c: 9 l91 m l91tm.qxd (page 1) - a · pdf filetechnical training fl9.1 lcd tv chassis for 2009...

TECHNICAL TRAINING

FL9.1 LCD TVCHASSIS FOR2009

P & F USA, INCSUITE 1003015 WINDWARD PLAZAALPHARETTA, GA 30005

Table of contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Models covered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Formats Supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Software Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Customer Menu Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Board Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Board Level Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Wiring Interconnect Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8Video Signal Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9Video Signal Flow Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Video Signal Flow Block two . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11Audio Signal Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12Audio Signal Flow Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Power Supply Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Protect 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Protect 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17Inverter Signal Flow Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18System Control Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19Service Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20Service Menu Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22Troubleshooting Flow Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23-27Abbreviation List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28Service Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Introduction

The FL9.1 TV chassis is designed for the 2009 model year. The tuning system is designed totune both antenna and cable analog and digital signals. The screen size for this chassis is 32inches with a pixel resolution of 1366 x 768p. Whatever signal is fed to the set will berescaled to fit the resolution of the screen.

Models covered by this chassis:

Model Brand

32PFL3504D/F7 Philips32PFL3514D/F7 Philips32MF339B/F7 MagnavoxLC320SLX SylvaniaLC320SSX SylvaniaLC320EMX Emerson

The following is the Jack panel for the Magnavox version. The Jack panel is the same for allmodels using this chassis.

Supported display resolutions

Computer

Resolution Refresh rate

640 x 480 60Hz720 x 480 60Hz800 x 600 60Hz1024 x 768 60Hz1280 x 768 60Hz1360 x 768 60Hz

Video formats

Resolution Refresh rate

480i 60Hz480p 60Hz720p 60Hz1080i 60Hz

The audio amplifier output is two channels at 10 watts per channel.

Page 1

Connectivity

AV1 Audio L/R in, YPbPrHDMI1 HDMI v1.3, Analog audio L/R inHDMI2 HDMI v1.3

Audio output Digital Coaxial

Side HDMI v1.3, S-video in, CVBS in, Audio L/R in, USB (software upgrade only)

The FL9.1 chassis has the Philips EasyLink (HDMI-CEC) capability. This feature has addi-tional function compared to the 2008 Philips sets. This feature is referred to as CEC in theMagnavox, Sylvania and Emerson products.

Menus

Once the set is programmed after theout of box set up, the menu to the rightappears when pressing the menu but-ton on the remote. The SettingsAssistant is only present on the Philipsbranded product.

The Magnavox, Sylvania and Emersonsets have menus with a similar lookand the same function.

The screen to the right is the Sylvaniafirst screen from the initial out of boxsetting. In the Service mode this iscalled initialized mode. The initial-ized mode will be explained in the ser-vice mode.

In the Sound menu is a new feature, TVSpeakers.

If Speakers EasyLink is selected, thesound from the TV will be re-routed viathe HDMI to a Home Theatre with CECfunction. If On is selected, the TVspeakers remain On. If Off is selected,the speakers in the TV are switchedOff.

Page 2

Setup Menu

In the Setup Menu, channels can be pro-grammed using Autoprogram. Channelscan be deleted from the channel ringusing Channel List. Add Channels can beused to to add channels not picked upduring Autoprogram. Antenna is onlyavailable in the Antenna mode.

Features

Among other things, Location, Child lock,and Closed Caption can be selected inthe Features menu. This is called theDetails menu in the Magnavox, Sylvaniaand Emerson sets.

Out of box, the Child Lock pin is 0000. Ifthe customer forgets their pin, unpluggingthe set will reset the pin to 0000.

Current Software can also be viewed.

To load new software: (Philips Only)

1. Down the latest version from the customer website *.zip.

2. Unzip the file and extract the *.eccfile and load it in to the root

directory of a USB drive.3. Unplug the TV from AC power.

4. Insert the USB drive into the TV.5. Re-apply power and turn the set On.6. Do not unplug the set on use the remote

while the set is programming as this will damage the TV.

Page 3

PICTURE

SOUND

SETUP

FEATURES

LANGUAGE

SETTING ASSISTANTAUTO PICTUREBRIGHTNESSCONTRASTCOLORTINTSHARPNESSCOLOR TEMPERATURE

PERSONALSTANDARDSPORTSMOVIEGAME

NORMALWARMCOOL

AUTO SOUNDEQUALIZERVIRTUAL SURROUND SOUNDAUTO VOLUME LEVELINGTV SPEAKERS

AUTOPROGRAMCHANNEL LISTADD CHANNELSANTENNA

CLOSED CAPTIONCHILD LOCKPC SETTINGSENERGY SAVING MODELOCATIONCURRENT SOFTWARE INFO

ENGLISHESPANOLFRANCAIS

PERSONALSTANDARDMOVIEMUSICNEWS

ONOFFSPEAKERS EASY LINK

CAPTION SERVICEDIGITAL CAPTION SERVICECAPTION STYLE

CHANNEL LOCKUS MOVIE RATINGS LOCKCANADIAN ENGLISH RATINGCANADIAN FRENCH RATINGREGION RATINGS LOCKCHANGE PIN

FIGU

RE

1 - CU

STO

ME

R M

EN

U M

AP

Page 4

Repair

The FL9.1 chassis is designed for board level repair. To assist with troubleshooting, compo-nent level function will be discussed.

