONNECTOR 2POL F095 JUMPER GREY 5322 263 50101 S
J21 CONNECTOR 3 POL F095 SINGLE ROW 5322 290 60445 S
J22 CONNECTOR 2POL F095 JUMPER GREY 5322 263 50101 S
J22 CONNECTOR 3 POL F095 SINGLE ROW 5322 290 60445 S
J23 CONNECTOR 2POL F095 JUMPER GREY 5322 263 50101 S
J23 CONNECTOR 3 POL F095 SINGLE ROW 5322 290 60445 S
J24 CONNECTOR 10 POL 22-03-2101 4030-10A 5322 265 64028 S
J25 CONNECTOR 2POL F095 JUMPER GREY 5322 263 50101 S
J25 CONNECTOR 3 POL F095 SINGLE ROW 5322 290 60445 S
J29 CONNECTOR 2POL F095 JUMPER GREY 5322 263 50101 S
J29 CONNECTOR 3 POL F095 SINGLE ROW 5322 290 60445 S
J3 FLAT PIN 2.8mm E184/8 LESA SN BAND 5322 290 34064 S
J30 CONNECTOR 2POL F095 JUMPER GREY 5322 263 50101 S
J30 CONNECTOR 3 POL F095 SINGLE ROW 5322 290 60445 S
J32 CONNECTOR 20 POL LOW PROFILE HEADER 5322 265 51296 S
J4 FLAT PIN 2.8mm E184/8 LESA SN BAND 5322 290 34064 S
J5 FLAT PIN 2.8mm E184/8 LESA SN BAND 5322 290 34064 S
J6 FLAT PIN 2.8mm E184/8 LESA SN BAND 5322 290 34064 S
J7 CONNECTOR 2 POL F095 SINGLE ROW 5322 265 44074 S
J9 FLAT PIN 2.8mm E184/8 LESA SN BAND 5322 290 34064 S
K1 RELAY REED 5V PRMA-15157-3790 5322 280 20489 R
K2 RELAY REED 5V PRMA-15157-3790 5322 280 20489 R
K3 RELAY REED 5V PRMA-15157-3790 5322 280 20489 R
K4 RELAY TQ2-5 SV/1A 2pol vx 14X9X5m 5322 280 20514 R
K5 RELAY 2p vx V23042-A1003-B101 (alt.A2303) 5322 280 60557 R
L1 CHOKE 220 UH 10% NL453232T-221K 5322 157 61918 S
L10 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L11 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
Replacement Parts, Main Board 7-7
Pos Description Part No.
L12 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L13 CHOKE 4.70µH 5% LQH1N4R7J 2422 535 94048 P
L14 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L15 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L16 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L17 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L18 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L19 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L2 CHOKE 4S2 3.5X6MM BANDAD 80ohm at 100MHz 5322 157 61928 P
L20 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L21 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L22 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L23 CHOKE 4S2 3.5X6MM BANDAD 80ohm at 100MHz 5322 157 61928 P
L24 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L25 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L3 CHOKE 4S2 3.5X6MM BANDAD 80ohm at 100MHz 5322 157 61928 S
L4 FILTER-EMI BLM21A102SPT Z=1Kohm 0.2A
R=0.6ohm
2422 549 43133 P
L5 CHOKE 4S2 3.5X6MM BANDAD 80ohm at 100MHz 5322 157 61928 S
L6 CHOKE 10mH B82722-J2102-N1 1A 5322 157 70143 S
L7 CHOKE 10.00µH NEWPORT 18R103 2422 536 00061 P
L8 CHOKE 10.00µH NEWPORT 18R103 2422 536 00061 P
L9 CHOKE 33µH TSL0809-330K1R2 5322 157 53568 S
Q1 TRANSISTOR BF513 .03A20V SOT23 4822 130 60686 S
Q10 TRANSISTOR 0.5A BC807-25 45V SOT23 5322 130 60845 S
Q11 TRANSISTOR 0.5A BC817-25 45V SOT23 4822 130 42804 S
Q12 TRANSISTOR BC847B .1A45V SOT23 4822 130 60511 S
Q13 TRANSISTOR BFG97 0.1A 15V SO223 4822 130 63069 S
Q14 TRANSISTOR BC847B .1A45V SOT23 4822 130 60511 S
Q15 TRANSISTOR BC857B .1A45V SOT23 5322 130 60508 S
Q16 TRANSISTOR BC847B .1A45V SOT23 4822 130 60511 S
Q17 TRANSISTOR 0.5A BC817-25 45V SOT23 4822 130 42804 S
Q2 TRANSISTOR 25 MA BFR92A 20V SOT23 5322 130 60647 S
Q24 TRANSI-NPN SMD BFG16A SOT223 1.5GHz 1W 9340 022 10701 R
Q27 TRANSI-NPN SMD BFG16A SOT223 1.5GHz 1W 9340 022 10701 R
Q28 TRANSISTOR BFT92 25MA 15V SOT23 5322 130 44711 S
Q29 TRANSISTOR BFS17 .05A 15V SOT23 5322 130 40781 S
Q3 TRANSISTOR BFS17 .05A 15V SOT23 5322 130 40781 S
Q30 TRANSISTOR BFT92 25MA 15V SOT23 5322 130 44711 S
Q31 TRANSISTOR BFS17 .05A 15V SOT23 5322 130 40781 S
Q32 TRANSISTOR BFS17 .05A 15V SOT23 5322 130 40781 S
Q33 TRANSISTOR BFS17 .05A 15V SOT23 5322 130 40781 S
Q34 TRANSISTOR BFS17 .05A 15V SOT23 5322 130 40781 S
Q35 TRANSISTOR BFS17 .05A 15V SOT23 5322 130 40781 S
Q36 TRANSISTOR BSR12 0.1A 15V SOT23 5322 130 44743 S
Q37 TRANSISTOR BSR12 0.1A 15V SOT23 5322 130 44743 S
Q38 TRANSISTOR BFS17 .05A 15V SOT23 5322 130 40781 S
Q39 TRANSISTOR BFS17 .05A 15V SOT23 5322 130 40781 S
Q4 TRANSI-HF N SMD BFR93A 35mA 12V SOT23 5322 130 60705 S
Q5 TRANSISTOR BCP51 1.5A 45V SOT223 5322 130 62639 S
Q6 TRANSISTOR BC847B .1A45V SOT23 4822 130 60511 S
Q7 TRANSISTOR 0.5A BC807-25 45V SOT23 5322 130 60845 S
R1 RESISTOR 47 ohm 1% 0.125W 100PPM 1206 5322 116 80448 S
R10 RESISTOR 120 ohm 1% 0.125W 100PPM 1206 4822 051 10121 S
R100 RESISTOR 27 ohm 1% 0.1W 100PPM 0805 4031 002 27090 S
Pos Description Part No.
R101 RESISTOR 4.7 kohm 1% 0.125W 100PPM 1206 4822 051 54702 S
R105 RESISTOR 1.00 kohm 1% 0.125W 100PPM 1206 4822 051 51002 S
R106 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R107 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R108 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R109 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R11 RESISTOR 120 ohm 1% 0.125W 100PPM 1206 4822 051 10121 S
R110 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R111 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R112 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R113 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R115 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R116 RESISTOR 15.0 kohm 1% .125W 100PPM 1206 5322 116 82261 S
R117 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R118 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R119 RESISTOR 1.00 kohm 1% 0.125W 100PPM 1206 4822 051 51002 S
R12 RESISTOR 120 ohm 1% 0.125W 100PPM 1206 4822 051 10121 S
R121 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R122 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R123 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R124 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R125 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R126 RESISTOR 1.00 kohm 1% 0.125W 100PPM 1206 4822 051 51002 S
R127 RESISTOR 1.00 Mohm 1% 0.125W 100PPM 1206 4822 051 10105 S
R128 RESISTOR 1.50 kohm 1% 0.125W 100PPM 1206 4822 051 51502 S
R129 RESISTOR 470 ohm 1% .125W 100PPM 1206 4822 051 54701 S
R13 RESISTOR 120 ohm 1% 0.125W 100PPM 1206 4822 051 10121 S
R130 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R131 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R132 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R133 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R134 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R135 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R136 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R137 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R138 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R139 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R14 RESISTOR 120 ohm 1% 0.125W 100PPM 1206 4822 051 10121 S
R140 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R141 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R142 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R143 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R144 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R145 RESISTOR 330 ohm 1% .125W 100PPM 1206 4822 051 53301 S
R146 RESISTOR 15.0 kohm 1% .125W 100PPM 1206 5322 116 82261 S
R147 RESISTOR 2.20 kohm 1% .125W 100PPM 1206 4822 051 52202 S
R148 THERMISTOR 16.0 20% 3.5A S236/16 5322 116 30457 S
R149 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R15 RESISTOR 150 ohm 1% 0.125W 100PPM 1206 4822 051 51501 S
R150 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R151 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R152 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R153 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R154 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R155 RESISTOR 330 ohm 1% .125W 100PPM 1206 4822 051 53301 S
R158 RESISTOR 120 ohm 1% 0.1W 100PPM 0805 5322 117 12506 S
R159 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R16 RESISTOR 150 ohm 1% 0.125W 100PPM 1206 4822 051 51501 S
R160 RESISTOR 390 ohm 1% .125W 100PPM 1206 4822 051 53901 S
R161 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R162 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R163 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R164 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R165 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
7-8 Replacement Parts, Main Board
Pos Description Part No.
R166 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R167 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R168 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R169 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R17 RESISTOR 27.0 ohm 1% .125W 100PPM 1206 5322 116 82262 S
R170 RESISTOR 2.20 kohm 1% .125W 100PPM 1206 4822 051 52202 S
R171 RESISTOR 2.20 kohm 1% .125W 100PPM 1206 4822 051 52202 S
R172 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R173 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R174 RESISTOR 330 ohm 1% .125W 100PPM 1206 4822 051 53301 S
R175 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R176 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R177 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R178 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R179 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R18 RESISTOR 68.0 kohm 1% .125W 100PPM 1206 4822 051 56803 S
R180 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R181 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R182 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R183 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R184 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R185 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R186 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R187 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R188 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R189 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R19 RESISTOR 22.0 kohm 1% .125W 100PPM 1206 4822 051 52203 S
R190 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R191 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R193 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R194 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R195 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R196 RESISTOR 120 ohm 1% 0.1W 100PPM 0805 5322 117 12506 S
R197 RESISTOR 120 ohm 1% 0.1W 100PPM 0805 5322 117 12506 S
R198 RESISTOR 4.70 kohm 1% .125W 100PPM 1206 4822 051 54702 S
R199 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R2 RESISTOR 100 ohm 1% 0.125W 100PPM 1206 4822 051 51001 S
R20 RESISTOR 8.20 kohm 1% .125W 100PPM 1206 4822 051 10822 S
R200 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R201 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R202 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R203 RESISTOR 560 ohm 1% .125W 100PPM 1206 4822 051 10561 S
R204 RESISTOR 2.20 kohm 1% .125W 100PPM 1206 4822 051 52202 S
R205 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R206 RESISTOR 5.60 kohm 1% .125W 100PPM 1206 4822 051 10562 S
R207 RESISTOR 1.00 kohm 1% 0.125W 100PPM 1206 4822 051 51002 S
R209 RESISTOR 560 ohm 1% .125W 100PPM 1206 4822 051 10561 S
R21 RESISTOR 15.0 ohm 1% .125W 100PPM 1206 4822 051 10159 S
R211 RESISTOR 1.00 Mohm 1% 0.125W 100PPM 1206 4822 051 10105 S
R217 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R218 RESISTOR 680 ohm 1% .125W 100PPM 1206 4822 051 56801 S
R219 RESISTOR 330 kohm 1% .125W 100PPM 1206 5322 117 10969 S
R22 RESISTOR 220 kohm 1% .125W 100PPM 1206 4822 051 52204 S
R220 SENSOR-TEMP KTY82/120 5322 130 10682 S
R222 RESISTOR 180 kohm 1% .125W 100PPM 1206 4822 051 51804 S
R23 RESISTOR 220 kohm 1% .125W 100PPM 1206 4822 051 52204 S
R230 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R233 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R235 RESISTOR 120 ohm 1% 0.1W 100PPM 0805 5322 117 12506 S
R24 RESISTOR 470 kohm 1% .125W 100PPM 1206 5322 116 80447 S
R241 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R242 RESISTOR 680 ohm 1% 0.125W 100PPM 1206 4822 051 56801 S
R243 RESISTOR 18.0 kohm 1% .125W 100PPM 1206 5322 117 10034 S
R244 RESISTOR 82 ohm 1% .125W 100PPM 1206 4822 051 10829 S
Pos Description Part No.
