training lcd lg 32lh30

32LH30 PRESENTATION32LH30 PRESENTATION

Direct View LCD

LCD DV 32LH302 Spring 2009

OUTLINEOUTLINE

• Main Board• T-CON Board

Circuit Board Operation, Troubleshooting of :• Switch mode Power Supply

Section 1

Section 2

Contact Information, Preliminary Matters, Specifications,LCD Overview, General Troubleshooting Steps, Signal Distribution, Disassembly Instructions and Voltages

• Ft Control Board

• Side Keys


32LH30 LCD Direct View Display

Section 1

This Section will cover Contact Information and remind the Technician of Important Safety Precautions for the Customers Safety as well as the Technician and the Equipment.

Basic Troubleshooting Techniques which can save time and money sometimes can be overlooked. These techniques will also be presented.

This Section will get the Technician familiar with the Disassembly, Identification and Layout of the LCD Display Panel.

At the end of this Section the Technician should be able to Identify the Circuit Boards and have the ability and knowledge necessary to safely remove and replace any Circuit Board or Assembly.

Overview of Topics to be DiscussedOverview of Topics to be Discussed


IMPORTANT SAFETY NOTICEIMPORTANT SAFETY NOTICE

The information in this training manual is intended for use by persons possessing an adequate background in electrical equipment, electronic devices, and mechanical systems. In any attempt to repair a major Product, personal injury and property damage can result. The manufacturer or seller maintains no liability for the interpretation of this information, nor can it assume any liability in conjunction with its use. When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Electronics. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury. If wires, screws, clips, straps, nuts, or washers used to complete a ground path are removed for service, they must be returned to their original positions and properly fastened.

CAUTIONCAUTION

To avoid personal injury, disconnect the power before servicing this product. If electrical power is required for diagnosis or test purposes, disconnect the power immediately after performing the necessary checks. Also be aware that many household products present a weight hazard. At least two people should be involved in the installation or servicing of such devices. Failure to consider the weight of an product could result in physical injury.

Preliminary Matters (The Fine Print)Preliminary Matters (The Fine Print)


Today’s sophisticated electronics are electrostatic discharge (ESD) sensitive. ESD can weaken or damage the electronics in a manner that renders them inoperative or reduces the time until their next failure. Connect an ESD wrist strap to a ground connection point or unpainted metal in the product. Alternatively, you can touch your finger repeatedly to a ground connection point or unpainted metal in the product. Before removing a replacement part from its package, touch the anti-static bag to a ground connection point or unpainted metal in the product. Handle the electronic control assembly by its edges only. When repackaging a failed electronic control assembly in an anti-static bag, observe these same precautions.

Regulatory InformationRegulatory Information

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential installation. This equipment generates, uses, and can radiate radio frequency energy, and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna; Increase the separation between the equipment and the receiver; Connect the equipment to an outlet on a different circuit than that to which the receiver is connected; or consult the dealer or an experienced radio/TV technician for help.

ESDESD NoticeNotice (Electrostatic Static Discharge)(Electrostatic Static Discharge)


Also available on the Also available on the Plasma pagePlasma page

New Training Materials on New Training Materials on the Learning Academy sitethe Learning Academy site

CONTACT INFORMATIONCONTACT INFORMATIONCustomer Service (and Part Sales) (800) 243-0000

Technical Support (and Part Sales) (800) 847-7597

USA Website (GCSC) aic.lgservice.com

Customer Service Website us.lgservice.com

LG Web Training lge.webex.com

LG CS Academy lgcsacademy.com

LG Electronics Alabama, Inc. 201 James Record Road, Huntsville,

AL, 35813.

http://136.166.4.200

Published August 2009 by LG Technical Support and Training

32LG40, 32LH30, 42LG60, 42LG70, 42LH20, 42LH40, 42LH50, 47LG9042PG20, 42PQ20, 42PQ30, 50PG20, 50PS80, 50PS60

LCD-DV:PLASMA:

Plasma PanelAlignment Handbook


Safety and Handling Regulations

1. Approximately 20 minute pre-run time is required before any adjustments are performed. 2. Refer to the Voltage Sticker on the Switch Mode Power Supply silk screening. (+/- ½ volt). 3. Be cautious of electric shock from the Backlight section, it uses high voltage AC. Check that

the Power Supply and Drive Circuits are completely discharged because of residual current stored before Circuit Board removal.

4. C-MOS circuits are sensitive to static electricity. Use caution when dealing with these IC and circuits.

5. Exercise care when making voltage and waveform checks to prevent costly short circuits from damaging the unit.

6. Be cautious of lost screws and other metal objects to prevent a possible short in the circuitry.

1. Check the appearance of the Replacement Panel and Circuit Boards for both physical damage and part number accuracy.

2. Check the model label. Verify model names and board model matches.3. Check details of defective condition and history. Example: Oscillator failure dead set, etc…

Checking Points to be Considered

LCD OverviewLCD Overview


Basic Troubleshooting StepsBasic Troubleshooting Steps

Define, Localize, Isolate and Correct

•Define Look at the symptom carefully and determine what circuits could be causing the failure. Use your senses Sight, Smell, Touch and Hearing. Look for burned parts and check for possible overheated components. Capacitors will sometimes leak dielectric material and give off a distinct odor. Frequency of power supplies will change with the load, or listen for relay closing etc. Observation of the front Power LED may give some clues.

•Localize After carefully checking the symptom and determining the circuits to be checked and after giving a thorough examination using your senses the first check should always be the DC Supply Voltages to those circuits under test. Always confirm the supplies are not only the proper level but be sure they are noise free. If the supplies are missing check the resistance for possible short circuits.

•Isolate To further isolate the failure, check for the proper waveforms with the Oscilloscope to make a final determination of the failure. Look for correct Amplitude Phasing and Timing of the signals also check for the proper Duty Cycle of the signals. Sometimes “glitches” or “road bumps” will be an indication of an imminent failure.

•Correct The final step is to correct the problem. Be careful of ESD and make sure to check the DC Supplies for proper levels. Make all necessary adjustments and lastly always perform a Safety AC Leakage Test before returning the product back to the Customer.


This section of the manual will discuss the specifications of the 32LH30LCD Direct View Display Panel.

32LH30 Product Information32LH30 Product Information


Basic SpecificationsBasic Specifications

Key Features• 32" Screen (31.5 diagonal) • 1080p HD Resolution • Two (2) HDMI™ (V.1.3 with Deep Color) • ISFccc Ready • Smart Energy Saving • LG SimpLink™• LG Core Technologies (32-inch and above) • Dynamic Contrast Ratio 50,000:1 • Response Time 6ms • Brightness 500 cd/m2 • Viewing Angle 178º H / 178º V • Life Span (Typical) 60,000 hr • Built-in Tuner ATSC/NTSC/Clear QAM • Cabinet Color Glossy Piano-Black • Limited Warranty 1 Year Parts/Labor


SDEDHDHDHD

Interlaced2 Fields to make a Frame

ProgressiveEach Field is a Frame

Think of sync as the Panels “Refresh Rate”

Possible FrameRates:24FPS30FPS60FPS

FORMATS480I480P1080I720P1080P

InterlacedProgressiveInterlacedProgressiveProgressive

240 Lines480 Lines540 Lines720 Lines1080 Lines

Lines Per Field

FULL HD 1080p RESOLUTION Pixels: 1920 (H) x 1080p (V)

HD RESOLUTION 720p HD Pixels: 1366 (H) × 768 (V)

720P PANEL1365 (H) × 768 (V)

1080P PANEL1920 (H) x 1080 (V)

BASICPIXEL COUNTS

AND LOGOS

Panel Pixels (Lines of Resolution)Panel Pixels (Lines of Resolution)


Basic Specifications (LOGO Familiarization) Page 1Basic Specifications (LOGO Familiarization) Page 1

Full HD 1080p Resolution Displays HDTV programs in full 1920 x 1080p resolution for a more detailed picture.