The Digital Main board has the microprocessor and signal processing circuits. The HDMI andUSB inputs are located on the Digital Main board. The USB port on this chassis is only usedfor software upgrade.

The Tuner AV inputs and Audio Amplifier are located on the Power Supply board. The powersupply produces a AL3.3V supply for standby power. When the set is turned On, the supplyproduces a 16, 3.3, 3, 7, 5, 9, 13, and 33 volt supplies.

The Inverter Provides the drive voltage for the panel backlights.

Inverter

Power Supply

Digital Main

IR Board

Keyboard

Side Jack

Set Back view

Page 5

Board Level Repair (Figure 2)

The Fl9.1 chassis is designed for board level repair.

Standby mode

In Standby, the processor on the Digital Main board is powered by the AL+3.3V supply. Thisvoltage can be measured on pins 21 and 22 of connector CN301 on the power supply board.

Power On

When the set is turned On by the keyboard or the remote, the processor on the Digital Mainboard switches the P-ON-H1 and P-ON-H2 lines High. This switches the power supply to thefull power mode.

Protect

If any of the supplies fail or the Inverter board is not functioning the Protect lines will causethe set to shut down. In normal operation the Protect lines should read as follows:

Protect 1 2.4VProtect 2 0.0VProtect 3 3.3V

Since a failure in the Protect lines will cause an immediate shutdown, the power supplyshould be forced On to check for missing supplies.

1. First unplug CN301 and CN302 to disconnect the Digital Main board.2. Jumper the AL3.3V supply to P-ON-H1 and P-ON-H2.

P-ON-H1 and P-ON-H2 test points AL3.3V test point (top center)

Page 6

The Function (Keyboard) is hard-wired to the IR Sensor board and it to the Junction board.Only the KEY-IN1 is used for the keyboard. The KEY-IN2 is used in other chassis with a builtin DVD player.

Raw DC is supplied to the Inverter board via connector CN602 on the power supply board.Operating voltages INV+16V, LCD+16, P-ON+3.3V and LCD-6.8V supplies are fed to theInverter board via connector CN201.

The Inverter is switched On by the BACKLIGHT-SW voltage. This voltage is generated onthe Digital Main board and routed through the Power Supply board to the Inverter viaconnector CN201, pin 5 on the power supply. The voltage from the Digital Main to the PowerSupply can be checked on pin 26 of CN301 on the power supply. This voltage should beapproximately 3 volts.

IR Board Junction Board

CN302

CN301

CN201

Page 7

INVERTER CBA

TU301 TUNER UNIT

HDMI-AUDIO(L)-IN

HDMI-AUDIO(R)-IN

AUDIO(L)-OUT

AUDIO(R)-OUT

AC601AC CORD

POWER SUPPLY CBA

DIGITAL MAIN CBA UNIT

HDMI-CONNECTOR-1

HDMI-CONNECTOR-2

HDMI-CONNECTOR-3

LCD MODULEASSEMBLY

CL8011

CN801

2SP(L)-SP(L)+

CL8021

CN802

2SP(R)-SP(R)+

SP801SPEAKERL-CH

SP802SPEAKERR-CH

COMPONENT-Y-IN

COMPONENT-Pb-IN

COMPONENT-Pr-IN

COMPONENT-AUDIO(L)-IN

COMPONENT-AUDIO(R)-IN

VIDEO-IN

AUDIO(L)-IN

AUDIO(R)-IN

S-VIDEO-IN

CN602

CN201

CN1900

CN1001

22 HOT-GND11 ACL

11 GND22 INV+16V33 GND44 BACKLIGHT-ADJ55 BACKLIGHT-SW66 PROTECT377 GND88 LCD+16V99 LCD+16V1010 VGH1111 GND1212 P-ON+3.3V1313 LCD-6.8V1414 VCOM1515 GND

BACKLIGHT

CN1050

21

BACKLIGHT

CN1100

21

BACKLIGHT

CN1150

21

BACKLIGHT

CN1200

21

BACKLIGHT

CN1250

21DIGITAL

AUDIO-OUT(COAXIAL)