R245 RESISTOR 3.90 kohm 1% .125W 100PPM 1206 4822 051 53902 S
R247 RESISTOR 820 ohm 1% .125W 100PPM 1206 5322 116 82264 S
R248 RESISTOR 680 ohm 1% .125W 100PPM 1206 4822 051 56801 S
R249 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R25 RESISTOR 470 kohm 1% .125W 100PPM 1206 5322 116 80447 S
R251 RESISTOR 1.00 kohm 1% 0.125W 100PPM 1206 4822 051 51002 S
R252 RESISTOR 100 ohm 1% .125W 100PPM 1206 4822 051 51001 S
R253 RESISTOR 560 ohm 1% 0.125W 100PPM 1206 4822 051 10561 S
R254 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R255 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R258 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R259 RESISTOR 680 ohm 1% .125W 100PPM 1206 4822 051 56801 S
R26 RESISTOR 470 kohm 1% .125W 100PPM 1206 5322 116 80447 S
R260 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R261 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R262 RESISTOR 10.0 ohm 1% 0.125W 100PPM 1206 4822 051 10109 S
R263 RESISTOR 1.00 kohm 1% 0.125W 100PPM 1206 4822 051 51002 S
R264 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R265 RESISTOR 1.00 kohm 1% 0.125W 100PPM 1206 4822 051 51002 S
R266 RESISTOR 1.00 kohm 1% 0.125W 100PPM 1206 4822 051 51002 S
R267 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R268 RESISTOR 1.00 kohm 1% 0.125W 100PPM 1206 4822 051 51002 S
R269 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R27 RESISTOR 470 kohm 1% .125W 100PPM 1206 5322 116 80447 S
R270 RESISTOR 8.20 kohm 1% .125W 100PPM 1206 4822 051 10822 S
R271 RESISTOR 820 ohm 1% .125W 100PPM 1206 5322 116 82264 S
R272 RESISTOR 2.20 kohm 1% .125W 100PPM 1206 4822 051 52202 S
R273 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R274 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R275 RESISTOR 2.20 kohm 1% .125W 100PPM 1206 4822 051 52202 S
R276 RESISTOR 33.0 kohm 1% .125W 100PPM 1206 4822 051 53303 S
R277 RESISTOR 33.0 kohm 1% .125W 100PPM 1206 4822 051 53303 S
R278 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R279 RESISTOR 8.20 kohm 1% .125W 100PPM 1206 4822 051 10822 S
R28 RESISTOR 470 kohm 1% .125W 100PPM 1206 5322 116 80447 S
R280 RESISTOR 820 ohm 1% .125W 100PPM 1206 5322 116 82264 S
R281 RESISTOR 2.20 kohm 1% .125W 100PPM 1206 4822 051 52202 S
R282 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R283 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R284 RESISTOR 2.20 kohm 1% .125W 100PPM 1206 4822 051 52202 S
R285 RESISTOR 33.0 kohm 1% .125W 100PPM 1206 4822 051 53303 S
R286 RESISTOR 33.0 kohm 1% .125W 100PPM 1206 4822 051 53303 S
R287 RESISTOR 0 ohm JUMPER RC-01 1206 4822 051 10008 S
R288 RESISTOR 68 ohm 1% .125W 100PPM 1206 4822 051 10689 S
R288 RESISTOR 33.0 ohm 1% .125W 100PPM 1206 4822 051 10339 S
R289 RESISTOR 220 ohm 1% 0.1W 100PPM 0805 4031 002 22010 S
R29 RESISTOR 22.0 kohm 1% .125W 100PPM 1206 4822 051 52203 S
R290 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R291 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R292 RESISTOR 0 ohm JUMPER RC-01 1206 4822 051 10008 S
R293 RESISTOR 330 ohm 1% .125W 100PPM 1206 4822 051 53301 S
R294 RESISTOR 27 ohm 1% 0.1W 100PPM 0805 4031 002 27090 S
R295 RESISTOR 270 ohm 1% .125W 100PPM 1206 4822 051 10271 S
R296 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R297 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R298 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R3 RESISTOR 470 kohm 1% .125W 100PPM 1206 5322 116 80447 S
R30 RESISTOR 470 kohm 1% .125W 100PPM 1206 5322 116 80447 S
R300 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R301 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R302 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R303 RESISTOR 27 ohm 1% 0.1W 100PPM 0805 4031 002 27090 S
R304 RESISTOR 120 ohm 1% 0.1W 100PPM 0805 5322 117 12506 S
R305 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
Replacement Parts, Main Board 7-9
Pos Description Part No.
R306 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R307 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R309 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R31 POTENTIOMETER 100 kohm 3304X-1-104 5322 101 10841 S
R310 RESISTOR 27 ohm 1% 0.1W 100PPM 0805 4031 002 27090 S
R311 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R312 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R313 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R314 RESISTOR 120 ohm 1% 0.1W 100PPM 0805 5322 117 12506 S
R315 RESISTOR 820 ohm 1% .125W 100PPM 1206 5322 116 82264 S
R316 RESISTOR 2.20 kohm 1% .125W 100PPM 1206 4822 051 52202 S
R317 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R318 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R319 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R32 RESISTOR 470 kohm 1% .125W 100PPM 1206 5322 116 80447 S
R320 RESISTOR 56 ohm 1% .125W 100PPM 1206 4822 051 10569 S
R321 RESISTOR 10.0 ohm 1% 0.125W 100PPM 1206 4822 051 10109 S
R322 RESISTOR 10.0 ohm 1% 0.125W 100PPM 1206 4822 051 10109 S
R323 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R325 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R326 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R327 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R328 RESISTOR 27 ohm 1% 0.1W 100PPM 0805 4031 002 27090 S
R329 RESISTOR 120 ohm 1% 0.1W 100PPM 0805 5322 117 12506 S
R33 POTENTIOMETER 10 kohm 3304X-1-103 5322 100 11143 S
R330 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R331 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R34 RESISTOR 18.0 kohm 1% .125W 100PPM 1206 5322 117 10034 S
R35 RESISTOR 470 ohm 1% .125W 100PPM 1206 4822 051 54701 S
R36 RESISTOR 470 ohm 1% .125W 100PPM 1206 4822 051 54701 S
R37 RESISTOR 1.50 kohm 1% 0.125W 100PPM 1206 4822 051 51502 S
R38 RESISTOR 1.00 kohm 1% 0.125W 100PPM 1206 4822 051 51002 S
R39 RESISTOR 10 MOHM 10% 0.25W RC-01 1206 4822 051 10106 S
R4 RESISTOR 220 kohm 1% .125W 100PPM 1206 4822 051 52204 S
R40 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R41 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R42 RESISTOR 15.0 ohm 1% .125W 100PPM 1206 4822 051 10159 S
R43 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R44 RESISTOR 47 ohm 1% .125W 100PPM 1206 5322 116 80448 S
R45 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R46 RESISTOR 150 ohm 1% 0.125W 100PPM 1206 4822 051 51501 S
R47 RESISTOR 150 ohm 1% 0.125W 100PPM 1206 4822 051 51501 S
R48 RESISTOR 82 ohm 1% .125W 100PPM 1206 4822 051 10829 S
R49 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R5 RESISTOR 220 kohm 1% .125W 100PPM 1206 4822 051 52204 S
R50 RESISTOR 8.2 ohm 10% 0.25W RC-01 1206 4822 051 10828 S
R51 RESISTOR 2.70 kohm 1% .125W 100PPM 1206 4822 051 52702 S
R53 RESISTOR 2.20 kohm 1% .125W 100PPM 1206 4822 051 52202 S
R54 RESISTOR 560 ohm 1% .125W 100PPM 1206 4822 051 10561 S
R55 RESISTOR 560 ohm 1% .125W 100PPM 1206 4822 051 10561 S
R56 RESISTOR 390 ohm 1% .125W 100PPM 1206 4822 051 53901 S
R57 RESISTOR 15.0 kohm 1% .125W 100PPM 1206 5322 116 82261 S
R58 RESISTOR 120 ohm 1% 0.125W 100PPM 1206 4822 051 10121 S
R6 RESISTOR 47 ohm 1% .125W 100PPM 1206 5322 116 80448 S
R60 RESISTOR 4.70 kohm 1% .125W 100PPM 1206 4822 051 54702 S
R61 RESISTOR 220.0 ohm 1% .125W 100PPM 1206 4822 051 52201 S
R63 RESISTOR 6.80 kohm 1% .125W 100PPM 1206 4822 051 10682 S
R64 RESISTOR 1.00 kohm 1% 0.125W 100PPM 1206 4822 051 51002 S
R65 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R66 RESISTOR 4.70 kohm 1% .125W 100PPM 1206 4822 051 54702 S
R67 RESISTOR 2.20 kohm 1% .125W 100PPM 1206 4822 051 52202 S
R69 POTENTIOMETER 100 kohm 3304X-1-104 5322 101 10841 S
R7 RESISTOR 120 ohm 1% 0.125W 100PPM 1206 4822 051 10121 S
R70 POTENTIOMETER 100 kohm 3304X-1-104 5322 101 10841 S
Pos Description Part No.