TOP PORTION BOTTOM PORTION

Remote Control FamiliarizationRemote Control Familiarization


Accessing the Service MenuAccessing the Service Menu

REMOTEBOTTOM PORTION

SIDE KEYS

To access the Service Menu.1) Turn the Set On2) Simultaneously, Press and

“Hold” the Menu Key on the Side Key pad and Press and “Hold” the Menu Key on the Remote approximately 5 seconds.

3) If Customer’s Menu appears, continue to hold until it disappears.

4) The Service Menu appears

Note: If a Password is required to enter the Service Menu. Enter;

0000


Rear and Side Input JacksRear and Side Input Jacks

Main PWBRear Input Locations

Rear Input Jacks

USB Portfor Software

Upgrades Only


1) Create an LG_DTV folder on the USB Flash Drive

2) Copy new software (xxx.epk) to "LG_DTV" folder. Make sure to have correct software file.

3) With TV turned on, insert USB flash drive.4) You can see the message

“TV Software Upgrade” (See figure to right)5) Cursor left and highlight "START" Button and

push “Enter” button using the remote control. 6) You can see the download progress Bar.7) Do not unplug until unit has automatically

restarted.8) When download is completed, you will see

“COMPLETE”. 9) Your TV will be restarted automatically.

USB Software DownloadUSB Software Download

Shows the Currently Installed Version

Shows the Software Version

found on the USB Flash

Drive

Shows the Software file found on the USB Flash

Drive

* CAUTION: Do not remove AC power or the USB Flash Drive. Do not turn off Power, during the upgrade process.

32LH30 PRODUCT DIMENSIONS32LH30 PRODUCT DIMENSIONS

17

7-7/8"200mm

2-5/16"58.4mm

31-1/2"800mm

Remove 4 screws to remove stand for wall mount

Model No.Serial No.Side Label

11-5/8"296mm

16-3/8"416mm

3-1/8"78.7mm

8-7/8"226mm

Center

3-15/16"100mm

Weight without Stand: 24.3 lbWeight with Stand: 27.6 lb

2-3/8"60mm

4-1/2"114mm

12 11/16"322.7mm

10 13/32"264.3mm

20-13/16"528.3mm

23-1.8"586.7mm

WattageAVG: 102WSTBY: >1W


Disassembly:This section of the manual will discuss Disassembly, Layout and Circuit Board Identification, of the 32LH30 LCD Direct View Television.

Upon completion of this section the Technician will have a better understanding of the disassembly procedures, the layout of the printed circuit boards and be able to identify each board.

Troubleshooting:This section of the manual will also discuss troubleshooting.

Upon completion of this section the Technician will have a better understanding of how to diagnosis and resolve problems.

DISASSEMBLY AND TROUBLESHOOTING SECTIONDISASSEMBLY AND TROUBLESHOOTING SECTION


Removing the Back Step (1)Removing the Back Step (1)

Remove the Stand byPulling it out of itsRetaining bracket.

Lay the TV down on its face. Remove the 6 screws around stand indicated by the arrows.

Notice the plastic support bar hidden behind the stand.

The back can now be removed.

Reinsert the stand and stand the unit

upright for service position.

Put one screw into the stand to prevent it from

falling out.

Remove


The Stand has to be removed first.Remove the 23 screws indicated.

Pay attention to the size and type of screwas there are many different types.

Putting in an improper screw when reassembling may Cause damage.

The Stand must be removed before removing the back.

Removing the Back Cover Step 2 (Stand has to be removed)Removing the Back Cover Step 2 (Stand has to be removed)


Circuit Board LayoutCircuit Board Layout

POWER SUPPLY

Main PWB

LVDSCable

T-CON Under Shield

Ft IR/LED Control

AC Input

RFInput

Speaker R

Rear Inputs

MasterPower Switch

Side Key

Speaker L

T-CON p/n: EAT60666401Ballast p/n: EAY60713901

BacklightConnections

BALLAST


Power Power Supply PWB Supply PWB RemovalRemoval

Disconnect P201, P203, AC In SK100 and SK101.

Remove the 4 screws indicated by the arrows.

P201

AC In

SK100

P203

Do not have to be

released

SK101

Press inTwo tabsto release

lock

P201


Power Supply (Master Power Switch) LocationPower Supply (Master Power Switch) Location

MASTER AC SWITCH

LOCATION(Bottom Left Side viewed from rear)

On Off

If the TV won’t come on, be sure

to check the Master Power Switch before assuming a failure has occurred.


Power Supply (SMPS) PWB LayoutPower Supply (SMPS) PWB Layout

Hot Ground Shock Hazard

To MainP201

AC INSK100

F1005A/250V

AC IN

F5013.15A/250VRun 380V

STBY 168VFrom Hot Gnd

L

N

Pin 1 Pin 2

To BallastP203

ToMaster Power Switch

SK101

To Backlights

Ballast

T-CON PWB12V LVDS

Along with VideoOn LVDS cable

POWER SUPPLY (SMPS)

Inverter OnStarts the BallastBacklights Light

24V B+ for the BallastBridge

Stand By 5V

Power ButtonOr Remote Key

Reset ofMain Board

MAIN PWB

5V Switch

PWROn

12V VideoProcessing

InvOn

24VRegulator

12V/24V Regulators

Other Regs

StandBy 5V Reg

1

2 6 66 8

8

6

3

5

32LH30 POWER SUPPLYTURN ON COMMANDS FROM MAIN PWB

32LH30 POWER SUPPLYTURN ON COMMANDS FROM MAIN PWB

6

6

6Primary side fuse:

Stand-By 90VRun 370V

4

24V Audio

12V 24V

8

RegFor

Micro

LVDS12V

Switch12V

7

7

At point TV is in Stand-By state. Energy Star compliant.Less than 1 Watt

4

Other Circuits 5V General

BR1Fixed

AnalogDimming

PWM-DIMDigital

Dimming

Manipulates Backlights

Other C

ircuits

9

Cust Menu for Backlight

Picture Content

Power O

n

3

8

No AC Det in this

model

LVDS Panel ControlInv On/Off

Microprocessor IC100Also Video Processor

LVDSVideo

12V

Power On

AC In

25

Ft Control

24V

INV On

9

PWM-DIM (PWM Dimming) Manipulates the Backlight Brightness via Customer’s OSD.Manipulates the Backlight Brightness via the video processor. Darker Picture, Darker Backlights to facilitate improved Contrast Ratio. 0.6V ~ 3.3V Range

32LH30 P700 ON MAIN PWB TO SMPS P201 TURN ON CIRCUIT32LH30 P700 ON MAIN PWB TO SMPS P201 TURN ON CIRCUIT

R189

R185

1.2K

INV ON/OFF

PWR ON

100

R714

R704

C711150pF

C1811uF

P700

12V12V

Gnd

Gnd

Gnd

Gnd

0V

3.38V

4.98V

1.8V

PWR On

P201

ERR Out

PWR

A.DIMINV.On

PWM-DIM

n/c

SMPS

AB12

IC100Mstar

PWM2

PWM0

100

n/c

GndGndGndGnd

A-DIM (Analog Dimming) Fixed Value.