JACK CBA

JUNCTION CBA IR SENSOR CBA FUNCTION CBA

CL701A CL701 CL701B11 S-VIDEO-Y-IN

33 S-VIDEO-C-IN22 S-VIDEO-SW

44 GND55 VIDEO-IN

77 AUDIO(L)-IN66 GND

88 GND99 AUDIO(R)-IN

101LC101NC

CL103

CN10111 GND

33 AL+3.3V22 REMOTE

44 LED155 P-ON-H166 KEY-IN177 KEY-IN288 DVD-LED

11 GND

33 AL+3.3V22 REMOTE

44 LED1

44 KEY-IN2

55 P-ON-H166 KEY-IN177 KEY-IN288 DVD-LED

CL102CCL102A

CL103BCL103A

33 KEY-IN122 GND11 AL+3.3V

CN1003

11 GND10 VCOM9 GND8 LCD-6.8V7 P-ON+3.3V6 P-ON+3.3V5 GND4 VGH3 LCD+16V2 LCD+16V1 GND

CN3902

24GND23LLV0(+)22LLV0(-)21LLV1(+)20LLV1(-)19LLN2(+)18LLV2(-)17GND16LLVCLK(+)15LLVCLK(-)14GND13LLV3(+)12LLV3(-)11LLV4(+)10LLV4(-)9LLV5(+)8LLV5(-)7GND6TP5POL4CPV3OE12XAO1STV

CN3701CN301

23

19

21

15

17

22

20

18

16

14

10

12

6

8

13

11

9

7

5

1

34

1

5

3

9

7

2

4

6

8

10

14

12

18

16

11

13

15

17

19

23

2120

2P-ON-H2AUDIO(L)-OUTGNDAUDIO(R)-OUTPROTECT3AMP(L)-OUTGNDAMP(R)-OUTP-ON-H1P-ON+3VPROTECT1GNDP-ON+5VP-ON+5VPROTECT2P-ON+7VGNDGNDP-ON+3.3VP-ON+3.3VAL+3.3VAL+3.3VGND

22

2424 OE22525 REMOTE2626 BACKLIGHT-SW2727 LED12828 BACKLIGHT-ADJ2929 VCOM-PWM

CN3702CN302

23

19

21

15

17

22

20

18

16

14

10

12

6

8

13

11

9

7

5

1

34

1

5

3

9

7

2

4

6

8

10

14

12

18

16

11

13

15

17

19

23

2120

2GNDSPDIFGNDVIDEO-INS-VIDEO-SWS-VIDEO-C-INGNDS-VIDEO-Y-INGNDINPUT1AUDIO(R)INPUT0AUDIO(L)GNDCOM-VIDEO-Y-IN

GNDCOM-VIDEO-Pb-IN

GNDCOM-VIDEO-Pr-IN

AUDIO-MUTESDASCLRESET

22

2424 IF-AGC2525 GND2626 DIF-OUT12727 GND2828 DIF-OUT22929 KEY-IN1

CN303CN4001

23

19

21

15

17

22

20

18

16

14

10

12

6

8

13

11

9

7

5

1

34

1

5

3

9

7

2

4

6

8

10

14

12

18

16

11

13

15

17

19

23

2120

2GNDKEY-IN2DVD-LEDP-ON-H3(NU)DVD-MAIN-PWRDVD-P-ONDVD-REMOTEDVD-SDATADVD-DISC-INGNDDVD-CSGNDDVD-SCLKGNDDVD-DISC-OUTLED-CONTGNDDVD-PrGNDDVD-PbGNDDVD-YGND

22

2424 DVD-AUDIO(L)2525 DVD-AUDIO-MUTE

2626 DVD-AUDIO(R)2727 GND2828 DVD-SPDIF2929 GND

FIGU

RE

2 - WIR

ING

INTE

RC

ON

NE

CT

DIA

GR

AM

Page 8

Video Signal flow (Figure 3 & 4)

Figure 3

The composite and S-video inputs are located on the side jack panel. These signals are fedto the the power supply on hard wired connecter CL701A. The one component input is locat-ed on the power supply panel. All of these signals are fed to the Digital Main board via con-nector CN302 on the power supply board.

Tuner TU301 tunes both analog and digital channels. The IF signal, DIF-OUT1 and DIF-OUT2 is fed to the Digital Main board via connector CN302 on the power supply.

Figure 4

All of the system control, audio processing and video processing is performed by IC3301.The component and AV inputs are fed to an internal switch and A/D converter. Tuner IF is fedto an internal Demodulator and Digital processor.

The three HDMI inputs are fed to an internal HDMI switch and receiver.

Whatever signal is fed to IC3301, the IC rescales the video to fit the resolution of the screenwhich in this case is 720p.

The signal is output from IC3301 in an LVDS format and then fed to IC3901.

IC3901 develops the drive signals for the LCD panel and is output using a RSDS format.

RSDS (Reduced Swing Differential Signaling) is a new format designed to drive LCD panels.This format is designed to provide a higher data rate to newer thinner LCD panels. As withLVDS, this format produces an offsetting positive and negative signal of approximately 200mvto reduce RFI.