R71 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R72 RESISTOR 100 kohm 1% 0.125W 100PPM 1206 4822 051 51004 S
R73 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R74 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R75 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R76 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R77 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R78 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R79 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R8 RESISTOR 120 ohm 1% 0.125W 100PPM 1206 4822 051 10121 S
R80 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R81 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R82 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R83 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R84 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R85 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R86 RESISTOR 10.0 kohm 1% 0.125W 100PPM 1206 4822 051 51003 S
R87 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R88 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R89 RESISTOR 68 ohm 1% .125W 100PPM 1206 4822 051 10689 S
R9 RESISTOR 120 ohm 1% 0.125W 100PPM 1206 4822 051 10121 S
R90 RESISTOR 68 ohm 1% .125W 100PPM 1206 4822 051 10689 S
R91 POTENTIOMETER 100ohm CVR-4A-101 5322 101 10989 S
R92 RESISTOR 8.20 kohm 1% .125W 100PPM 1206 4822 051 10822 S
R93 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R94 RESISTOR 47 ohm 1% 0.1W 100PPM 0805 5322 117 12505 S
R95 RESISTOR 3.30 kohm 1% .125W 100PPM 1206 4822 051 53302 S
R96 RESISTOR 1.80 kohm 1% .125W 100PPM 1206 4822 051 10182 S
R98 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
R99 RESISTOR 100 ohm 1% 0.1W 100PPM 0805 5322 117 12497 S
U1 IC-OP AMP CA3140AM CA3140 AM BIMOS SO8 9322 114 39682 R
U10 IC-ANA TL7705BCD SMD LOW VOLT DETECT 5322 209 90426 R
U11 IC MICROP N80C196KB10 5322 209 52203 R
U12 IC-PROM 24LC16B 16kBIT I2C SMD SO8 9322 186 14682 P
U13 IC PC74HC574T SO20 4822 209 60451 S
U14 IC PC74HC573T SO20 5322 209 60424 S
U15 IC PC74HC02T SO-14 5322 209 71563 S
U16 IC PC74HC573T SO20 5322 209 60424 S
U17 IC PC74HC573T SO20 5322 209 60424 S
U18 IC PC74HC21T SO14 5322 209 60437 S
U19 IC PC74HC00T SO14 5322 209 71802 S
U2 IC PC74HC574T SO20 4822 209 60451 S
U20 IC PC74HC138T SO16 5322 209 73178 S
U21 IC NE532D DUAL SO-8 5322 209 71553 R
U22 IC-SRAM TC55257DFL-85L SOP28 32Kx8 9322 106 65682 R
U23 IC-PROM PM6685 27C512 5322 209 31776 P
U23 IC SOCKET 32 POL P/N 213-032-602 5322 255 41141 S
U24 IC PC74HC32T SO14 4822 209 63475 S
U25 IC PC74HC32T SO14 4822 209 63475 S
U26 IC-CMOS 74HC10 SO14 SO-14 9337 142 80653 S
U27 IC-DIG ECL 100331QC 3XDFLIP-FLOP PCC28 5322 209 33604 S
U28 IC-BUS TRANSCEIV 75ALS176D SO-8 SMD 5322 209 33171 R
U29 IC-ASIC 5322 209 90513 R
U3 IC PC74HC4353T SO20 4822 209 62805 S
U30 IC PC74HC00T SO14 5322 209 71802 S
U31 IC-OMV ADC 10BIT ADC1061C1WM SO20 9322 187 55682 R
U32 IC PC74HC573T SO20 5322 209 60424 S
U34 IC PC74HC00T SO14 5322 209 71802 S
U35 IC-OMV ADC 10BIT ADC1061C1WM SO20 9322 187 55682 R
U36 IC PC74HC573T SO20 5322 209 60424 S
U38 IC NE532D DUAL SO-8 5322 209 71553 S
U39 POWER MODULE 5322 693 22828 R
U4 IC 8 BIT PM7528HPC PLCC20 4822 209 62803 S
U40 IC HEF4013BT SO14 5322 209 14477 S
7-10 Replacement Parts, Main Board
Pos Description Part No.
U41 INSULAT.PLATEP TO220 CLIP Sil-Pad 400AC 5322 466 61813 P
U41 CLAMP TO220 5322 401 11257 P
U41 IC 12V LM2940CT-12 TO220 4822 209 62085 S
U43 INSULAT.PLATEP TO220 CLIP Sil-Pad 400AC 5322 466 61813 S
U43 CLAMP TO220 5322 401 11257 P
U43 IC 1.50 A LM337T TO-220 5322 209 81236 S
U44 IC-CMOS 74HC125 SMD SO14 9337 569 90701 S
U5 IC NE532D DUAL SO-8 5322 209 71553 S
U50 IC-COMP MAX961 SO8 4.5ns 9322 194 34682 R
U6 IC NE532D DUAL SO-8 5322 209 71553 S
U7 IC NE532D DUAL SO-8 5322 209 71553 S
U8 IC-COMP AD96687BP PLCC20 4822 201 62795 R
U9 IC-DIG ECLIPS MC10E104 4822 209 31775 R
Replacement Parts, Main Board 7-11
7-12 Replacement Parts, Front Board
Front Board
Pos Description Part Number
5 Connector row, SG0.25x100x6.0x3.0 5322 267 70294 R
7 LCD Display 5322 214 91033 R
10 LCD bezel 4031 100 62820 R
11 Backlight-LED 5322 130 82201 R
14 Window LCD 5322 381 11136 P
16 LED spacer, LEDS1E-3-01 for led 5322 255 41228 P
20 Rubber keypad 4031 100 62720 R
32 Screw, RX-PT Z 2-28X8 FZB 4822 502 30081 P
C201 Capacitor 10 nF 20% 50V X7R, 0805 5322 122 34098 S
C202 Capacitor 10 nF 20% 50V X7R, 0805 5322 122 34098 S
D201 LED 3 mm HLMP-1300 red 5322 130 81921 R
Pos Description Part Number
D202 LED 3mm Yellow 590nm
4-8MCD/10mA
4822 130 30953 R
P204 Connector 40 POL TMH-120-01-L-DW 5322 265 51295 P
R201 Resistor 220 k 1% .125W 100PPM
1206
4822 051 52204 S
R204 Resistor, 10.0 1% 0.125W 1206 4822 051 10109 S
R205 Resistor, 10.0 1% 0.125W 1206 4822 051 10109 S
R206 Resistor, 10.0 1% 0.125W 1206 4822 051 10109 S
R207 Resistor, 10.0 1% 0.125W 1206 4822 051 10109 S
U201 IC, PCF8576T, VSO56 5322 209 11129 R
U202 IC, PCF8576T, VSO56 5322 209 11129 R
ORIENTATION MARK FOR LCD
TORQUE 3 Ncm
TIGHTEN THIS SCREW FIRST TO GUIDE LCD HOLDER
GPIB Interface (PM9626B)
Pos Description Part Number
Connector, KC-79-35 5322 267 10004 S
IC-Socket, 40pin, DIL 5322 255 44217 S
Lock Washer, YT3.2 ST FZ DIN6798A 4822 530 80082 P
Screw, MRT-KOMBI 3X08, STFZ 5322 502 21489 P
Screw, MRT-KOMBI 3X10, STFZ 5322 502 21644 P
Spring Washer, KBA 3.2 ST FZ
DIN137
4822 530 80173 P
BU101 Cable Assy 5322 321 61341 P
BU103 Connector 24pin
57LE-20240-77OOD35G
5322 267 60148 P
C101 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C102 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C103 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C104 Capacitor 220 pF 5% 50V NP0 0805 4822 122 33575 S
C105 Capacitor 100 nF 10% 63V X7R 1206 4822 122 33496 S
C106 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C107 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C108 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C109 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C110 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C111 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C112 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C113 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C114 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C115 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C116 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C117 Capacitor 10 nF 20% 50V X7R 0805 5322 122 34098 S
C118 Capacitor 68 F 20% 6.3V SOLID AL 5322 124 10455 S
IC101 IC PC74HC32T SO14 4822 209 63475 S
IC103 IC NE532D DUAL SO-8 5322 209 71553 R
IC106 IC PC74HC00T SO14 5322 209 71802 S
IC107 IC PC74HC573T SO20 5322 209 60424 S
IC108 IC PC74HC573T SO20 5322 209 60424 S
IC109 IC socket 32pin P/N 213-032-602 5322 255 41141 S
IC109 IC-PROM PM9626B 5322 209 51853 R
IC111 IC-SRAM TC55257DFL-85L SOP2832Kx8
9322 106 65682 R
IC113 IC-DIG UPD7210D IEC BUS GPIBCONTROLLER
9322 023 60682 R
IC114 IC SN75160AN 5322 209 81807 R
IC115 IC SN75161AN 5322 209 81842 R
IC116 IC PC74HC573T SO20 5322 209 60424 S
IC117 IC PC74HC86T SO-14 5322 209 71562 S
R101 Resistor 47 k 1% 1/8W 100PPM 1206 5322 116 80446 S
R102 Resistor 47 k 1% 1/8W 100PPM 1206 5322 116 80446 S
R103 Resistor 4.7 k 1% 1/8W 100PPM 1206 4822 051 54702 S
R104 Potentiometer 1k 3304X-1-102E 5322 101 11095 S
R105 Resistor 10 k 1% 1/8W 100PPM 1206 4822 051 51003 S
R106 Resistor 330 1% 1/8W 100PPM 1206 4822 051 53301 S
R107 Potentiometer 10 k 25% 0.1W
3304X-1-103
5322 100 11143 S
R108 Resistor 3.3 k 1% 1/8W 100PPM 1206 4822 051 53302 S
R109 Resistor 100 1% 1/8W 100PPM 1206 4822 051 51001 S
R110 Resistor 100 1% 1/8W 100PPM 1206 4822 051 51001 S
R111 Resistor 1 k 1% 1/8W 100PPM 1206 4822 051 51002 S
R112 Resistor 100 k 1% 1/8W 100PPM 1206 4822 051 51004 S
R113 Resistor 100 k 1% 1/8W 100PPM 1206 4822 051 51004 S
Pos Description Part Number
R114 Resistor 100 k 1% 1/8W 100PPM 1206 4822 051 51004 S
R115 Resistor 100 k 1% 1/8W 100PPM 1206 4822 051 51004 S
R116 Resistor 100 k 1% 1/8W 100PPM 1206 4822 051 51004 S
R117 Resistor 100 k 1% 1/8W 100PPM 1206 4822 051 51004 S
SK101 DIP switch 6-p 206-6 RAST 5322 277 21125 R
Replacement Parts, GPIB Interface (PM9626B) 7-13
This page is intentionally left blank.
7-14 Replacement Parts, GPIB Interface (PM9626B)
Chapter 8
Drawings & Diagrams
How to read the diagrams
This chapter contains circuit diagrams and component layout.
Each diagram has been completed with lists of the ICs used in the
unit. This list indicates the connections that are not shown in the dia-
gram, such as GND and supply voltages.
Signals
The signals in these units are named after what they do, e.g.,
LEAD-EDGE is used as control current to the leading edge circuits.
Two different types of arrows are used to mark references for contin-
ued connection somewhere else in the diagram.
This arrow is used if the reference is directed to a point
located on the same page.
This arrow is used if the reference is directed to a point
located on another page. The example means that the
point is on sheet 1, coordinate A1.
Circuit symbols
The circuit diagrams are computer drawn. The symbols conform to
the IEC standards. These symbols are designed to be logical and easy
to read.
The component number is written above the symbol.
Inside the symbol, at the top is an abbreviated description of the cir-
cuit’s function.
Pin numbers are written outside the symbol and, if it is a complex cir-
cuit, the pin functions are written inside.
A small circle on a pin indicates that the input/output inverts the sig-
nal.
The component name is written below the symbol.
The signal flow through the circuit is always from left to right.