100

H5R245100

GPIO137SBY5V

MAINPWB

5V

5V5V5V

GndGnd

12V

2

1

4

3

6

5

8

7

10

9

11

12

14

13

16

15

18

17

20

19

22

21

23

24

2

1

4

3

6

5

8

7

10

9

11

12

14

13

16

15

18

17

20

19

22

21

23

24

21.3V24V

GndGnd

GndGndGndGnd

n/c n/c

n/c n/c

E5 GPIO 134L706

L70424V

C72168uF

C72768uF

L70712V

C7200.1uF C722

47uF

L701

Q701R703R706

R237

G5R719 1KΩ

Q702

R759 0Ω

R717 3.3KΩ

GPIO 136R244 100Ω

+5V General

Power On

Inverter On/Off

3

1

2

6

5

8

7

Q706

+5VL715

+5V GeneralL714

LVDS 12V Panel PowerL728

Q703 R237 100Ω

0.2V

6V

0.6V

4Q704Q705

LVDS Panel Control

L708

R25310KΩ

0V0.6V

12VR739 47KΩ

R740 47KΩ

AB13

PWM-DIM (Digital Dimming)

C726220uF STBY5V

L700

R743

0

L733

Relay On

A-DIM

P-DIM

3.3V-ST

STBY5V

4.7K C1821uF

C7251uF

C7061uF

21.3V

3.8V

10K10K

26


Power Supply (SMPS) PWB Operational TroubleshootingPower Supply (SMPS) PWB Operational Troubleshooting

Power Supply Troubleshooting

Ac voltage is supplied to the Power Supply at Connector SC100. This set does not use AC Detect. The AC input generates a Hot Ground primary power supply that runs in two states, Stand-By (168) and Run (380V) measured at Fuse F501. This primary voltage develops all other voltages that are output from the power supply. During Stand-By, the 5 Volt Standby should be present at connector P201, Pins7,8,9 or 10. If Missing remove AC Power and unplug Connector P201, apply AC Power and recheck for presence of 5 Volt Standby. Loss of 5 Volt Standby would be a Power Supply Failure. Presence of 5 Volt Standby would be an indication of a failure on the Main Board or possibly the Front PWB (IR) assembly. Suspect a possible short circuit loading the supply. Remember to observe the Front Power Indicating LED this may save some time. A lit LED indicates the Stand-By 5V voltage is present!

The Main Board sends two commands to the Power Supply Board one being PWR the other is INV ON. These two voltages are used to control the power on turn on sequence. First via PWR (Pin 2) also known as POWER ON, activates the Ballast voltage 24V and the 17 Volt and 12 Volt lines to the Main board. The 2nd command is INV ON (P201 pin 20). It is the Lamp Lighting Command Signal. If either command (PWR-ON or INV-ON) is missing it will result in a no picture symptom, as the backlights will not turn on.

These voltages can easily be checked with the volt meter! Remove AC Power, unplug the Connector to the Ballast P203. Reapply AC Power and press the ON-OFF Button on either the Remote Control or Power Button on the Unit. Watch for the Power ON LED to change color from red to blue. This is an indication the PWR Signal was created on the the Main board. Check P700 or P201 pin 2 for the PWR-ON command (4.9V) to the Power Supply. Check P201 for 24V (Pins 17 or 18) and 12V (Pins 13 or 14). Confirm Pin 20 of P201 went to 3.3V. This is the INV ON signal needed to light the Lamps.Problems with either voltage can be easily solved by following the simple steps on the next page.


TEST 1 Power Supply PWB Low Voltage TestTEST 1 Power Supply PWB Low Voltage Test

AC Should not be applied at any time while adding resistors or while unplugging connectors as damage to the circuit PWB may occur.

a) The SMPS PWB “MUST” be producing STBY 5V on either pin 7, 8, 9 or 10 (5V).

If 5V Standby is not being generated, the SMPS PWB is defective and must be replaced. There is no need to continue with the next test.

(b) Unplug P700 on the Main PWB and P203 to the Ballast.

TEST 1:

(1) Add a 10K resistor between (5V STBY) pin 7, 8, 9 or 10 and Pin 2 (PWR). Apply AC. This will turn on the power supply.a) Check that the 24V and 12V power supplies are

turned on, P201 (24V pins 17 and 18) (12V pins 13 and 14) and 24V to the Ballast P203 Pins 1~5.

(2) Remove AC power. Reinsert the plug P203 to the Ballast.

Use P700Side to insert

resistors


Continue if the 1st test was successful. Leave original 10K resistor in place.

(3) Add another 10K resistor between (5V) pin 7, 8, 9 or 10 and Pin 20 (INV On).

(4) Apply AC Power. This simulates a Power On and Backlight On command.

Backlights Normal:a) If normal, the backlights should turn on.

Backlights Abnormal:b) Recheck connector P203 and confirm 24V on pins 1~5.

1) If low or missing, use diode mode to check the 24V line on Ballastconnector CN1. If low, this indicates a shorted output FET).

2) If open, check the Ballast Fuse, possible Open.c) Confirm the INV On/Off line P203 Pin 10 is going to 3V.

REMOVE AC POWER:d) Check the connections to the Backlights. DO NOT check these when AC

is applied as they carry 1.2Kv each.

TEST 2 Power Supply PWB Backlights TestTEST 2 Power Supply PWB Backlights Test

P700 Connector disconnected from the Main PWB.Apply AC after adding jumper.

Use P700Side to insert

resistors


Power Supply Connector P201 Voltage and Diode CheckPower Supply Connector P201 Voltage and Diode Check

Diode Check taken with meter in Diode Mode with all Connectors Removed

Open4.99V0VPWR-ON2

GndGndGndGnd4

GndGndGndGnd6

Open5.14V5.14V5V8

Open5.14V5.14V5V10

GndGndGndGnd12

Open12.3V0V12V14

GndGndGndGnd16

0.73V24.8V0V24V18

Open4.67V0VINV.ON20

Open0V0VErr Out22

Open3.2V0V2PDIM24

Diode CheckRun STBYLabelPin

P201 Even "SMPS" to P700 "Main PWB"

ncncncnc1

GndGndGndGnd3

GndGndGndGnd5

Open5.14V5.14V5V7

Open5.14V5.14V5V9

GndGndGndGnd11

Open12.3V0V12V13

GndGndGndGnd15

0.73V24.8V0V24V17

ncncncnc19

Open1.66V0V1BR121

ncncncnc23


P201 Odd "SMPS" to P700 "Main PWB"

1 BR1 (A-DIM) Pin 21 Fixed and not used 2PDIM Pin 24 can vary according to type of signal being processed and the OSD Backlight setting. 0.6V 0% to 3.3V 100%. Output from the video processor chip.


Power Supply P203 to Ballast CN1 Voltage and Diode CheckPower Supply P203 to Ballast CN1 Voltage and Diode Check


Open0V0VError14

Open3.40V0VVBR_B13

Open3.45V0VOn/Off12

Open1.67V0VVBR_A11

GndGndGndGnd10

GndGndGndGnd9

GndGndGndGnd8

GndGndGndGnd7

GndGndGndGnd6

0.729V24.52V0VVBL5

0.729V24.52V0VVBL4

0.729V24.52V0VVBL3

0.729V24.52V0VVBL2

0.729V24.52V0VVBL1


P203 "SMPS" to CN1 "Ballast"


Power Supply Connector SK100 and SK101 Voltage and Diode CheckPower Supply Connector SK100 and SK101 Voltage and Diode Check


AC Voltage Readings Across Pins 1 and 2 for STBY and RUN.