If the picture is distorted or has lines, check the RSDS signal from the Digital Main board tothe panel to determine where the problem is located.

This is the CPV signal which can bechecked on CN3902, pin 4.

Page 9


COMPONENT-Y-IN

COMPONENT-Pb-IN

COMPONENT-Pr-IN

JK731

JK732

JK733

VIDEO-IN4 4S-VIDEO-C-IN6 6S-VIDEO-Y-IN8 8S-VIDEO-SW5 5COM-VIDEO-Y-IN15 15COM-VIDEO-Pb-IN17 17COM-VIDEO-Pr-IN19 19

JACK CBA

CL701A CL701BVIDEO-IN 5S-VIDEO-C-IN 3S-VIDEO-Y-IN 1

531JK751

S-VIDEO-IN

C Y

JK752VIDEO-IN

S-VIDEO-SW-IN 22

POWER SUPPLY CBA

TU301

DIF-OUT1 11DIF-OUT2 10

(TUNER UNIT)

IF-AGC 9

CN302 CN3702DIF-OUT126 26

IF-AGC24 24DIF-OUT228 28

DIF-OUT1DIF-OUT2

IF-AGC

CN302 CN3702VIDEO-IN

S-VIDEO-C-INS-VIDEO-Y-INS-VIDEO-SW

COM-VIDEO-Y-IN

COM-VIDEO-Pr-IN

COM-VIDEO-Pb-IN

TO DIGITALSIGNAL PROCESSBLOCK DIAGRAM

WF1WF2 WF3

WF4 WF5 WF6

VIDEO SIGNAL AUDIO SIGNAL

FIGU

RE

3 - VID

EO

SIG

NA

LFLO

W O

NE

Page 10

DIG

ITA

L M

AIN

CBA

UN

ITIC

3301

(DIG

ITA

L S

IGN

AL

PR

OC

ES

S)

IC39

01 (T

ININ

G C

ON

TRO

LLE

R)

LCD

MO

DU

LEA

SS

EM

BLY

CN

3902

LLV

1P21

LLV

1N20

LLV

0P23

LLV

0N22

LLV

2P19

LLV

2N18

LLV

3P13

LLV

3N12

LLV

4P11

LLV

4N10

LLV

5P9

LLV

5N8

LLV

CLK

P16

LLV

CLK

N15

TP6

PO

L5

CP

V4

OE

3S

TV1

27 26 29 28 31 30 42 41 45 44 47 46 33 32 88 19 92 93 94

123

122

125

124

127

126

131

130

129

128

LCD

TIM

ING

CO

NTR

OLL

ER

LVD

SR

X

RS

DS

I/F

FRC

CO

LOR

PR

OO

F

ADV

AN

CE

OV

ER

DR

IVE

FAIL

SA

FE M

OD

E

AD

23

AD

24

AE

23

AF2

3

AF2

2

AE

22

AD

21

AD

22

AF2

4

AE

24

LVD

STX

DIG

ITA

LS

IGN

AL

PR

OC

ES

S

A/D

CO

NV

ER

TER

S-V

IDE

O-Y

-INS

W

V1

U2

U1

S-V

IDE

O-C

-IN

U3

VID

EO

-IN

V3

CO

M-V

IDE

O-P

r-IN

CO

M-V

IDE

O-P

b-IN

CO

M-V

IDE

O-Y

-IN

AA

3

IF-A

GC

HD

MI-I

N1

HD

MI-I

N2

JK37

01

TMD

S-D

0(+)

TMD

S-D

0(-)

TMD

S-D

1(+)

TMD

S-D

1(-)

TMD

S-D

2(+)

TMD

S-D

2(-)

SD

AS

CL

7 9 4 6 1 3 10 12 16 15 7 9 4 6 1 3 10 12 16 15

JK37

02

TMD

S-D

0(+)

TMD

S-D

0(-)

TMD

S-D

1(+)

TMD

S-D

1(-)

TMD

S-D

2(+)

TMD

S-D

2(-)

TMD

S-C

LOC

K(+

)TM

DS

-CLO

CK

(-)

SD

AS

CL

A9

B9

C8

C9

B8

A8

B10

A10

A11

B11 A5

B5

C4

C5

B4

A4

B6

A6

A7

B7

TMD

S-C

LOC

K(+

)TM

DS

-CLO

CK

(-)

DE

MO

DU

LATO

R/M

PE

G D

EC

OD

ER

AE

2

AF7

AUD

IO I/

F

TO A

UD

IOB

LOC

K D

IAG

RA

MAC

LK

AD

ATA

1

BC

LKLR

CLK

AD

ATA

0S

PD

IF

AD

14

AD

9

AD

12

AD

10

AD

11

AC10

DAT

A(0

-15)