Resistors, capacitors, diodes, transistorsand other components.
These components are similar to the old fashioned, hand-drawn sym-
bols.
They have their component number above and their value or compo-
nent name below.
Aresistor contained in a resistor network has a frame drawn around it
and one of the pin numbers is written to the left or below it.
Component numbers
“R305" is a typical component number. The ”R" indicates that it is a
resistor,"3" that it is positioned on the “unit 3", and 05 that it is the
fifth resistor in the component list for that unit.
Drawings & Diagrams 8-2
/1.A1
A1
This page is intentionally left blank.
Drawings & Diagrams 8-3
Main PCB, Component layout
8-4 Drawings & Diagrams
Top View
Control Logic, PCB 1, sheet 1(5)
Drawings & Diagrams 8-5
AR7AR6AR5AR4AR3AR2AR1AR0
AR1AR2
AR
0
AR
1
AR
3
AR
5
AR
6
AR
7A
D7
AD
6
AD
5
AD
4
AD
3
AD
2
AD
1
AD
0
AR
2
AR
4
AD0AD1AD2AD3AD4AD5AD6AD7AD8AD9
AD10AD11AD12AD13
AD0AD1AD2AD3AD4AD5AD6AD7
A0A1A2A3A4A5A6A7
ALE
A[0-15]
INST
A13
A9A10A11
A13
WAITSTATE
A8A9A10A11A12A13A14
AD7
AD0AD1AD2AD3AD4AD5AD6
A0A1A2A3A4A5A6A7
RD
WRL
CSKEYBOARD
CSKEYBOARDIN
AR[0-7]
AD13AD12AD11AD10AD9AD8
AR6AR5AR4AR3AR2AR1AR0
AR7
AD[0-15]
CS
KE
YB
O
AR
DO
UT
6MHz
CSROM
CSRAM
AD13AD12AD11AD10AD9AD8 A8
A9A10A11A12A13A14A15
AD0AD1AD2AD3AD4AD5AD6AD7
A0A1A2A3A4A5A6A7A8A9A10A11A12
A15A14
AD14
AD15
RAM/ROM
AD14
A15
AD15
A14
AD15
AD14
BUSWIDTH
RD
A8
WRL
CS
GP
IB
AR3
AR0
AR
[0-7
]
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+12V
-5.2V
+5V
+5CPU
+5CPU
+5V
+5V
-5.2V
+5V
U+12V
+5V
+5V
+1
2V
RE
G/B
AT
T
+5V
U+12V
+12VREG /BATT
+7V
+5V
+5V
+5CPU
-5.2V
+5V
+7V
+5V
U+12V
+12VREG /BATT
+7V
LO BATT
CSIA
CSASIC
DACMUX
CSRLY
CSDAC
A8
AR[0-7]
ALE
RD
WRL
DISABLE STANDBY
ENA-EXT-REF
CSIB
C
GET
12MHZ
AD[0-15]
BACKLIGHT
BURST CARRY 1CARRY 2
FIN
ON
STAND BY
-5.2V
TEST SIGNALS
TO GPIB
TO
DIS
PLA
Y/
KE
YB
OA
RD
TO PRESCALER
STAND BY IND.
TEST
RESET
GATE IND.
EEPROM
R178
56R17310K
R18556
U12B24LC16BG
ND
4V
CC
8
U20BHC138V
CC
16
GN
D8
U10
TL7705B
SENSE7
RESIN2
CT3
GND4
RESET5
RESET6
REF1
VCC8
R19510K
J13
U12A
24LC16B
SDA5
SCL6
A01
A12
A23
WP7
&
U26B
HC10
345
6
C9215uF-6.3V
&
U26C
HC10
91011
8
C95100nF
U13A
HC574
OE1
C111
Q019
Q118
Q217
Q316
Q415
Q514
Q613
Q712
D02
D13
D24
D35
D46
D57
D68
D79
U17BHC573V
CC
20
GN
D1
0
&
U19A
HC00
1
23
&
U18B
HC21
910
1213
8
R166100K
&
U26A
HC10
1213
12
C9910n
R20010K
R162100K
R174330
R160390
R19156
J14
J19
TMH-108- 01-L-DW
12345678910
131211
141516
B1
12MHz
R203560
1
U24C
HC32
9
108
C8522p
R18656
R1702.2K
R18256
R205
56
1
U25A
HC32
1
23
CPU
ADR
DATA
U11
80C196KB
XTAL167
XTAL266
RESET16
EA2
NMI3
AGND12
VREF13
VSS14
VPP37
READY43
BUSWIDTH64
ACH0/P0.06
ACH1/P0.15
ACH2/P0.27
ACH3/P0.34
ACH4/P0.411
ACH5/P0.510
ACH6/P0.68
ACH7/P0.79
P1.019
P1.120
P1.221
P1.322
P1.423
P1.530
P1.631
P1.732
TDX/P2.018
RDX/P2.117
EXTINT/P2.215
T2CLK/P2.344
T2RST/P2.442
PWM/P2.539
P2.633
P2.738
CLKOUT65
WR/WRL40
BHE/WRH41
RD61
ALE/ADV62
INST63
AD0/P3.060
AD1/P3.159
AD2/P3.258
AD3/P3.357
AD4/P3.456
AD5/P3.555
AD6/P3.654
AD7/P3.753
AD8/P4.052
AD9/P4.151
AD10/P4.250
AD11/P4.349
AD13/P4.547
AD14/P4.646
AD15/P4.745
AD12/P4.448
HSI.024
HSI.125
HSO.4/HSI.226
HSO.5/HSI.327
HSO.028
HSO.129
HSO.234
HSO.335
VSS68
VC
C1
VSS36
U22A
55257
CE20
A1021
OE22
A1123
A924
A825
A1326
R/W27
I/O111
I/O212
I/O313
I/O415
I/O516
I/O617
I/O718
I/O819
A141
A122
A010
A19
A28
A37
A46
A55
A64
A73
R167100K
&
U18A
HC21
12
45
6
C89100p
R17910K
R190
56
R201
10K
R163100K
C9610n
R17210K
R180
56
C101100nF
C100100nF
U24EHC32V
CC
14
GN
D7
&
U19B
HC00
4
56
C8622p
R18756
1
U15C
HC02
8
910
R175
10K
R176
56
C882.2uF-6.3V
R1712.2K
R159
10K
HC573
U16A
D02
D57
Q019
D35
OE1
Q514
Q316
Q613
D13
D68
D46
Q118
C111
Q415
Q217
D24
Q712
D79
U22B55257G
ND
14
VC
C2
8
R2042.2K
J29
1
2
3
R18356
U18CHC21V
CC
14
GN
D7
Q16BC847B
R168100K
C90100p
J30
1
2
3
U14BHC573V
CC
20
GN
D1
0
HC573
U14A
D02
D57
Q019
D35
OE1
Q514
Q316
Q613
D13
D68
D46
Q118
C111
Q415
Q217
D24
Q712
D79
L10
BLM21A102S
1
U15A
HC02
2
31
R164100K
HC573
U17A
D02
D57
Q019
D35
OE1
Q514
Q316
Q613
D13
D68
D46
Q118
C111
Q415
Q217
D24
Q712
D79
C9710n
U19EHC00V
CC
14
GN
D7
1
U24A
HC32
1
23
J17
Con40
12345678910111213141516171819202122232425262728293031323334353637383940
R181
56
C93100nF
Q15BC857B
R18856
1
U24D
HC32
12
1311
R177
56
J11
U23B27C512-90V
CC
32
GN
D1
6
R18456
R19410K
J18
Con40
123456789
10111213141516171819202122232425262728293031323334353637383940
R158
120
C9115uF-6.3V
R193
56
&
U19C
HC00
9
108
C94100nF
C87100nF
U20A
HC138
A01
A12
A23
Y015
Y114
Y213
Y312
Y411
Y5 10
Y6 9
Y7 7
E1A4
E2A5
E36
1
U15B
HC02
5
64
U16BHC573V
CC
20
GN
D1
0
1
U24B
HC32
4
56
R20210K
R165100K
C9810n
U23A
27C512-90JC
A152
A011
A110
A29
A38
A47
A56
A65
A74
A829
A928
A1024
A1127
A123
A1330
OE/VPP25
CE23
A1431
O013
O114
O215
O318
O419
O520
O621
O722
J12
&
U19D
HC00
12
1311
1
U15D
HC02
11
1213
R19910K
R161100K
U13BHC574V
CC
20
GN
D1
0
U15EHC02V
CC
14
GN
D7
U26DHC10V
CC
14
GN
D7
R169100K
R18956
Main PCB, Component layout
8-6 Drawings & Diagrams
Bottom View
K2
K1
K3
K4
+ --
Counter Circuits, PCB 1, sheet 2(5)
Drawings & Diagrams 8-7
AR0AR1AR2AR3
AR7
AD11AD12AD13
AR6
AD9AD8
AD10
AD15AD14
AR4AR5
+5M
+5M
+5M
+5V
+5V
+5V
+5M
+5ECL
+5V
+5M
+5M
+5ECL
-5ECL
+5ECL
-5ECL
-2ECL -2ECL
-2ECL -2ECL
-5ECL
+5ECL
-5ECL
-2ECL-2ECL
-5ECL
-2ECL
+5ECL
+5ECL
-5ECL
-5ECL
-5ECL
+5V
-5.2V
-5.2V
-5ECL
-2ECL
CSASIC
ALE
RD
WRL
GET
+12VREG/BATT
+5V
A
12MHZ
AD[0-15]
CARRY 2
CARRY 1
FIN
PXBPXASXBSXA
ENA-EXT-REF
BURST
AN
C
-2.1V
AR[0-7]
-5.2V
Externalcontrolinput(rear panel)
OscillatorselectionOscillator
selection
STD
STD
OPT
OPTO
PT
ION
AL
OS
CIL
LA
TO
R
Externalreferenceinput(rear panel)
Internalreferenceoutput(rear panel)
R230
100
R300
47
R512.7K
R268
1K
R31027
R208Not used
R249
47
C11115uF-6.3V
C177100nF
C14010n
J23
1
2
3
R265
1K
C18110n
R306220
BAV99D16
C107
10n
R312100
R248
680
C109
22p
R244
82
C18515uF-6.3V
J28BNC-Coax
Q39BFS17
C183
100nF
R2453.9K
Q37BSR12
U50
MAX961
+IN1
-IN2
SHDN3
LE4
VCC8
QN7
Q6
GND5
Q24BFG16A
L12
BLM21A102S
C142100nF
C18615uF-6.3V
EN
EN
U28
75ALS176D
34
21
67
5
8
U27C
100331
S21
C124
Q26
Q27
R23
1D25
R325
47
C122680pF
R211
1M
R32210
1
U25B
HC32
4
56
R302100
L17
BLM21A102S
U25EHC32V
CC
14
GN
D7
R329
R328
120
27
C131100nF
R235120
R260
47
U27A
100331
S11
C19
Q6
Q5
R10
1D7
R255
100
C114100p
C13915uF-6.3V
C176
100nF
C14110n
R326100
R266
1K
C13510n
R298
47
R305220
R315820
R311100
D15
BYD17G
C12882p
1
U25C
HC32
9
108
R323
47
C182100nF
C121100nF
Q34BFS17
C144Not Used
R327100
U27D100331
VC
C1
VC
CA
2V
EE
S8
VE
ES
15
VE
ES
22
VE
E1
4
MR16MS12
R267
100
C115
3-10pF
BAV99
D14
C120
10p
R233
47
R31356
R32110
Q27BFG16A
C10233pF
L15
BLM21A102S
C13410n
R314120
BNC-Coax
R217
100
R258
100
C13615uF-6.3V
TP28
R250Not used
R296220
C127
1n
C178
100nF
L11
BLM21A102S
R317220
R24110K
C12347p
C130
100nF
R2201K
B2
10MHz
R33047
R309
47
R3162.2K
BAV99D19
R32056
Q35BFS17
L14
BLM21A102S
R52
Not used
J27
BNC-Coax
R218680
1
U25D
HC32
12
1311
R219330K
Q32BFS17 C113
82p
R243
18K
C132
2.2uF-6.3V
COUNTER CIRCUIT
U29
57370
RTCX283
VBAT82
X246
PH252
MTCXO43
EXTREF48
MPCLK29
V+REFO41
V-REFO39
V+REFA54
V-REFA56
V+REFB58
V-REFB60
VREFAD88
IRES87
VCCN36
VCCB47
VCCC50
VCCE57
VCCD71
VCCG85
VCCA93
GNDA38
GNDB44
GNDC53
GNDE61
GNDD367
GNDD269
GNDD173
GNDD475
GNDG86
GET37
B268
A72
A274
B70
SR66
EXTC76
P65
BURST64
CS27
ALE26
WRL23
WRH24
RD25
HLDA99
QDMA28
RTCX184
ALARM81
X145
PH151
OUTMUX49
INTREF42
OTRIM40
VOUTA55
VOUTB59
INTP189
INTP290
INTS191
INTS292
FIN94
MTIME96
CY197
CY298
TRA62
TRB63
PG30
C180
C279
C378
C477
S131
S232
S333
S434
S535
INT95
HOLD100
A1619
A1720
A1821
A1922
AD02
AD13
AD24
AD35
AD46
AD57
AD68
AD79
AD810
AD911
AD1012
AD1113
AD1214
AD1315
AD1416
AD1517
GN
D
18
VC
C1
C7710p
L22
BLM21A102S
J25
1
2
3
R261
100
L21
BLM21A102S
L13
4.7uH
R297
C175
220
100nF
R303
R304
27
120
R2511K
U27B
100331
S17
C119
Q3
Q 4
R20
1D18
C179
100nF
Q38BFS17
R263
1K
R318220Q36
BSR12
R247
820
C116
47p
R254
10K
C11910n
C180100nF
R331
47
R307
47
R31956
C36100nF
R209
560
R242
R301100
C138
10n
L16
BLM21A102S
R97
Not used
BAV99
D18
C117100nF
R264220
R222180K
Q33BFS17
R259680
J24
4030-10A
123456789
10
D17
BYD17G
R26210
C184100nF
C110100 nF
C125
2.2uF-6.3V
C133
100n
C124100n
C143100nF
J26
R1014.7k
+5ECL
R252
100
C129
6.8p
R253
560
680
This page is intentionally left blank.