OLN2

OL120Vac

L1


AC Voltage Readings for either pin 1 or pin 2 in STBY and RUN with one lead on Neutral of SK101.

OLn/a2

OL120Vac

n/a1


SK100 "SMPS" to AC IN SK101 "SMPS" to MASTER POWER SWITCH

SK101

SK100

Bottom Right of SMPS

Live

Neutral

With the Master Power Switch Closed (On) AC flows.When Open (Off) AC open and does not flow.


Ballast Board

The Ballast receives it B+ from the Switch Mode Power Supply. 24V (CN1 pins 1~5) is delivered when the “Power On” command arrives at the SMPS.

The Backlights are turned on with the “Inverter On”command arrives. INV-ON is sent from the Main board through the SMPS to the Ballast.

The Backlights are manipulated by the control signal “P-DIM (Digital Dimming)” CN1 pin 13.

BALLAST SECTIONBALLAST SECTION


General Backlight InformationGeneral Backlight Information

To Backlights Over 1.2KV

Currently, number of lamps “Unknown”

To Backlights Over 1.2KV

EEFL (External Electrode Fluorescent Lamp)LOW COST Large number of lamps driven by a single inverter

One Continuity path One Continuity path

Ballast


Simple structure, Low price

Complicated structureSimple structure

Lamp manufacturing processLamp assembly structure

Low CostLarge number of Lamp Drive by single inverter

Introducing EEFLIntroducing EEFL


Key: Long Life Time

• For CCFL, Hg gas is consumed mainly near the internal electrode• For EEFL, longer life time is expected because there is no internal electrode consuming Hg gas

EEFL Compared to CCFL ElectrodesEEFL Compared to CCFL Electrodes


Ballast PWB Assembly (With Shield) LayoutBallast PWB Assembly (With Shield) Layout

CN1

To BacklightRight Side

To BacklightLeft Side

Transformers

Ballast Start Det LED (LED1)

F110A/125V

p/n EAY60713901


Ballast PWB Assembly LayoutBallast PWB Assembly Layout

CN1

Ballast Start DetLED LED1



Transformers

F110A/125V

WarningDo not Run the Ballast with Shield Removed.


Ballast Transformer WaveformsBallast Transformer Waveforms

T1 or T2 Pin 6T1 or T2 Pin 1

34V p/p 48kHz22.2V p/p 48kHz

Transformers

PrimarySide

Warning, secondary is over 1.2Kv

FET Drivers WarningDo not Run the Ballast with Shield Removed.

16 16

T1 T2

IC100Mstar

32LH30 P700 on Main PWB To Power Supply P201 Out P203 To Ballast MCN132LH30 P700 on Main PWB To Power Supply P201 Out P203 To Ballast MCN1

R7430Ω

A-DIM

PWM-DIM

INV On/Off

3.29V

VBR-APWB-0

VBR-BPWM-2

GPIO 28

GPIO 27

20

24

21

P700

POWER SUPPLY

PWR2.86V

2

13

14

17

18

CN1

24V

BALLAST

12INV On/Off

1.67V

13

11BR1

PWM-DIM

ERR 0Vn/c (Not Used)

2214ERR

P201P203 MAIN PWB

20

24

21

22

2

5

4

12

13

11

3

14

E5 Relay On

R244 100Ω

R7590Ω

R7191KΩ

Q702

Inverter OnR703 10KΩ

R237 100Ω

R706 10KΩ

Stby 5V

Q701

G5

5V GeneralStby 5V7 8 9 10

12V

24V24VReg

14

17

18

13

21

24VReg

24V

12VReg

SMPSControler

2

5

4

1

3

L733

R7044.7Ω

L700

R189 100Ω

R185 1.2KΩ

AB12

AB13

VBR-A (Analog Diming) Manipulates the Backlight Brightness as well.But this line is not used.

PWM-DIM (PWM Dimming) Manipulates the Backlight Brightness via Customer’s OSD.Manipulates the Backlight Brightness via the video processor IC100. Darker Picture, Darker Backlights to facilitate improved Contrast Ratio. 0.6V ~ 3.3V Range

40


Backlight Drive Signal Dimming Signal EffectsBacklight Drive Signal Dimming Signal Effects

PWMDIMmanipulates

the Burst Triangle

Oscillator in the ballast drive IC.

ADIM also manipulates

the Burst Triangle

OscillatorBut it is not

used.


Ballast Removal (Heat Sink and Insulators)Ballast Removal (Heat Sink and Insulators)

Protects the Output FETs

Insulator

Insulator

Be sure to replace “All” heat sink materials and

insulators.

Cut Out

AlignmentNotch

Alignment Notch

Heat Transfer Material

Shield

p/n EAY60713901

Do not Runthe Ballast with ShieldRemoved.

Do not Runthe Ballast with ShieldRemoved.


Ballast Connector CN1 Voltage and Diode CheckBallast Connector CN1 Voltage and Diode Check


Open0V0VError14

Open3.40V0VVBR_B13

Open3.45V0VOn/Off12

Open1.67V0VVBR_A11

GndGndGndGnd10

GndGndGndGnd9

GndGndGndGnd8

GndGndGndGnd7

GndGndGndGnd6

Open24.52V0VVBL5

Open24.52V0VVBL4

Open24.52V0VVBL3

Open24.52V0VVBL2

Open24.52V0VVBL1


CN1 "Ballast" to P203 "SMPS"


LCD Controller BoardThe T-Con IC UC1 receives from the Main Board LVDS at CN1 12 Bit

LVDS Signals (Video) which it processes into TFT Drive Signals which through connectors CN3 and CN4 controls the LCD Panel.

12V is supplied to the T-Con Board on connector CN1 from the Main Board(Easily measured at fuse F1 2A and 125V).

There are two DC to DC converters that create (17V developed at the cathode of D8).(3.3V developed at the cathode of D9). Protected by Fuses FL3 and FL4.

The 3.3V can also be measured at the ribbon connectors delivering signals to the TFT panel (CN3 pins 57, 58 or 59) and (CN4 pins 2, 3 or 4).

Also at the Regulator US2 the 1.5V can be checked. Protected by Fuses FL1 and FL2.

TT--CON (TFT DRIVE) SECTIONCON (TFT DRIVE) SECTION


TT--CON (TFT Drive) PWB (With Shield)CON (TFT Drive) PWB (With Shield)Remove the 3 Screws in the T-CON shield and the 1 screw from the top of the vertical brace.

Remove the T-CON shield by sliding it left or right from under the vertical brace.

Note: There are Chocolate (Heat Transfer) material pieces underneath the T-CON Heat sink.

They dissipate heat from the UC1 and US3 ICs.Be sure to return these pieces when reinstalling

the Heat Sink (Shield).


TT--CON (TFT Drive) PWB RemovalCON (TFT Drive) PWB Removal

Remember to reinstall the 3 screws for the Service Position if the T-CON board needs to be turned on for test purposes. These would already be removed when removing the shield.

CN4 CN3

CN1

Disconnect CN3, CN4 and CN1. See next slide for details.

UC1

US3


To remove the flex cables to the TFT Panel, CN3 or CN4: Place a soft thin object like a fingernail underneath the black locking tab and gently pull forward.

(Shown by the arrows in Fig 1)

Fig 1

Fig 2

Unlocked

Flip the lock up and back from the flex cable. Then the flex cable can be easily removed. To remove the LVDS cable CN1;

Press in on the two tabs and slowly rock the cable out of the connector.