AD

DE

SS

(0-1

2)

IC32

01

A13

-15,

A18

,A

21-2

3,B

13-1

5,B

17,B

19-2

3

C15

,C17

-19,

C23

,C24

,D14

,D

15,D

17-1

9,D

22,D

23

B1,

B9,

C2,

C8,

D1,

D3,

D7,

D9,

F1,F

9,G

2,G

8,H

1,H

3,H

7,H

9

M2,

M3,

M7,

M8,

N2,

N3,

N7,

N8,

P2,

P3,

P7,

P8,

R2

(DD

R2

SD

RA

M)

HD

MI

I/F

HD

MI-I

N3

7 9 4 6 1 3 10 12 16 15

JK37

03

TMD

S-D

0(+)

TMD

S-D

0(-)

TMD

S-D

1(+)

TMD

S-D

1(-)

TMD

S-D

2(+)

TMD

S-D

2(-)

TMD

S-C

LOC

K(+

)TM

DS

-CLO

CK

(-)

SD

AS

CL

B1

B2

C1

C2

D1

D2

A1

A2

A3

B3

AUD

IOD

EC

OD

ER

DIF

-OU

T1D

IF-O

UT2

IF-A

GC

TO V

IDE

OB

LOC

K D

IAG

RA

M

TO V

IDE

OB

LOC

K D

IAG

RA

M

VID

EO

DE

CO

DE

R

AF2

S-V

IDE

O-S

WC

6S

-VID

EO

-SW

M2

AUD

IO(R

)M

1AU

DIO

(L)

VID

EO

SIG

NA

LA

UD

IO S

IGN

AL

FIGURE 4 - VIDEO SIGNAL FLOW TWO Page 11

The waveform to the right is the POL signal onCN3902, pin 5.

The waveform to the right is the TP signal on CN3902,pin 6.

The waveform to the right is typical of the ones carryingthe picture information.

This signal is measured on pin 8 of CN3902. Similarsignals are present on pins 9, 10, 11, 12, 13, 15, 16, 18,19, 20, 21, 22 and 23.

Audio Signal Flow (Figure 5)

AV audio from the side jack panel is fed to the power supply via connector CL701A. The AVaudio inputs are all located on the power supply board. The audio input is selected by IC771which is controlled by the INPUT1 and INPUT0 lines from the microprocessor. Selectedaudio is fed to the Digital Main board via connector CN302 on the power supply board.Digital and analog tuner audio is processed by the signal processor on the digital main board.

Selected audio from the processor on the digital main board is fed to IC3803 and then to twoD/A converters, IC3802 and IC3801 and then to the power supply board via connector CN301on the power supply.

Audio is then fed to the audio amplifier, IC801, and then to the speakers.

Monitor analog audio is buffered by IC871 before being fed to the left and right audio outputs.

Page 12

IC771(AUDIO SELECTOR)

AUDIO(L)-OUT

AUDIO(R)-OUT

HDMI-AUDIO(L)-IN

HDMI-AUDIO(R)-IN

JK721

JK722

JK871

JK872

COMPONENT-AUDIO(L)-IN

COMPONENT-AUDIO(R)-IN

JK741

JK742

2415

15111214

JACK CBA

CL701ACL701BAUDIO(L)-IN 77AUDIO(R)-IN 99AUDIO(L)

-IN

AUDIO(R)-IN

JK753

JK754

CN3702CN302AUDIO(L)13 13AUDIO(R)11 11

CN3702CN302INPUT110 10INPUT012 12

CN3701CN301AUDIO(L)-OUT2 2AUDIO(R)-OUT4 4AMP(L)-OUT6 6AMP(R)-OUT8 8

TINU ABC NIAM LATIGIDABC YLPPUS REWOP

20

IC801 (AUDIO AMP)

1

44

9,1013,14

35,36

31,32

MUTE CONTROL

CN801CL801SP801SPEAKERL-CH

CN802

SP(R)- 1

CL802SP802SPEAKERR-CH

PWM1

PWM2

DRIVE1

CN302 CN3702

AUDIO-MUTE 2020

JK841DIGITALAUDIO-OUT(COAXIAL)

Q841

Q771

Q772

BUFFER

Q871

Q873,Q874MUTE Q872

MUTE

SPDIF 22

SP(R)+ 2

SP(L)- 1SP(L)+ 2

Q801

CONTROL LOGIC

3

109

13

IC871 (OP AMP)

1 3

7 5

DRIVE2

DRIVE

IC3802(D/A CONVERTER)

D/ACONVERTER

1514

8765

(L-CH)(R-CH)

IC3801(D/A CONVERTER)

D/ACONVERTER

1514

8765

(L-CH)(R-CH)

AUDIO(L)AUDIO(R)

TO DIGITALSIGNALPROCESSBLOCKDIAGRAM

TO DIGITALSIGNALPROCESSBLOCKDIAGRAM

INPUT1

LRCLKBCLK

ADATA1ACLK

SPDIF

ADATA0

INPUT0AUDIO-MUTE

TO SYSTEMCONTROLBLOCKDIAGRAM

AUDIO SIGNAL

WF7

3334373635

4339402

(AUDIO DSP)IC3803

DSP

FIGU

RE

5 - AU

DIO

BLO

CK

Page 13

HOT COLDPOWER SUPPLY CBA

HOT CIRCUIT. BE CAREFUL.