8-8 Drawings & Diagrams
Input Amplifier & Trigger Level DACs, PCB 1, Sheet 3(5)
Drawings & Diagrams 8-9
AR6
AR4
AR7
AR5
AR3AR2AR1
CSRLY
AR[0:7]
AR0AR1AR2
0.04V0.22V
0.59V1.6V
WRL
AR7AR6
AR5AR4AR3AR2AR1AR0
DACMUX
A8
AR0
-5.2
-5.2
+5
+7 +5
-5.2
-5.2
+5
+5D
+5
+5
-5.2
-5.2
-5.2
+5
+5
+5
-5.2
+7
-5.2L
-5.2
-5.2
-2.1
+5
-2.1
-2.1
-2.1
-2.1 -2.1-2.1
-2.1
-5.2
+5
-5.2
-5.2L
+5D
-5.2D
+5D
+5V
+5D
-5.2D
+5
-5.2
-2.1
-2.1
AR[0-7]
+7V
-5.2V
+5V
BACKLIGHT
A
CSRLY
CSDAC
WRL
A8
DACMUX
AN
-2.1V
TRIG LEVEL DAC'S
DAC RANGE REFERENCE
( U16 )
+
-
U5A
NE532D
2
31
R36470
R1727
BAV99D4
L5
4S2 3.5X6MM
K3A
REED
81
71
4
R928.2K
C4910n
R13120
R111100
U1B3140
V+
7
V-
4
R45
47
R26470K
Q11BC817-25
R11615K
R6510K C38
10n
R107100
R62Not used
C2510p
U5CNE532D
V+
8
V-
4
C910n
R604.7K
R3310K
R84
10K
Q13BFG97
C6810n
C4110n
K1B
REED
26
13
R4882
C5910n
K4B
87
9
R68Not used
R32470K
D1
BAT18
U8B
AD96687BP
LE17
LE15
+12
-13
OUT20
OUT 19
C1910n
L25
BLM21A102S
R88
100
U3
HC4353T
ACOM18
BCOM19
CCOM5
VEE9
A117
B11
B02
C06
C14
VCC20
GND10
E17
E28
LE11
A016
S015
S113
S212
C37100nF
R1922K
R23
220K
R80
10K
C2310n
U2BHC574V
CC
20
GN
D1
0
R72
100K
R114
C3210n
C5310n
+
-
U6B
NE532D
6
57
K1AREED
81
71
4
C1615uF-6.3V
C61n
R76
10K
BAV99
D5
C20
1n
R6
47
&U9C
10E104
2728 13
12
R961.8K
R30470K
C1
0.5-2pF
R3
470K
Q4BFR93A
R49100
+
-
U5B
NE532D
6
57
R8120
R112100
R1
47
TP10
C8010n
&
U9A
10E104
45 8
7
R11510K
R43100
R27470K
C3
22nF
TP26
C502.2uF-6.3V
R7120
R108100
C2610p
U6CNE532D
V+
8
V-
4
R37
1.5K
K2B
REED
26
13
C1010n
R9347
R11747
R85
10K
C6910n
C4210n C2710n
R119
1K
R46150
D2
BAT18
R664.7K
R69100K
C29
100nF
R81
10K
C2410n
K4A
34
2
C39
6.8u-16V
R636.8K
TP11
C5610n
C5410n
R34
18K
R15150
TP27
C45100nF
R44
47
R58120
R77
10K
C55100nF
C5
10n
L1
220uH
Q2BFR92A
R89
68
R208.2K
+
-U1A
3140
2
36
1 8 5
R73
10K
R10120
R113100
R21
15
R39 R10010M
R4047
27
R28470K
L23
4S2 3.5X6MM
+
-
U7A
NE532D
2
31
&U9B
10E104
23 10
9
U4
PM7258
CS15
WR16
DACA/DACB6
D014
D113
D212
D311
D410
D59
D68
D77
VREF A4
VREF B18
RFB A3
OUT A2
RFB B19
OUT B20
AGND1
VCC17
GND5
C1410n
C4810n
R9120
R109100
U7CNE532D
V+
8
V-
4
R91100
C1110n
R9447
R24470K
R4
220K
L4
BLM21A102S
R11847
R86
10K
C4310n
L24
BLM21A102S
U9F
10E104VE
E1
VC
C0
16
F219
VC
C11
F120
VC
C0
21
J1
C2810n
C710n
R31100K
C30100nF
U8A
AD96687BP
LE5
LE7
+10
-9
OUT2
OUT3
R82
10K
C3310n
C6610n K3B
REED
26
13
C5710n
L2
4S2 3.5X6MM
R70100K
R61220
R16150
C1710n
K4C
11
0
R78
10K
C2110n
K2A
REED
81714
R120Not used
L3
4S2 3.5X6MM
C13
47p
C5110n
R90
68
R672.2K
R98Not used
R641K
R74
10K
R12120
C2
2-18pF
R35470
BAV99
D3
R59Not used
R5715K
C1510n
R11120
R110100
R47150
R50
8.2
C43.3pF
C1210n
R25470K
R5
220K
C4715uF-6.3V
+
-
U6A
NE532D
2
31
R2922K
C4610n
C4410n
R1868K
Q1BF513
J8
MiniCoax-3
R106100
R41220
C810n
U2A
HC574
OE1
C111
Q019
Q118
Q217
Q316
Q415
Q514
Q613
Q712
D02
D13
D24
D35
D46
D57
D68
D79
&
U9D
10E104
2526 15
14
Q3BFS17
C12610n
C61
15uF-6.3V
R83
10K
C40100nF
C3410n
C6710n
R381K
C5810n
+
-
U7B
NE532D
6
57
R953.3K
C1810n
R87
100
&
U9E
10E104
2324 18
17
C60100nF
R2
100
R22
220K
R79
10K
C2210n
R71
100K
C3110n
C5210n
R1051K
J2
R99Not used
R4215
Q10BC807-25
R75
10K
U8CAD96687BPG
ND
4V
CC
14
VE
E8
GN
D1
8
R14120
8-10 Drawings & Diagrams
This page is intentionally left blank.
Power Supply, PCB 1, sheet 4(5)
Drawings & Diagrams 8-11
PF
+7V
U+12V
+5V
-5.2V
+5V
U+12V
U+12V
-5.2V
U+12V
U+12V
+12V
+12V
+12V
STAND BY
ON
DISABLE STANDBY
+12V
+12VREG/BATT
LO BATT
+5V
-5.2V
U+12V
+7V
SIGNAL GROUNDSAFETY EARTH
EXT. DCON REARPANEL OPTIONAL
FAN
TO BATTUNIT
DISCONNECT IFBATTERY OPTIONINSTALLED
To RubidiumPower
To RubidiumPower
R55
560
D20
BZX79-B5V6
D8
SB140
R152220
R1472.2K
+
-
U21B
NE532D
6
57
J9
R124
100K
R143220
12V+
-U__
U41
LM2940CT-12
132
C632.2nF
C84220uF-50V
R139220
R128
1.5K
C7010n
R1984.7K
J6
R135220
C10310n
-+
D9
2KBP08
J10
R131220
K5A
48
6
U21CNE532D
V+
8
V-
4
C10610n
L9
33uH
J32
Con20
1
23456789
101112131415161718
1920
D10
SB140
R12110K
C7468uF-6.3V
R153220
D6
1N4003/200
C8315uF-6.3V
R125
100K
R144220
R56390
R149220
BAV99D13
TP15
+5V
R1562.2K
R140220
C7110n
C10410n
R2065.6K
Q14BC847B
R136220
R196120
R532.2K
K5B
139
11
R129470
1.25V
+
-U__
U42
LM317T
3 21
R132220
U40CHEF4013BTV
CC
14
GN
D7
J15
TP16
+15V
S1DC1R
U40A
HEF4013BT
6534
21
F1
1.6AT
L6
10mH
R154220
9
99
U39
POWER MODULE
+6
-7
+8
-9
+10
+11
-13
-14
PF12
+DCIN1
-DCIN4
-DCIN5
C64270uF
J3
Q7
BC807-25
1.25V
REG
U43
LM337T
In2
Out3
Adj1
BAV99
D12
Q5BCP51
R150220
R1576.81K
R122
100K
J7
R141220
C7210n
TP23
TP17
-7V
J21
1
2
3
R1261K
+
-
U21A
NE532D
2
31
J16
1
2
3
R137220
R145330
J4
L7
10uH
R130220
S1DC1R
U40B
HEF4013BT
89
1110
1213
R2071K
R133220
R197
120
R146
15K
C65100n
K5C
11
6
C7533uF-63V
R54560
C8215uF-6.3V
D7
SB140
R151220
R123
100K
TP21
+12V
J31
R14816
R142220
C7933uF-63V
C7310n
R155330
TP22
+7V
C622.2nF
J22
1
2
3
R138220
Q17BC817-25
L8
10uH
Q12BC847B
R134220
C35
470n
TP20
Q6BC847B
R1271M
C1056.8u-16V
J5
C7633uF-63V
8-12 Drawings & Diagrams
This page is intentionally left blank.