(Shown by the arrows in Fig 3)

Fig 3 (CN1) LVDS

UNLOCKING CN3, CN4 and CN1UNLOCKING CN3, CN4 and CN1

The locking tab is flipped upward

Press In Press In

Pull Out

CN3 or CN4 Locked

TT--CON (TFT Drive) PWB Removal ContinuedCON (TFT Drive) PWB Removal Continued


TT--CON (TFT Drive) PWB (Shield Removed) Components IdentifiedCON (TFT Drive) PWB (Shield Removed) Components Identified

F1

CN4 CN3

CN1

UC1

To Main PWB

To TFT Panel To TFT Panel

Remember to replace screws for ground purposes if testing the PWB.

D9

T-CON p/n: EAT60666401

D8

US2

FL3/FL4

FL1/FL2 US3


TT--CON (TFT Drive) PWB ChecksCON (TFT Drive) PWB ChecksT-CON PWB (Locations)

1.5V

3.3V

Gnd US2

Check the Regulator US2 for Correct Voltage

Check Fuse F1 for 12Vfrom CN1 Pins 48, 49, 50, and 51.

F1

CN1

Cathode 3.3V

D9

D8Cathode

17V

Check 1.5V Fuses

FL1 / FL2

Check 3.3V FusesFL3 / FL4

Check Fuse

F1 (12V)

Black band indicates Cathode


TT--CON (TFT Drive) PWB Component Diode ChecksCON (TFT Drive) PWB Component Diode ChecksT-CON PWB (Locations)

0.35V[ 0.25V ]

0.68V[ 0.13V ]

Gnd

US2

Meter in Diode Mode, black lead on Gnd lug.

F1

CN1

Cathode 0.68V

[ 0.14V ]D9

D8Cathode

Open[ 0.61V ]

FusesFL1 / FL2

0.35V[ 0.25V ]

FusesFL3 / FL4

0.68V[ 0.14V ]

Fuse F13.18V

[ 0.57V ]

Black band indicates Cathode

Diode Check taken with meter in Diode Mode with all Connectors RemovedGndLug

GndLug

(-)

(+) Reading without brackets on TP

Reading in brackets [ ] on TP

NoGood


TT--CON (TFT Drive) PWB Panel Voltage Development ChecksCON (TFT Drive) PWB Panel Voltage Development ChecksDiode Check taken with meter in Diode Mode with all Connectors Removed

GndLug

-7.26V

-3.24V

Gnd 25.7V

15.5V19.7V

D10 D11

16.9V

3.3V

D9

24.3V

3.3V

12VLVDS

Gnd

12VLVDS

12VLVDS

7.4V 7.4V

16.7V

7.4V 7.1V

Gnd


CN4 CN3

T-CON PWB

TT--CON (TFT Driver) Board CN3 and CN4 (Panel Voltage Checks)CON (TFT Driver) Board CN3 and CN4 (Panel Voltage Checks)

16.9V 3.3V 16.9V 3.3V

-7.26VPin 5

24.3VPin 6

16.9VPins 55, 56

3.3VPins 58,59

-7.26VPin 56

24.3VPin 55

16.9VPins 5,6

3.3VPins 2,3


TT--CON PWB LVDS Connector CN1 Pin IdentificationCON PWB LVDS Connector CN1 Pin Identification

1 51

CN1

12V forT-CON PWB

Not used on T-CON

Video Video

Video

Video

Video

Video

TA ClockTB Clock

10bit TA or 10bit TB

Resolution

32LH30 T-CON PWB LAYOUT32LH30 T-CON PWB LAYOUT

Warning:T-Con PWB under shield. Be sure to reinsert screws before operating set with shield removed.

(-5V)Pin 56

(24.3V)Pin 55

(16V)Pins 5,6

(3.3V)Pins 2,3

(-5V)Pin 5

(24.3V)Pin 6

(16V)Pins 55,56

(3.3V)Pins 58,59

63V/1.5A

CN4

US21 (0V)2 (1.8V)3 (3.3V)

UC1

D8

D9

L1

L2

3.3V

F1 (12V)

CN1 16.9V

FL1

FL2

FL3FL4

1.5V Fuses

3.3V Fuses

T-CON

CN3

16.9V 3.3VC110C115 3.3V

16.9V

24.3V

D10A

C

A

-7.26V

VDD

12V LVDS US3

FL7Gnd

FL8Gnd

Pins48-51

C84

3.3V

12V LVDS

R92

Pin 23,24

Pin 25,26

24V Pin 8

12V LVDS12V Pin 37,38

54


TT--CON PWB Connector CN1 to Main PWB Voltage and Diode CheckCON PWB Connector CN1 to Main PWB Voltage and Diode Check


CN1 CONNECTOR "T-CON PWB“ to P800 "Main"789

10

1.95V0V0VLVDS-SELOpen*0V0VPWM-DIM1.75V0V0VOPC-OUT1.75V0V0VOPC-EN1.1V1.2V0VTXA4+1.1V1.1V0VTXA4-

1213

1.1V1.2V0VTXA3+1.1V1.1V0VTXA3-1.1V1.1V0VTXA0+1.1V1.2V0VTXA0-

14151617

1.1V1.2V0VTXA2+

1.1V1.1V0VTXA2-

1920


32232425

*Pin 8 PWM-DIM 3.15V (Max 100%) to 0.6V (Min 0%) Customer’s Menu Backlight setting. But is Not Used by T-CON.(See arrow on the T-CON PWB CN1 indicating pin 1)

1.1V3.24V0VBIT-SEL271.1V1.2V0VTXB4-1.1V1.2V0VTXB3+

29

1.1V1.1V0VTXB3-3031

1.1V1.1V0VTXBC+321.1V1.2V0VTXBC-331.1V1.1V0VTXB2+35

0.8V1.1V0VTXB0+1.1V1.2V0VTXB0-

1.1V1.2V0VTXB2-360.8V1.1V0VTXB1+381.1V1.2V0VTXB1-39

4041

3.18V12.1V0VLVDS 12V483.18V12.1V0VLVDS 12V493.18V12.1V0VLVDS 12V50Gnd12.1V0VLVDS 12V51

Pins 1, 11, 18, 21, 26, 34, 37, 42~46 are all GroundPins 1~6 and 47 has No Connection


Main PWB IC100 Video Processor OverviewMain PWB IC100 Video Processor Overview

Input Signal Processing IC100 is the main Microprocessor and the main Signal Processor and is responsible for :

• ATSC, NTSC, and QAM reception and processing• RS 232 service only Port (software upgrades and home theater environment).• Wired Remote Port• (1) Component Input Y, Pr, Pb and Audio L R• (2) HDMI Inputs (back) (1) HDMI (Side Input) • RGB PC and (PC Audio)• USB (software upgrades using flash drive). USB located on the Rear.• AV Composite (1 Rear and 1 Side Input)• SIF and SAP

Output Signals

•20 Bit LVDS (20 Pin) to the T-CON Board• Audio output signals to the Speakers• Digital Audio Output Coaxial and Optical• ON OFF Controls to the SMPS turning on low voltage generation and Backlights• Backlight intensity control signal (Digital Dimming) P-DIM sent to the Ballast through

the SMPS.


Removing the Main PWBRemoving the Main PWB

Remove any tape holding down any

cables.

Remove the remaining 4 screws indicated by

the arrows.

P800

P600 P1204

Flip the locking tabs upward, pull the LVDS ribbon out.

NOTE: Be sure to check on top and behind the Video Processor IC. Look for a piece of

Chocolate(Heat Transfer Material).

Be sure to transfer to new PWB if present.

P700


Main PWB Main PWB LayoutLayout

VIDEO PROCESSOR IC100 RUNS HOT, THIS IS NORMAL.