Q602SWITCHINGCONTROL

14

3 2

IC601

T601

TO INVERTERBLOCK DIAGRAM (CN1900)

CN602

3

HOT-GND1ACL2

LINEFILTER

L601AC601AC CORD

BRIDGERECTIFIER

D601- D604

5

4

11

14

12

17

18

13

16

15

199

7

8

FEEDBACK

Q601SWITCHING

Q631

CN201 CN1001

CN301 CN3701

Q207,Q208SWITCHING

Q211SW-6.8V

SW

Q401

Q209,D204SW+16V

Q635IC631

+3.3VREG. 23

Q634

Q638,Q639

Q641,643SW+5V

Q640SW+5V

Q642SW+9V

Q501SW+16V

Q637,D666SW+3.3V

LINEFILTER

L602

4A/125V

F601 4A/125V

P-ON-H1TO SYSTEM CONTROL BLOCKDIAGRAM

P-ON-H2

+5V REG.

PROTECT2PROTECT1

SWITCHING

AL+33VP-ON+5V

AL+3.3V

AL+13VTUNER+5V

P-ON+9V

19,20

12

28,9

21,22

13,14

LCD+16VLCD+6.8V

INV+16VVGHP-ON+3.3V

P-ON+3VP-ON+7VAL+3.3VP-ON+3.3VP-ON+5V

INVERTER CBA


13LCD-6.8V13

P-ON+3.3V19,20

P-ON+3.3V1210VGH10

INV+16V2LCD+16V8,9

AL+3.3V21,221610

P-ON+7V16P-ON+3V10

P-ON+5V13,14

Q210 Q201,Q212SW+24.5V

CAUTION !Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.If Main Fuse (F601) is blown , check to see that all components in the power supplycircuit are not defective before you connect the AC plug to the AC power supply.Otherwise it may cause some components in the power supply circuit to fail.

For continued protection against risk of fire, replace only with same type 4 A, 125V fuse.

CAUTION ! :

ATTENTION : Utiliser un fusible de rechange de mŒme type de 4A, 125V.4A/125V

NOTE:The voltage for parts in hot circuit is measured usinghot GND as a common terminal.

FIGU

RE

6 - PO

WE

R S

UP

PLY

Page 14

Power Supply (Figure 6)

AC is fed the line filters and bridge rectifier. RAW DC is fed to the Inverter via connectorCN602 on the power supply board and to transformer T601.

The switch mode supply consist of transistors Q601 and Q602. In standby, the power supplyis running in a low power pulsating mode controlled by Q634 on the secondary side.

When the set is turned On, the P-ON-H1 and P-ON-H2 lines goes High. P-ON-H2 changesturns on transistor Q634 to change the bias of the feed back circuit switching the power sup-ply to a full power mode. It also turns on transistors Q638, Q639 and Q637 to turn the P-ON-3.3V supply On. The P-ON-H1 line switches Q207 and Q208. This switches Q210, Q201and Q212 to switch the VGH voltages. Q211 is turned On switching the LCD-6.8V supply. Italso switches Q209 switching the LCD+16V supply. Q501 is switched to turn on the INV+16Vsupply. Q642 is switched to produce the P-ON+9V supply.

Protect 1 (Figure 7)

Protect 1 is connected to all of the supplies via diodes. If any one of the supplies shorts, theprotect line will go Low causing the set to turn Off. The pull up voltage for Protect 1 is R401.

Page 15

P-ON+3V

P-ON+5V

AL+33V

P-ON+9V

TUNER+5V

D409

D414

D404

D416

D405

R40810K

AL+13V

P-ON+3.3V

LCD+16V

INV+16V

LCD+24.5V R41210K

D40615V

D411

D413

D412

D410

D415

AL+3.3V

R40122K

D4173.9V

PROTECT1

FIGURE 7 - PROTECT 1

Protect 2 (Figure 8)

Protect 2 monitors the circuit feeding the 3.3V standby supply.

In the standby mode, the +33V supply will measure approximately 8 volts. When the set isturned On, it will go to +33V as the power supply goes to a full power mode. Q635 regulatesthe voltage feeding IC631, AL3.3V regulator.

If Q635 fails, the voltage at the emitter of Q635 would exceed the voltage of the 10 volt zener,D407 causing it to conduct. This will cause the PROTECT 2 line to go High resulting in theTV set turning Off.