Interpolators, PCB 1, sheet 5(5)
Drawings & Diagrams 8-13
VREF-VREF+
VREF+
VREF-
+5ADC
VREF-AR6AR5AR4
AR2
AD9AD8
AD[0-15]
AR7
AD[0-15]
AR4AR5
AR7AR6
AR3
AD9AD8
AR0
AR1
AR2
AR1
AR0
AR3VREF+
+5V
+12J
+5V
+12J
+5J
+5J
+5V
+5V
+5J
+12J
+5J
+5V
+12V
CSIA
CSIB
SXB
PXB
SXA
PXA
AD[0-15]
AR[0-7]
Q31BFS17
C153470pF
U44EHC125V
CC
14
GN
D7 C173
10n
R289220
10nC108
U44D
HC125
12 11
13
C167100nF
C168100nF
C154
22p
U34E U32B
HC00VC
C1
4
GN
D7
+
-
U38B
NE532D
6
57
BAV99D25
C159100nF
R290
100
C163100nF
R280820
C150390pF
R272
2.2K
C148470pF
R275
2.2K
HC573
U32A
D02
D57
Q019
D35
OE1
Q514
Q316
Q613
D13
D68
D46
Q118
C111
Q415
Q217
D24
Q712
D79
C147Not Used
R29147
27
HC573
U36A
D02
D57
Q019
D35
OE1
Q514
Q316
Q613
D13
D68
D46
Q118
C111
Q415
Q217
D24
Q712
D79
BFT92
Q28
L19
BLM21A102S
R283100
&
U30A
HC00
1
23
BAV99
D23
U44A
HC125
2 3
1
10nC112
U31A
ADC1061
INT 2
S/H3
RD4
CS5
VREF-7
VIN8
VREF+9
DB218
DB119
DB020
DB614
DB515
DB416
DB317
DB713
DB812
DB911
L20
BLM21A102S
C174100nF
R285
33K
C1642.2uF-6.3V
&
U34B
HC00
4
56
C15615uF-6.3V
R294
C149
22p
C16910n
10n
U44C
HC125
9 8
10
U35A
ADC1061
INT 2
S/H3
RD4
CS5
VREF-7
VIN8
VREF+9
DB218
DB119
DB020
DB614
DB515
DB416
DB317
DB713
DB812
DB911
U38CNE532D
V+
8
V-
4
&
U34D
HC00
12
1311
R2870
VC
C1
+V
CC
6
GN
D1
0
C152Not Used
&
U30D
HC00
12
1311
C15110p
R2708.2K
R284
2.2K
C16615uF-6.3V
R281
2.2K
BAV99
D26
C14610p
+
-
U38A
NE532D
2
31
C1722.2uF-6.3V
C15715uF-6.3V
R277
33K
R295270
R269220
U44B
HC125
5 6
4
U36BHC573HC573 V
CC
20
GN
D1
0
10nC78
R273
47
BAV99
D24
BAV99D21
R2920
U30EHC00V
CC
14
GN
D7
BFT92
Q30
BAV99
D22
C11810n
&
U30B
HC00
4
56
U35BADC1061
U31BADC1061 V
CC
1
+V
CC
6
GN
D1
0
R28833
R271820
R28633K
C16510n
R278
220
C145390pF
&
U34C
HC00
9
108
R293330
L18
BLM21A102S
C158100nF
C160100nF
C161100nF
Q29BFS17
R2798.2K
VC
C2
0
GN
D1
0
&
U34A
HC00
1
23
10nC81
&
U30C
HC00
9
108
R282
47
C162
C155
C170 C171
100nF
100nF 100nF
R276
33K
R274100
Display & Keyboard PCB, Component layout
8-14 Drawings & Diagrams
Display & Keyboard, PCB 2
Drawings & Diagrams 8-15
MAIN BOARD
V0
H0
H1
H2
V1 V2 V3 V4 V5 V6 V7
12
12
4
4
6
6
2
2
10
10
8
8
9
9
7
7
1
1
BP0
BP0
S0
S0
S3
S3
S7
S7
S11
S11
S16
S16
S21
S21
S25
S25
S29
S29
S34
S34
S39
S39
S38
S38
S37
S37
S36
S36
S35
S35
S33
S33
S32
S32
S31
S31
S30
S30
S28
S28
S27
S27
S26
S26
S24
S24
S23
S23
S22
S22
S20
S20
S19
S19
S18
S18
S17
S17
S15
S15
S14
S14
S13
S13
S12
S12
S10
S10
S9
S9
S8
S8
S6
S6
S5
S5
S4
S4
S2
S2
S1
S1
BP1
BP1
BP2
BP2
BP3
BP3
3
3
13
13
14
14
18
18
22
22
27
27
31
31
34
34
39
39
44
44
48
48
52
52
56
56
55
55
54
54
53
53
51
51
50
50
49
49
47
47
46
46
45
45
43
43
42
42
41
41
40
40
38
38
37
37
36
36
35
35
33
33
32
32
30
30
29
29
28
28
26
26
25
25
24
24
23
23
21
21
20
20
19
19
17
17
16
16
15
15
19 P204 21 P204 23 P204 25 P204 27 P204 29 P204 31 P204 33 P204
MA
INB
OA
RD
3
5
7
P204
P204
P204
P204
P204
P204
P204
P204
P204
P204
P204
P204
P204
P204
P204
P204
P204
EXT REFS201
CHECKS202
MEAS RESTARTS209
DISP HOLDS210
<FUNCTIONS216
STAND-BY IND
GATEIND
SCL
SDA
ON
ONS222
R20410
R20510
R20610
D201
D202
CQV13-6YELLOW
REDHLMP-K150
R20710
LOCAL/PRESET
BACK-LIGHT
TEMPCOMP
+5V
GND
NC
+5V
+5V
11,7,8,9 5,10
511,7,8,9,10
+5V
+5V
+5V
+5V +5V
C20210n
C20110n
IC TYPE
BACKLIGHT
D203DL100
U201 PCF8576
PCF8576
PCF8576
PCF8576
U202
GND
SYNC
SYNC
DISPDR
DISPDR
VLCD
VLCD
CLK
CLK
OSC
SCL
SCL
SDA
SDA
SA0
SA0
A1
A1
A0
A0
A2
A2
OSC
R201
220k
U201
U202
LOCAL/PRESETS224
STAND-BY
STAND-BYS223
U+12V
FUNCTION>S217
MEAS TIMES218
MENUS219
AUX MENUS220
SINGLES221
NULL/OFFSETS211
BLANK DIGITSS212
DATA ENTRY UPS213
DATA ENTRY DNS214
ENTERS215
FILTERS203
IMPS204
TRIG LVLS205
AUTOS206
<SENSS207
SENS>S208
28
32
36
35
22
24
26
38
18
20
37
2 10 39
1 4 6 12 14 16 30
8 9 11 13 15 17 30 34
E201
82 78 74 70 66 60 58 55 52 49 46 4443
7 10 13 14 18 22 27 32 36 39403837353433313029282625242321201917161512119865432141 42
454748505153545657596162636465676869717273757677798081
GPIB Unit, PM9626B, Component layout
8-16 Drawings & Diagrams
GPIB Unit, PM9626B
Drawings & Diagrams 8-17
This page is intentionally left blank.
8-18 Drawings & Diagrams
Chapter 9
Appendix
How to Replace SurfaceMounted Devices
Most of the components in this instrument are mounted on the sur-
face of the board instead of through holes in the board. These compo-
nents are not hard to replace but they require another technique. If
you do not have special SMD desoldering equipment, follow the in-
structions below:
9-2 How to Replace Surface Mounted Devices
Fig. 9-1 Heat the leads and push a thin aluminum sheetbetween the leads and the PC-board.
Fig. 9-2 When removed, clean the pads with desoldering
braid.
Fig. 9-3 Place solder on the pad.
Fig 9-4 Attach the IC to the pad with the solder.
Fig. 9-5 Solder all leads with plenty of solder; don’t worryabout short-circuits at this stage.
Fig. 9-6 Remove excessive solder with desoldering braid.
Fig. 9-7 Use a strong magnifying glass to make sure there
are no short-circuits or unsoldered leads.
Electrostatic discharge
Almost all modern components have extremely thin conductors and
metal oxide layers. If these layers are exposed to electrostatic dis-
charge they will break down or perhaps even worse, be damaged in a
way that inevitably will cause a breakdown later on. The lectro-tatic
Discharge, (ESD) sensitivity of MOS and CMOS semiconductors
have been known quite a while, but nowadays bipolar semiconduc-
tors and even precision resistors are ESD sensitive. Consider
therefoe all components, pc boards and sub assemblies as sensi-
tive to electrostatic discharge. The text below explains how you can
minimize the risk of damage or destroying these devices by being
aware of the problems, and learning how to handle these compo-
nents.
ESD sensitive options are packed in conductive containers
marked with the symbol to the leftl.
Never open the container unless you are at an ESD protected
work station.
Use a wrist strap grounded via a high resistance.
Use a grounded work mat on your work-bench.
Never let your clothes come in contact with ESD sensitive
equipment even when you are wearing a grounded
wrist strap.
Never touch the component leads.
Never touch open connectors.
Use ESD-safe packing materials.
Use the packing material only once.
Keep paper and non conductive plastics etc. away from your
work-bench. These may block the discharge path to
ground.
Electrostatic discharge 9-3
Glossary
A
ASIC Application Specific Integrated Circuit
C
Calibration Adjust-
ments
How to restore an instrument to perform in
agreement with its specifications
CSA Canadian Standards Association safety stan-
dard.
G
GaAs A technique to make very fast IC’s using
Gallium Arsenide substrate.
GPIB General Purpose Instrumentation Bus used for
interconnecting several measuring instruments
to a common controller.
I
I2C-bus An internal address- and data bus for communi-
cation between microcontroller, measuringlogic, and options.
IEC 1010-1 International Electrical Commission safetystandard.
L
LSI Large Scale Integrated circuit
O
OCXO Oven-Controlled X-tal Oscillator
P
PCA Printed Circuit Assembly
PCB Printed Circuit Board
Performance Check A procedure to check that the instrument is
functionally operational and performs to itsspecification. Must not require opening of cabi-
net. If the instrument passes the check it is con-
sidered as calibrate.