1

19

LD1000 Tuner OK

when Green

P700 To

SMPS

P800

P1204

X100USB

TunerTU1001

To Front PWB Assembly

P800 to T-CON PWB

To Speakers

Look carefully on top and behind the Video Processor IC for Chocolate

(Heat Transfer) material. Be sure to transfer to new PWB if replaced.

For Software Upgrade via Jig

SW100Reset

X1005

P600

LD1000IC100

Microprocessor and

Video Processor

Q702

Q706


Main PWB Main PWB (Back View)(Back View) Voltages given on the 11X17 foldout “Interconnect Diagram”

IC1003

IC1002

IC102IC601

IC702

IC1201

IC500IC501

IC1200

IC104

Q600

Q701

Q703Q704

Q705Q102

Q103

Q104

IC503

Q1000

Q1001D503

D500

19

1

D1223

D501D502

Q107

IC103

TUNERTU1001

IC7051.26V_VDDC

1 (0.78V)2 (Gnd)3 (5V)4 (5.9V)5 (5V)6 (1.3V)7 (1.3V)8 (3.16V)

MAIN (Digital) Board

To Speakers

Reset IC100

IC10048vsb/QAM

Q7061 (5V)2 (0.48V)3 (0.48V)4 (6V)5-6 (12.3V)7-8 (5V)

IC600Audio56 Pin

To SM

PS

PW

B

L726

L710

Q706 Switch(12V LVDS)(5V General)

X100525 Mhz

X10012 Mhz

IC1003

IC601

IC701

P600

P700

P1204

LD1000

To Front Control

IC105

IC7043.3V-FE1 (0.78V)2 (Gnd)3 (5V)4 (7.4V)5 (2.12V)6 (3.28V)7 (3.28)8 (5V)

IC7011.8V_DDR

1 (N/C)2 (3.18V)3 (3.18V)4-5 (N/C)6 (1.87V)7 (0.8V)8 (Gnd)

Q702Inv-On Control

Gnd0V(0.6V)

3.85V (0V)

IC1000

1.2V_PVSB1 (N/C)2 (3.2)3 (3.2V)4-5 (N/C)6 (1.2V)7 (0.8V)8 (Gnd)

IC105HDCP EEPROM

1-2 (Gnd)3 (5V)5-6 (0V)4-7 (Gnd)6 (1.2V)7 (0.8V)8 (5V)

IC101

Flash Memory1-2 (0V)3-4 (0V)5-6 (0V)7-8 (3.2V)

IC10035V-Tuner

source1 (12V)2 (Gnd)3 (8.94V)

IC1002

5V-Tuner1 (8.94V)2 (2.37V)3 (5V)4 (N/C)5 (Gnd)

IC702 (3.3V_ST)

1 (5V)2 (3.3V)3 (0V)

IC6011.8V Amp1 (3.2V)2 (1.8V)3 (0V)

IC107Power Det

1 (Gnd)2 (Reset) .3V3 (3.28V)

IC107

IC7043.3V_FE

IC7051.26V_VDDC

IC100Video

ProcessorMstar

P800

( ) = Off

IC702

Also, Main Micro

Q701PWR On5V (5V)

5V (0V)

0V (0.6V)

To T-CON (LVDS)

IC500 / IC501HDMI EDID

IC500 IC501

IC1200R,G,B PC/DDC

1

TUNER

16 SIF

19 Video

4 (5V)

12 DIF +13 DIF -

15 (5V)

Grayed Out ICs are located on Back*

E

C

BKEY

Main PWB Component IdentificationMain PWB Component Identification

60


Main PWB X100 and X1005 CheckMain PWB X100 and X1005 Check

X1005 LocationX100

Location

2.28Vp/p12Mhz

Set on or off

X400

IC100 Microprocessor Crystal

MAIN PWB

4.95Vp/p 25Mhz

X1005

Crystal for Tuner Controller IC1004

Only when set is on

X1001.62V

1.58V

1.48V

1.55V


Main PWB LD1000 FunctionMain PWB LD1000 Function

Main PWBLD1000 Location

Use LD1000 as a visual aid.This lets you know if the tuner internal PLL

(Phase Locked Loop) system is locked. Illuminated PLL is normal. Off is abnormal tuner lock.

LD1000


Main PWB Tuner with Shield Off (Pin ID)Main PWB Tuner with Shield Off (Pin ID)

1

19

18

4

13

12

9

8


MAIN PWB

Main PWB Tuner Video and SIF Output CheckMain PWB Tuner Video and SIF Output Check

Tuner Location

450mVp/p

Pin 19 “Video”Signal

Pin 16 “SIF”Signal

2.24Vp/p

USING COLOR BAR SIGNAL INPUT

Pin 12 and Pin 13“Dig IF” Signal

Note:“Dig IF” Signal only when receiving a Digital Channel.

700mVp/p

Pin 1

Note: “Video Out” Signal only when receiving an analog Channel.

Possibility of two different tuners


Main PWB Tuner Clock and Data LinesMain PWB Tuner Clock and Data Lines

Pin 8 SDA

100uS1V per/div 5V p/p

Pin 9 SCL

100uS1V per/div 5V p/p

Note:SCL and SDA only active

during an actualChannel Change.


MAIN PWB

Main PWB LVDS P800 Video Output CheckMain PWB LVDS P800 Video Output Check

P800Location

To confirm that the Main PWB is outputting Picture Content signals, check P800 (LVDS) cable for output. Check pins 11-14,16-17, 19-24, 27-30, 32-33 and 35-40. Pins 35-36 carry the clock for TA and 19-20 carry the clock for TB. These signals vary from each other, but looking for signals like the ones shown below on any of these pins will confirm the output of video content. This signal is using standard SMTE Color Bar output from a generator as the input source.

Pin 1

Pin 39

This is just a sample of two pins on the LVDS.There are 8 pins on P801 carrying video.

2uS

500nS

2uS

500nS

Pin 51

Pin 1, 2, 3, 4 (LVDS 12V)

P800

Pin 11


Main PWB Connector P700 to Power Supply Voltage and Diode CheckMain PWB Connector P700 to Power Supply Voltage and Diode Check


1.33V3.2V0V2PWM-DIM24Gnd0V0VErr Out22

3.17V4.67V0VINV ON20Open24.8V0V24V18GndGndGndGnd16Open12.3V0V12V14GndGndGndGnd121.5V5.14V5.14V5.2V101.5V5.14V5.14V5.2V8GndGndGndGnd6GndGndGndGnd42.8V4.99V0VPWR-ON2


Openncncnc23Open1.65V0V1BR121Openncncnc19Open24.8V0V24V17GndGndGndGnd15

Open12.3V0V12V13GndGndGndGnd111.5V5.14V5.14V5.2V91.5V5.14V5.14V5.2V7GndGndGndGnd5GndGndGndGnd3

Openncncnc1


1BR1 (A-DIM) Pin 21 Fixed and not used 2PDIM Pin 24 can vary according to type of signal being processed, OSD Backlight setting. 0.6V 0% to 3.3V 100% and the Intelligent Sensor. Output from the video processor chip.

P700 “Main PWB" to P201 “SMPS PWB"Odd Pins Even Pins


Main PWB LVDS Connector P800 Pin IdentificationMain PWB LVDS Connector P800 Pin Identification

12V forT-CON PWB

Not used on T-CON

Video Video

Video

10bit TA or 10bit TB

Resolution

Video

51 1

P800

Video

Video

TA Clock

TB Clock


Main PWB Connector P800 to TMain PWB Connector P800 to T--CON Voltage and Diode CheckCON Voltage and Diode CheckDiode Check taken with meter in Diode Mode with all Connectors Removed

P800 "Main" CONNECTOR to CN1 "T-CON PWB“

*Pin 44 PWM-DIM 3.15V (Max 100%) to 0.6V (Min 0%) Customer’s Menu Backlight setting. But is Not Used by T-CON.