3.3VREG

D660D6362.7

R6362.7

D637

IC631

AL3.3V

D40710V

D4183.9V

PROTECT2

R66215

R660

R6631.8K

R6641.8K

D6596.8V

Q635

+33V

FIGURE 8 - PROTECT 2

Page 16

Inverter (Figure 9)

The inverter power supply is switched On by the BACKLIGHT-SW line from the digital board.The BACKLIGHT-ADJ line is fed to IC1000 to control the pulse width output of IC1000 andthe brightness of the backlight. The outputs to the backlights are fed to over voltage protec-tion circuits. If a problem is detected in one of the outputs, Q1600 is turned On causing theProtect 3 line to go Low. This will cause the set to turn Off.

System Control (Figure 10)

Control signals from the Function board and IR Sensor board are routed through the powersupply board to IC3301. IC3301 preforms all of the system control functions.

Note that the P-ON-HI voltage in pin 5 of CN101 is inverted from the pin with the same label,CN301, pin 9.

Inverter BoardPage 17

Inverter Block D

iagram

INVERTER CBA

CN1001 PROTECT36

BACKLIGHT-ADJ4VCOM14

BACKLIGHT-SW5TO SYSTEMCONTROLBLOCK DIAGRAM(CN201)

T1950

10

11

14

15

2

3

4

5

7

8

14

3 2

Q1970

Q1971

IC1930

14

3 2

IC1931

Q1931

TO POWERSUPPLY BLOCK DIAGRAM(CN602)

HOT

COLD

HOT CIRCUIT. BE CAREFUL.

Q1972

SWITCHINGQ1930

CN1900

Q1932

IC1000 (PWM CONTROL)

BACKLIGHT

12

12

12

CN1100

CN1150

CN1200

BACKLIGHT

BACKLIGHT

T1100

Q1551, Q1552, Q1553

Q1001

Q1003

Q1210

Q1211

Q1160

Q1161

Q1110

Q1111

Q1500

Q1801,Q1802, Q1803,Q1804Q1800,Q1815

Q1004,Q1005

Q1550

T1150

4

13

78

65

2

T1200

DRIVE

Q1501, Q1502, Q1503

DRIVE

OSC

PWMCONTROLLOGIC

VCC

DCT

CURRENTCONTROLSWITCH

CURRENTCONTROLSWITCH

OVER VOLTAGEPROTECTOR

Q1260



Q1261





OVER VOLTAGEPROTECTORQ1060

OVER VOLTAGEPROTECTOR Q1061


11

8

5 6

15

3

4

12

16

21

SW+16V

SW

SW+16V

Q1600

Q1621

LCD MODULEASSEMBLY

T1050

4

13

78

65

2

4

13

78

65

2

4

13

78

65

2

T1250

4

13

78

65

2

BACKLIGHT

12

CN1050

IC1700 (COMPARATOR)

IC1750(COMPARATOR)

67

5

23

910

1

8

1312

14

67

5

ACL2HOT-GND1

INV+16V

10CN1003

VCOM

12

CN1250BACKLIGHT

NOTE:The voltage for parts in hot circuit is measured usinghot GND as a common terminal.

6.6V

FIGU

RE

9 - INV

ER

TER

P

age 18

AC18

KEY SWITCH

IC3301(MAIN MICRO CONTROLLER)


IR SENSOR CBAFUNCTION CBA

POWER SUPPLY CBA

CL102C

REMOTESENSOR

RS101

AL+6.0V

POWERD101CL102A

CL103B

REMOTE2 2P-ON-H15 5

CN302CN3702

CN3702 CN302

CLKOUTCLKIN

X310125MHzOSC

N1N2

SCLSDA

45

TU301 (TUNER UNIT)

TO INVERTERBLOCK DIAGRAM(CN1001)

TO POWER SUPPLY BLOCK DIAGRAM

PROTECT3 AE5VCOM-PWM AC14

PROTECT2 AD4PROTECT1 AD5

KEY-IN1 AC5

BACKLIGHT-SW AB16

E1E2

P-ON-H2 AB13

REMOTE R22

P-ON-H1

PROTECT2PROTECT1

P-ON-H2P-ON-H1

R23

JUNCTION CBA

CN101

KEY-IN16 6

CL103AKEY-IN13 3

CN201

CN101

CN301

Q172

CN3701

AB23BACKLIGHT-ADJ

IC3101 (MEMORY)