PWM Pulse Width Modulation
T
TCXO Temperature-Controlled X-tal Oscillator
9-4 Glossary
Power Supply Switchmode Module
Circuit Descriptions
Primary Circuits
For primary circuits outside the power supply module, see Chapter 4,
Circuit Descriptions, Power Supply.
The power supply module generates three DC voltages to the sec-
ondary circuits.
R24-R27, R31, and R32 give the start-up voltage to the control cir-
cuit U03. U03 outputs a frequency of 120 kHz on OUT (pin 10) to the
switch transistor V01. When the switch transistor has started, U03
will be supplied from the transformer T01 pin 3 via the diodes D09.
Every switch pulse causes a voltage drop over the resistors R35-R37
and R55. This voltage feeds the SENSE input (pin 5) of the control
circuit U03. When the voltage has reached the internal reference
level in U03, the switch transistor V01 is turned off.
V05 is a blanking transistor that will compensate for high transients
generated by the transformer T01.
The internal sawtooth generator RC (pin 7) in U03 is connected to
the SENSE input via V03, to compensate for low load.
The regulated +5 V is sensed by U01 and adjusted by R50. The out-
put of U03 is connected to the VF input (pin 3) of U03 via the
optocoupler U02.
The VREF pin (pin 14) outputs a reference voltage of 5 V DC.
Secondary circuits
For secondary circuits see Chapter 4, Circuit Descriptions, Power
Supply.
Circuit Descriptions 9-5
P 01 p in 1
U 0 2
T 01
V01D 09R 24-R 27,
R 31-R 32
V05
V0 3
U0 3SE N SE
R C
V F
VR EF
O U T
P 02 pin 3
P0 2 pin 5 & 6
P0 2 pin 2
P0 2 pin 7
R 50
U 01
D 02
D 04
D 03T0 1
D 01
P 01
p in 4 & 5
P 02pin 1,4 , 8, & 9
Fig. 9-8 Power supply module primary circuits.
Repair
Troubleshooting
Required Test Equipment
To be able to test the instrument properly using this manual you will
need the equipment listed in Table 9-1. The list contains specifica-
tions for the critical parameters.
Operating Conditions
Power voltage must be in the range of 90 to 260 VAC.
WARNING: Live parts and accessible terminals which
can be dangerous to life are always exposed inside
the unit when it is connected to the line power. Use
extreme caution when handling, testing or adjusting
the counter.
Primary circuits
CAUTION: If you adjust the +5 V trimmer you have to
adjust the complete instrument.
To verify the power supply proceed as follows:
– If the primary fuse is broken, there is a short circuit in the pri-
mary circuits. Use a DMM and try to locate the fault by resis-
tance measurements.
– Remove the cover from the power supply.
– Disconnect the power module from the main PCA and check
the resistance between pin 1 and 4 on the transformer T01, see
Fig. 9-9. If the DMM shows a short circuit, the fault is
proabably a broken transistor V01. Put the power module back.
– Connect the counter to the line power via an insulating trans-former with separate windings.
– Set the counter to STAND-BY mode.
– Check that the voltage between J9 and J10 is in the range of
90 to 260 VAC.
– Check that the DC voltage between pin 1 and 4 on T01 is
about 2 times the input AC voltage. If not, use traditional
faultfinding techniques to locate the fault.
– Disconnect the secondary load by moving the jumper J16 to its
alternative position.
– Check the “STAND BY” voltages according to Table 9-2.
– Restore the jumper J16 to its normal position.
– Check the waveforms in Fig. 9-10 at the corresponding
testpoints in Fig. 9-9 to verify the primary circuits. Use the
heat-sink of V01 as ground.
NOTE: U01 and U03 are located at the bottom side of the
PCA.
Secondary circuits
For secondary circuits see Chapter 5, Repair, Power Supply.
Safety Inspection and Test After Repair
General Directives
After repair in the primary circuits, make sure that you have not re-
duced the creepage distances and clearances.
Before soldering, component pins must be bent on the solder side of
the board. Replace insulating guards and plates.
9-6 Repair
Type Performance
DMM 3.5 digits
Oscilloscope 50 MHz 2-channel
Table 9-1 Required test equipment.
Test points Ground Voltage
U03 pin 11 & 12 U03 pin 8 +10 to +13.5 V
U03 pin 14 U03 pin 8 +5.0 V
V01 source U03 pin 8 +10 mV
U02 pin 1 Amplifier Screen +8.2 V
U01 pin 1 Amplifier Screen +4.4 V
TP15 Amplifier Screen +5.1 V
TP16 Amplifier Screen +14.8 V to +21 V
TP17 Amplifier Screen –12.5 V to –7.5 V
TP21 Amplifier Screen +12 V ±0.5 V
Table 9-2 Stand-by voltages.
TP15
T0116
127
+5V adjust
V01
U02
U01»+4.4V
U03
+10 to 13.5V
J16
C
D
E
»+8.2V
»+5.0V
»+10mV
AB
TP16
TP17
1
1P02
P01
Fig. 9-9 Test points and voltages for the power supply.
Safety Components
Components in the primary circuits are important to the safety of the
instrument and may be replaced only by components obtained from
your local Fluke organization.
Check the Protective Ground Connection
Visually check the correct connection and condition and measure the
resistance between the protective lead at the plug and the cabinet.
The resistance must not be more than 0.5 . During measurement,
the power cord should be moved. Any variations in resistance shows
a defect.
Calibration Adjustments
Required Test Equipment
Preparation
WARNING: Live parts and accessible terminals which
can be dangerous to life are always exposed inside
the unit when it is connected to the line power. Use
extreme caution when handling, testing, or adjust-
ing the counter.
Before beginning the calibration adjustments, power up the instru-
ment and leave it on for at least 60 minutes to let it reach normal oper-
ating temperature.
Setup
– Connect the counter to the line power.
– Switch on the counter.
– Press PRESET, then press ENTER.
Adjustment
CAUTION: If you adjust the +5 V trimmer you have to
adjust the complete instrument.
– Connect the DMM between TP23 and ground, see Fig. 9-11.
– Adjust the +5 V trimmer potentiometer R50 in the power sup-
ply through the nearest vent in the protective cover, until the
DMM reads +5.00 ± 0.01 V.
– Check that the unregulated voltage from the power supply at
test point TP16=+15 is about +18 V.
– Check that the unregulated voltage from the power supply at
test points TP17=–7 is about –8 V.
Calibration Adjustments 9-7
Type Performance
DMM 3.5 digits
Table 9-3 Required Test Equipment.
0.2
0.4
0.6
0.8
1.0
1.1
1.2
V
2
4
6
8
10
12
V
1
2
3
V
2
4
6
8
10
12
V
100
200
300
400
V
500
V01 Gate
V01 dra in
U03 pin 7 RC
U03 pin 10 OUT
V01 S ource ( current )
0 2 4 86 10 uS
0 2 4 86 10 uS
0 2 4 86 10 uS
0 2 4 86 10 uS0 2 4 86 10 uS
A
C
B
D
E
Fig. 9-10 Typical curves of the power supply.
PowerModule
TP16
TP17
TP23
J18
+5V adjust
Fig. 9-11 Test points and trimmer for the power supply.
Replacement Parts
Pos Description Part Number
Heat Sink 16°K/W TO220 5322 255 41313 P
Heat Sink 13.5°K/W TO220 5322 255 41314 P
C01 Capacitor 1 nF 5% 63V 4822 122 31746
C02 Capacitor 1 nF 5% 63V 4822 122 31746
C03 Capacitor 220 pF 20% 200V 5322 126 13129
C04 Capacitor 33 nF 10% 50V 4822 122 31981
C05 Capacitor 33 nF 10% 50V 4822 122 31981
C06 Capacitor 33 nF 10% 50V 4822 122 31981
C07 Capacitor 100 nF 10% 63V 4822 122 33496
C08 Capacitor 100 nF 10% 63V 4822 122 33496
C09 Capacitor 47 nF 10% 250V 4822 121 41676
C10 Capacitor 330 nF 20% 250V 5322 121 44222
C12 Capacitor 100 F 20% 35V 5322 124 40852
C13 Capacitor 220 pF 20% 200V 5322 126 13129
C14 Capacitor 100 pF 5% 63V 4822 122 31765
C15 Capacitor 22 pF 5% 63V 4822 122 32482
C16 Capacitor 4.7nF 10% 63V 4822 122 31784
C17 Capacitor 4.7nF 10% 63V 4822 122 31784
C18 Capacitor 100 nF 10% 63V 4822 122 33496
C19 Capacitor 100 nF 10% 63V 4822 122 33496
C20 Capacitor 100 nF 10% 63V 4822 122 33496
C21 Capacitor 470 F 20% 35V 2M 5322 126 13131
C22 Capacitor 470 F 20% 35V 2M 5322 126 13131
C23 Capacitor 10000 F 20% 6.3V 5322 124 80821
C24 Capacitor 1 nF 5% 63V 4822 122 31746
C25 Capacitor 100 nF 10% 63V 4822 122 33496
C26 Capacitor 100 nF 10% 63V 4822 122 33496
C27 Capacitor 100 nF 10% 63V 4822 122 33496
C28 Capacitor 220 pF 20% 200V 5322 126 13129
D01 Diode 7A BYW29/200 5322 130 32328
D02 Diode 7.5A MBR760 60V 5322 130 83602
D03 Diode 7A BYW29/200 5322 130 32328
D04 Diode 0.2A BAV23 200V 5322 130 33764
D06 Diode 0.35 W BZX84-C8V2 5322 130 80255
D07 Diode BYV26E DOD57 4822 130 60815
D08 Diode 0.35 W BZX84-C18 5322 130 80212
D09 Diode 0.2A BAV23 200V 5322 130 33764
D11 Diode 0.35 W BZX84-C18 5322 130 80212
D12 Diode 0.35 W BZX84-C18 5322 130 80212
D13 Diode 0.35 W BZX84-C8V2 5322 130 80255
D14 Diode 0.2A BAV23 200V 5322 130 33764
R01 Resistor 82 k 1% .125W 4822 051 10829
R02 Resistor 82 k 1% .125W 4822 051 10829
R03 Resistor 270 k 1% .125W 4822 051 10271
R04 Resistor 10.0 k 1% 0.125W 4822 051 51003
R06 Resistor 2.20 k 1% .125W 5322 116 80434
R07 Resistor 1.00 k 1% 0.125W 4822 051 51002
R08 Resistor 1.80 k 1% .125W 4822 051 10182
R09 Resistor 3.90 k 1% .125W 5322 116 80443
R10 Resistor 47 k 1% .125W 5322 116 80446
R11 Resistor 220 k 1% .125W 5322 116 80436
R12 Resistor 10.0 k 1% 0.125W 4822 051 51003
R13 Resistor 10.0 k 1% 0.125W 4822 051 51003
R14 Resistor 10.0 1% 0.125W 4822 051 51003
R15 Resistor 10.0 k 1% 0.125W 4822 051 51003
R16 Resistor 10.0 k 1% 0.125W 4822 051 51003
Pos Description Part Number
R17 Resistor 10.0 k 1% 0.125W 4822 051 51003
R18 Resistor 10.0 k 1% 0.125W 4822 051 51003
R19 Resistor 10.0 k 1% 0.125W 4822 051 51003
R20 Resistor 10.0 k 4822 051 51003
R24 Resistor 100 k 1% 0.125W 4822 051 51004
R25 Resistor 100 k 1% 0.125W 4822 051 51004
R26 Resistor 100 k 1% 0.125W 4822 051 51004
R27 Resistor 100 k 1% 0.125W 4822 051 51004
R28 Resistor 10.0 k 1% 0.125W 4822 051 51003
R29 Resistor 4.7 10% 0.25W 4833 051 10478
R30 Resistor 10.0 k 1% 0.125W 4822 051 51003
R31 Resistor 100 k 1% 0.125W 4822 051 51004
R32 Resistor 100 k 1% 0.125W 4822 051 51004
R33 Resistor 10.0 1% 0.125W 4822 051 10109
R34 Resistor 1.00 k 1% 0.125W 4822 051 51002
R35 Resistor 2.7 5% 0.25W 4822 051 10278
R36 Resistor 2.7 5% 0.25W 4822 051 10278
R37 Resistor 2.7 5% 0.25W 4822 051 10278
R38 Resistor 1.00 k 1% 0.125W 4822 051 51002
R39 Resistor 10.0 1% 0.125W 4822 051 10109
R40 Resistor 100 1% 0.125W 5322 116 80426
R41 Resistor 100 1% 0.125W 5322 116 80426
R42 Resistor 1.00 k 1% 0.125W 4822 051 51002
R43 Resistor 100 5322 116 80426
R44 Resistor 100 5322 116 80426
R45 Resistor 1.00 k 4822 051 51002
R46 Varistor 95V 95VRMS4.1J 5322 116 21222 P
R47 Resistor 4.70 k 1% .125W 5322 116 80445
R48 Resistor 10.0 k 1% 0.125W 4822 051 51003
R49 Resistor 22.0 k 1% .125W 5322 116 80435
R50 Potentiometer 1 k 20% 4822 101 10792
R51 Resistor 3.30 k 1% .125W 4822 051 53302
R52 Resistor 8.20 k 1% .125W 4822 051 10822
R53 Resistor 470 k 1% .125W 5322 116 80447
R54 Resistor 470 k 1% .125W 5322 116 80447
R55 Resistor 2.7 5% 0.25W 4822 051 10278
R56 Resistor 100 1% 0.125W 5322 116 80426
R57 Resistor 47 1% .125W 5322 116 80448
R58 Resistor 270 1% .125W 4822 051 10271
T01 Transformer 5322 148 20035 P
U01 IC-ref 2.5V TL431I-D SO8 5322 209 62422
U02 Optocoupler CNX82A 4822 130 10025
V02 Transistor 0.50 A BC807-25 5322 130 60845
V03 Transistor 0.50 A BC817-25 4822 130 42804
V04 Transistor 0.50 A BC817-25 4822 130 42804
V05 Transistor 0.50 A BC817-25 4822 130 42804
V06 Transistor 0.50 A BC817-25 4822 130 42804
V07 Transistor 0.50 A BC817-25 4822 130 42804
V08 Transistor 0.50 A BC807-25 5322 130 60845
9-8 Replacement Parts
Replacement Parts 9-9
This page is intentionally left blank.