(See arrow on the T-CON PWB CN1 indicating pin 1)

Pins 6~10, 15, 18, 26, 31, 34, 41, 51 all Ground

45444342

1.95V0V0VLVDS-SELOpen*0V0VPWM-DIM1.75V0V0VOPC-OUT1.75V0V0VOPC-EN

1.1V3.24V0VBIT-SEL25

1.1V1.2V0VTXA4+1.1V1.1V0VTXA4-

4039


38373635

1.1V1.2V0VTXA2+

1.1V1.1V0VTXA2-

3332


30

1.1V1.2V0VTXB4-1.1V1.2V0VTXB3+

23

1.1V1.1V0VTXB3-2221




1211

n/cn/cn/cN/C5, 46~50

3.18V12.1V0VLVDS 12V43.18V12.1V0VLVDS 12V33.18V12.1V0VLVDS 12V2Gnd12.1V0VLVDS 12V1

292827


Main PWB Connector P1204 to (Ft. IR/LED Control) Voltage and DMain PWB Connector P1204 to (Ft. IR/LED Control) Voltage and Diode Checkiode Check


P1204 CONNECTOR "MAIN PWB" to P1 "Front IR / LED PWB Assy"

Open3.29V0VPOWER On/Off120.76V3.29V3.29V3.3V_ST11GndGndGndGnd10

Open4.8V4.8VIR9GndGndGndGnd8GndGndGndGnd71.5V5.1V5.1V5V ST61.1V3.3V3.3VKey251.4V3.3V3.3VKey14GndGndGndGnd3

1.67V3.3V3.3VSDA2Open3.3V3.3VSCL1


1


Main PWB Connector P600 to Speakers Voltage and Diode CheckMain PWB Connector P600 to Speakers Voltage and Diode Check


SPK-L(+)

SPK-L(-)

SPK-R(+)

SPK-R(-)

LABEL

2.6V12.4V0V4

2.6V12.4V0V3

2.6V12.4V0V2

2.6V12.4V0V1

Diode CheckRunSBYPin

P600 CONNECTOR "Main" to "Speakers"

Use speaker out to test for defective Audio Amp IC600

1


FRONT IR AND KEY BOARD SECTIONFRONT IR AND KEY BOARD SECTION

The Front IR board contains the Infrared receiver and the Power LEDs.

This board receives its B+ (STBY5V) from the Main PWB. It also has connections to the side Key board. The 3.3V pull up for the keys is routed from the Main board through the Front IR board to the Side Key board.

The Front Power LEDs pulsate or appear to move. This is accomplished using multiple LEDs and a driver IC U2 which communicates with the Main board via Clock and Data lines.

There are several Zener diodes on the board as well and since it receives STAND-BY 5V (STBY 5V) it could make the Power Supply or the Main boardappear to be defective if a short was introduced to the stand by line.


Front PWB Assembly (IR and Power LED) Layout (Front and Back VieFront PWB Assembly (IR and Power LED) Layout (Front and Back View)w)

To Main PWB

IR Sensor

P1P2 To Main PWB

To SideKey PWB

Power LEDs

U2 LED driver

Note: STBY5V is routed to this board. Possibility of a short.


Front IR/LED Control Connector P1 and P2 to Main Voltage and DiFront IR/LED Control Connector P1 and P2 to Main Voltage and Diode Checkode Check


2.2V

Open

Gnd

2.5V

2.41V

Gnd

2V

Open

Open

Gnd

2.8V

2.8V

Diode Check

3.3V3.3VSCL13.3V3.3VSDA2GndGndGnd33.3V3.3VKey143.3V3.3VKey255.1V5.1V5V ST6GndGndGnd7GndGndGnd84.8V4.8VIR9GndGndGnd10

3.29V3.29V3.3V_ST113.29V0VPOWER On/Off12

RunSTBYLABELPin

P1 Connector “IR/LED Control PWB“to "MAIN PWB" P404

P2 Connector “IR/LED Control PWB“to “Side Key" P3000

Gnd

Key2

Gnd

Key1

Label

Gnd

Open

Gnd

Open

Diode Check

GndGnd4

3.3V3.3V3

GndGnd2

3.3V3.3V1

Run STBYPin


Side Key AssemblySide Key Assembly

To Main PWBP3000

SW3008

SW3007

SW3006

SW3005

SW3004

SW3003

SW3002

SW3001


Side Key Assembly P3000 InformationSide Key Assembly P3000 InformationP3000 Resistance Measurements with Key pressed.

CH (Up)CH (Dn)

Volume (+)Volume (-)

KEY

10K Ohms4.8K Ohms1.8K Ohms270.5 Ohms

Pin 3 measured from Gnd

10K Ohms4.8K Ohms1.8K Ohms270.5 Ohms


EnterMenuInput

Power

KEY

P3000 Voltage Measurements with Key pressed.

CH (Up)CH (Dn)

Volume (+)Volume (-)

KEY

2.24V1.65V

0.906V0.179V


2.24V1.65V

0.906V0.179V


EnterMenuInput

Power

KEY

P3000 Connector “Side Key" to “IR/LED Control PWB“ P1

GndKey2GndKey1

Label

GndOpenGndOpen

Diode Check

GndGnd43.3V3.3V3GndGnd23.3V3.3V1

Run STBYPin

1

4


Main Power Switch NoteMain Power Switch Note

Pay attention to the Main Power Switch. Don’t forget to

leave it in the On Position.

ON OFF


11 X 17 Foldout Section11 X 17 Foldout Section

This section shows the 11X17 foldout thatThis section shows the 11X17 foldout that’’s available in the Paper s available in the Paper and Adobe version of the Training Manual.and Adobe version of the Training Manual.

IC7051.26V_VDDC

1 (0.78V)2 (Gnd)3 (5V)4 (5.9V)5 (5V)6 (1.3V)7 (1.3V)8 (3.16V)

32LH30 INTERCONNECT DIAGRAM

Power Supply

P201

F501

F100

SK100L

N

6.3A / 250VA/C Fuse

335V Actual Reading3.15A / 250V Rating

P101

TO TFT MODULE

SMPS TEST 1: To Force Power Supply On.Disconnect P800 on Main PWB.Jump pin 7,8,9 or 10 (5V) to pin 2 using a 10K resistor. (Test Voltage Outputs 12V, and 24V).

SMPS TEST 2: Jump pin 2 to pin 20 (INV-ON).(Ballast and all voltages should turn on).

20 bit LVDS

Warning:T-Con PWB under shield. Be sure to reinsert screws before operating set with

shield removed.

12V to T-CON Pin 48 ~ 51

P800 “Main” TO CN1 “T-CON”

11Gnd6

K13A60DQ602K6A60DQ101, Q102FSU10B60

D201, D251, D252, D255

Gen PT #

MBRF10100CT

D602

LOC

TO TFT MODULE

LED1

T2T1

D255

D201D252

D251

Q102

Q101

Q602

D602

A/C

Rec

tifie

r 4A

+

-

~~

CN1

P203

SK101

789

10

1.95V0V0VLVDS-SELOpen*0V0VPWM-DIM1.75V0V0VOPC-OUT1.75V0V0VOPC-EN1.1V1.2V0VTXA4+1.1V1.1V0VTXA4-

1213

1.1V1.2V0VTXA3+1.1V1.1V0VTXA3-1.1V1.1V0VTXAC+1.1V1.2V0VTXAC-

14151617

1.1V1.2V0VTXA2+

1.1V1.1V0VTXA2-

1920


32232425

1.1V3.24V0VBIT-SEL271.1V1.2V0VTXB4-1.1V1.2V0VTXB3+

29

1.1V1.1V0VTXB3-3031




4041

3.18V12.1V0VLVDS 12V483.18V12.1V0VLVDS 12V493.18V12.1V0VLVDS 12V503.18V12.1V0VLVDS 12V51

MAIN (Digital) Board

To Speakers

Reset IC100

IC10048vsb/QAM

Q7061 (5V)2 (0.48V)3 (0.48V)4 (6V)5-6 (12.3V)7-8 (5V)

IC600Audio56 Pin

To SMPS

PW

B

L726

L710

Q706 Switch(12V LVDS)(5V General)

X100525 Mhz

X10012 Mhz

IC1003

IC601

IC701

P600

P700

P1204

LD1000

To Front Control

IC105

IC7043.3V-FE1 (0.78V)2 (Gnd)3 (5V)4 (7.4V)5 (2.12V)6 (3.28V)7 (3.28)8 (5V) IC701

1.8V_DDR1 (N/C)2 (3.18V)3 (3.18V)4-5 (N/C)6 (1.87V)7 (0.8V)8 (Gnd)

Q702Inv-On Control

Gnd0V(0.6V)

3.85V (0V)

IC1000

1.2V_PVSB1 (N/C)2 (3.2)3 (3.2V)4-5 (N/C)6 (1.2V)7 (0.8V)8 (Gnd)

IC105HDCP EEPROM1-2 (Gnd)3 (5V)5-6 (0V)4-7 (Gnd)6 (1.2V)7 (0.8V)8 (5V)

IC101

Flash Memory1-2 (0V)3-4 (0V)5-6 (0V)7-8 (3.2V)

IC10035V-Tuner

source1 (12V)2 (Gnd)3 (8.94V)

IC1002

5V-Tuner1 (8.94V)2 (2.37V)3 (5V)4 (N/C)5 (Gnd)

IC702 (3.3V_ST)

1 (5V)2 (3.3V)3 (0V)

IC6011.8V Amp1 (3.2V)2 (1.8V)3 (0V)

IC107Power Det

1 (Gnd)2 (Reset) .3V3 (3.28V)

IC107

IC7043.3V_FE

IC7051.26V_VDDC

Grayed Out ICs are located on Back*

IC100Video

ProcessorMstar

P800

( ) = Off

IC702

Also, Main Micro

Q701PWR On5V (5V)

5V (0V)

0V (0.6V)

To T-CON (LVDS)

IC500 / IC501HDMI EDID

IC500 IC501

IC1200R,G,B PC/

DDC

1

TUNER

16 SIF

19 Video

4 (5V)

12 DIF +13 DIF -

15 (5V)

24V LED

Tuner Data

CN1 CONNECTOR "T-CON” PWB CON PWB

Pin Diode TestRun VSTBYPin ID Pin Diode TestRun VSTBYPin ID

Ballast

48Khz input

1.2KV1.2KV

Side (Key) C

ontrols

GndKey2GndKey1

Label

GndOpenGndOpen

Diode Check

GndGnd43.3V3.3V3GndGnd23.3V3.3V1

Run STBYPinJ3

J1

Front PWB Assembly(Interface)

IR ReceiverPower Button

P203 "SMPS" to CN1 "Ballast"

Open0V0VError14Open3.40V0VVBR_B13Open3.45V0VOn/Off12Open1.67V0VBVR_A11

GndGndGndGnd10GndGndGndGnd9GndGndGndGnd8GndGndGndGnd7

GndGndGndGnd60.729V24.52V0VVBL50.729V24.52V0VVBL40.729V24.52V0VVBL3

0.729V24.52V0VVBL20.729V24.52V0VVBL1


Open0V0VError14Open3.40V0VVBR_B13Open3.45V0VOn/Off12Open1.67V0VVBR_A11

GndGndGndGnd10GndGndGndGnd9GndGndGndGnd8GndGndGndGnd7

GndGndGndGnd60.729V24.52V0VVBL50.729V24.52V0VVBL40.729V24.52V0VVBL3

0.729V24.52V0VVBL20.729V24.52V0VVBL1


MainPowerSwitch

P101 o J3 Front PWB

Note: CN1 Pin 1 is P800 Pin 51



16 16

On then Off after ballast

fires

22V p/p 34V p/p

Pin 1 Pin 6

Do not run Ballast without

heat sink attached

Pins 1, 11, 18, 21, 26, 34, 37, 42~46 are all GroundPins 1~6 and 47 Are not used

Pin 21 BR1 (ADIM Analog Dimming) Fixed and not used

Pin 24 PDIM (Digital Dimming) can vary according to type of signal being processed and the OSD Backlight setting. 0.6V 0% to 3.3V 100%. Output from the Video Processing chip IC100.

P201 Even“SMPS” to P700 “Main”

Open4.99V0VPWR-ON2

Open0V0VErr Out22

Open3.2V0VPDIM24

CheckRun STBYLabelPin

ncncncnc1

GndGndGndGnd3,4,5,6

ncncncnc23

Open5.14V5.14V5V7,8,9,10GndGndGndGnd

Open12.3V0V12VGndGndGndGnd

0.73V24.8V0V24V

GndGndGndGnd11,12Open12.3V0V12V13,14GndGndGndGnd15,16

0.73V24.8V0V24V17,18ncncncnc19

Open4.67V0VINV.ON20Open1.66V0VBR121

P1204 CONNECTOR "MAIN PWB" to J1 "Front IR / LED PWB

Open3.29V0V120.76V3.29V3.3V_ST11GndGndGndGnd10Open4.8V4.8VIR9GndGndGndGnd8GndGndGndGnd71.5V5.1V5.1V5V ST61.1V3.3V3.3VKey251.4V3.3V3.3VKey14GndGndGndGnd3

1.67V3.3V3.3VSDA2Open3.3V3.3VSCL1


Open3.29V0VPOWER On/Off0.76V3.29V3.29VGndGndGndOpen4.8V4.8VGndGndGndGndGndGnd1.5V5.1V5.1V1.1V3.3V3.3V1.4V3.3V3.3VGndGndGnd

1.67V3.3V3.3VOpen3.3V3.3V

Diode CheckRun STBYLabel

E

C

BKEY

(-5V)Pin 56

(24.3V)Pin 55

(16V)Pins 5,6

(3.3V)Pins 2,3

(-5V)Pin 5

(24.3V)Pin 6

(16V)Pins 55,56

(3.3V)Pins 58,59

US363V/1.5A

CN4

US21 (0V)2 (1.8V)3 (3.3V)

UC1

D8

D9

L1

L2

3.3V

F1 (12V)

CN1 16.9V

FL1

FL2FL3FL4

1.5V Fuse

s

3.3V Fuses

T-CON

CN3

16.9V 3.3VC110C115 3.3V

16.9V

24.3V

D10A

C

A

-7.26V

VDD

12V LVDS

FL7GndFL8

Gnd

Pins48-51

C84

3.3V

12V LVDS

R92

Pin 23,24

Pin 25,26

24V Pin 812V

LVDS12V Pin 37,38

32LH3032LH30Direct View LCD

This concludes the 32LH30training presentation.

training lcd lg 32lh30

Documents

burst triangle

ground connection

ac voltage

master power

osd backlight

video processor

video processor

usb flash