Power Supply, Component layout
9-10 Replacement Parts
BOTTOM SIDE
TOP SIDE
Power Supply
Replacement Parts 9-11
K RE
FA
CO
MP
VF
RC
VR
EF
SEN
SE
OU
T
1210 98 7
1 6 3 4
C01
1N
R0
1
82
D01
BY
W2
9F-2
00
D02
MB
R76
0
C02
1N
R0
2
82
C03
220
P
R0
3
270
D03
BY
W2
9F-2
00
D04
BAV
23
D04
BAV
23
C0
4
33N
C0
5
33N
R04
10K
C06
33N
R05
10K
1 25 4
U02
CN
X82
A
R06
2.2K
R07
1K
R0
8
1.8K
D0
6B
ZX
84C
8V2
C0
7
100N
1 86
U0
1
TL43
1I
R09
3.9
K
R1
0
47K
C0
8
100N
R1
1
220
K
C0
9
47N
-250
V
D07
BYV
26E
R1
2
10K
R13
10K
R14
10K
R15
10K
R16
10K
R1
7
10K
R1
8
10K
R19
10K
R20
10K
C10
330N
R2
41
00K
R2
51
00K
R26
100
K
R27
100
K
V01
BU
K446
R28
10K
D08
BZX
84C
18
D09
BAV
23
D09
BAV
23
R29
4.7
D11
BZX
84C
18C
12
100
U-3
5V
R3
0
10K
R31
100
KR
32
100
K
D12
BZ
X84
C18 D13
BZX
84C
8V2
C13
220P
R33 10
R3
4
1K
R3
52
.7R
36
2.7
R37
2.7
R38
1K C1
4
100
P
R3
91
0
V04
BC
817
D14
BAV
23
R40
100
R4
110
0
C15
22P
D1
4B
AV
23R
421K
V05
BC
817
R43
100
R44
100
C1
6
4.7
N
C17
4.7N
R4
5
1K
C1
8
100N
C1
9
100N
C2
0
100N
R4
6
C21
470
U-3
5V C22
470
U-3
5V C23
1000
0U
-6.3
V
R47
4.7K
R4
8
10K
C2
41
N
R49
22K
V03
BC
817
13
2
R5
01K
R51
3.3K
14
7 3 1
10 5
U03
UC
3842
A
C25
100
N
C26
100
N
11,1
2
8,9
51
P01
41 2 3 4 5 6 8 9 7
P0
2
C27
100N
R52
8.2K
V07
BC
817
V02
BC
807
R53
470
K
R54
470
K
R55
10
R5
61
00
R57
100
C28
220
P
R5
8
270
11
T01
V0
6B
C8
17
V08
BC
807
PM6685R
Introduction
A Rubidium timebase is now available for the PM6685 Frequency
counter. This oscillator cannot be retrofitted in the standard version
of the PM6685. Due to the size of the timebase and its power require-
ments, a larger cabinet must be used.
A fan is needed to keep the temperature to an acceptable level.
This version is called PM6685R, where “R” stands for Rubidium.
Performance Check
Required Test Equipment
NOTE: To fully test the accuracy of the PM6685R, access to
an extremely high stability reference signal is needed,
for example a Cesium atomic reference or a transmit-
ted signal from a nationally or internationally traceable
source. Additionally the instrument has to be stabilized
for a period of one month.
The PM6685R is equipped with an LED labelled “UNLOCKED”.
When the LED is lit the Rubidium time base is still in its warm-up
phase and is not yet stabilized.
Test procedure
– Connect the counter to the line power.
– Check that the UNLOCK LED is lit.
– Check that the UNLOCK LED is switched off within 6
minutes after connection to line power.
– Connect a 10 MHz reference signal to input A of the counter.
– Select FREQUENCY A measurement.
– Select 1 s measuring time.
– Check that the displayed frequency is 10.00000000 MHz
±1 LSD < 6 minutes after connection to line power.
Functional DescriptionThe oscillator is supplied with 24 V from the extra power supply.
The oscillator generates a stable 10 MHz output frequency from a
20 MHz Voltage Controlled Crystal Oscillator (VCXO), whose fre-
9-12 Introduction
Type Performance Model
10 MHz reference 1x10-10
Calibrated Rubidium
oscillator or Cesium
atomic standard
Table 9-4 Required test equipment
MainPowerSupply
J3Fan
RubidiumTimebase
J4
P2
P3
J24
P1
Aux PowerSupply
1
Freq. Adj.
1
J31
1
Fig. 9-12 Location of the Rubidium Timebase and its power
supply.
quency is locked to the atomic-standard “resonance frequency” of
the rubidium atom, see Fig. 9-14.
Amicrowave signal that is derived from the VCXO tunable oscillator
is applied to rubidium vapor contained within a heated glass cell.
Light from a rubidium lamp is passed through the cell and
illluminates a photo detector causing current to flow in the detector.
As the applied microwave signal approaches the frequency that cor-
responds to the ultra stable rubidium atomic resonance frequency, the
rubidium light entering the glass cell is absorbed by the rubidium va-
por to an increased extent causing a decrease in the photo detector
current. This “darkening” effect is used to generate an error signal
which permits continuous regulation of the quartz crystal oscillator
output frequency, thereby locking it to the frequency of the atomic
standard .
Calibration Adjustments
NOTE: Before Calibration Adjustment, the Rubidium time
base must have been in operation for more than 24
hours.
Required Test Equipment
Setup
– Connect the counter to the line power.
– Press PRESET, then ENTER.
– Press AUX.
Calibration Adjustments 9-13
Type Performance Model
10 MHz reference 1x10-10
Calibrated Rubidium
oscillator or Cesiumatomic standard
Table 9-5 Required test equipment.
A2RUBIDIUM
OSCILLATOR
TYPE LPRO
D1 UNLOCKED
UNIT 1J9
J10
SAFETY EARTH
5
3
2
1
3
12
90 to260v
CNT-85R REAR
PANEL
LINE
FILTER
FREQ.ADJUST
REAR VIEW
OF P3
3
J24
R11k
P3
1
2
3
4
5
6
7
8
9
10
A1AUX POWER
SUPPLY
5
4+24V
0V
P2
3
1
N
L
P1
1
2
9
10
0V
3
2
+24V
L1-L3
J3
J4
R23.83k
10 MHz
Fig. 9-13 Wiring diagram showing the interconnections between the Rubidium timebase, its power supply, and the main PCA.
PM6685R REAR
PANEL
Frequency multiplier/
Synthesizer
20 MHz Voltage tunable
Quartz Oscillator
(VCXO)
Feedback
electronics
(Servo)
DC-er ror
signal
DC correction
voltage
6.8 GHz
10 MHz output
Rubidium
lamp
Rubidium
cell
Detector
Fig. 9-14 Block diagram showing the principle of a Rubidium
Atomic Standard.
– Select NULL by pressing or .
– Press ENTER twice.
– Set the measuring time to 10 s.
– Connect the 10 MHz reference to the input A of the counter.
Adjustment procedure
– Remove the seal from the front panel.
– Adjust the potentiometer beyond the seal until the display
reads 0.5-3
Hz or less.
– Check that the value is stable over time, (more than 30 min-
utes).
– Cover the “CALIBRATION ADJUSTMENT” hole on the front
panel with a relevant seal if necessary.
Replacement Parts
Pos Description Part Number
Cover, (incl. front part). 5322 447 92194 P
Fan 2822 031 01327 R
Text plate kit 4031 100 62440 R
Rear plate 4031 100 53930 P
A1 Power supply 5322 214 91268 P
D1 LED, HLMP-1300, red 5322 130 81921
L1 Toroid 5322 526 10545
L2 Toroid 5322 526 10545
L3 Toroid 5322 526 10545
P1-P3 Cable kit 4031 100 61530 P
R1 Potentiometer, 1 k 5322 101 11298
R2 Resistor 3.83 k, 1% 0.5 W MRS25 4822 050 23832
NOTE: The rubidium time base (unit A2) must be sent to a
Fluke service center for repair. Follow the exchange
procedure.
9-14 Replacement Parts