SCKSI

SO

AB25

AB24

AC25

AC24

6521

E113

AC19

SCLSDA

CN301CN3701

CSWP

SCKSINSOUTCSWP

IC201,Q203,Q204,Q205

DRIVE

22 22SCL21 21SDA

11 11PROTECT115 15PROTECT25 5PROTECT329 29VCOM-PWM26 26BACKLIGHT-SW

28 28BACKLIGHT-ADJ

KEY-IN129 29

P-ON-H19 9

REMOTE25 25P-ON-H21 1

REMOTE2 2P-ON-H15 5KEY-IN16 6

6 PROTECT35 BACKLIGHT-SW

4 BACKLIGHT-ADJ

14 VCOM

TO AUDIOBLOCK DIAGRAM AUDIO-MUTE

INPUT0INPUT1

AUDIO-MUTE

INPUT0INPUT1

AB9

88 DVD-LED 88 DVD-LED

FIGU

RE

10 - SY

STE

M C

ON

TRO

LP

age 19

Service Mode

In the service mode, it is possible to generate screen test patterns, Initialize the set or makegrey scale alignments.

To enter the service mode, it is necessary to press a hidden button on the remote control.

As shown to the right, it is necessary tohave a Magnavox remote for entering theservice mode for the Magnavox and Philipsmodels.

Service mode for the Sylvania LC320SLXand Emerson LC320EMX.

Remote for the LC320SSX. With theLC320SSX remote, the remote cover canbe peeled back rather than cutting a holein the remote.

Page 20

The Service screen is shown to the right.

Refer to Figure 11 for the service menumap.

To Initialize the set which puts it in anout of box condition, press the Infobutton on the remote while in the servicescreen.

The word Initialized will turn green indi-cating that the initialization is complete.

After initializing the set, the customer willbe prompted to enter a language andprogram the TV when it is turned On forthe first time.

Grey Scale alignment

To perform the grey scale alignment, press the Vol- button three times until C/D appears onthe screen. Then select the desired Cutoff and Drive adjustments. Use the channel up/downbutton on the remote to adjust the respective cutoffs or drives. Default values are listedbelow.

Select Adjustment Value1 COR - Cutoff Red 1872 COG - Cutoff Green 03 COB - Cutoff Blue 564 DR - Red Drive -465 DG - Green Drive 06 DB - Blue Drive -21

VCOM 1 and 2 are used to calibrate the A/D converter for the Component inputs.2 VCOM1 903 VCOM2 90

Refer to the service manual for more details.

Page 21

SERVICE BUTTON

SOFTWARE UPDATE

CD COR - CUTOFF RED1

VOL-

VOL-

VOL-

INITILIZEDINFO

7

7

7

7

WHITE SCREEN

BLACK SCREEN

RED SCREEN

GREEN SCREEN

VCOM1

VCOM2

(H) CABLE CH

(H) ANTENNA CH

2, 3, 5, 6MAIN MENU

2

3

5

6

7

BLUE SCREEN

WHITE 20%

COG - CUTOFF GREEN

COB - CUTOFF BLUE

DR - DRIVE RED

CO - DR LIST

CO LIST ADJ ALL

DB - DRIVE BLUE

DG - DRIVE GREEN

TI

2

3

4

5

6

7

8

9

CHANNEL 2

DEBUGGINGMESSAGE

LEFTCURSOR SCREEN

TESTMODE

CURSOR UP, THENCURSOR DOWN TO EXIT

PREV CH TO RETURN TO MAIN MENU

7

7

BLACK SCRN

SHADE GRY

SHADE WH

SHADE RED

GREEN

BLUE

WHITE

RED

CH DOWN

CH DOWN

CH DOWN

CH DOWN

CH DOWN

CH DOWN

CH UP

CH UP

CH UP

CH UP

CH UP

CH UP

CH DOWN

CH UP CH DOWN

CURSOR LF

CURSOR RG

MENU

FIGURE 11 - SERVICE MENU

Page 22

Other Test Modes

Pressing the left cursor button on the remote while in the service mode will switch on ascreen test mode. Press the cursor up followed by the cursor down button on the remote toexit. Pressing the Menu button will switch on a second screen test mode. Pressing the chup/down button will cycle the screen through different patterns. Press the cursor left followedby the cursor right button to exit this mode.

Dead set

Does the power LED turnOn when the power button

is pressed?

Is the AL+3.3V supply present?Measure on pin 21 of CN301 on the

power supply.

No

Repair or replacethe power supply.

Connect the setto AC power

No

Does KEY-IN1 go Lowwhen the power button is

pressed?

Does KEY-IN1, pin 6 of CN101 read 3.3 volts with no keyboard

buttons being pressed?

Yes

Is 3.3 volts present onpin 29 of CN302?

No

Repair or replace thepower supply board.Yes

Replace the DigitalMain board.

No

Yes

Replace the Digital Mainboard.

Yes

Does the set turn on when KEY-IN1 is

grounded?

No

No

Repair the Keyboard and checkthe IR sensor and remote.

Yes

Yes

Does the PowerLED stay On?

If the power LEDstays On, the

panel backlight isOn.

Yes Is OSD (On Screen Display,Menu) present when the Menu

button is pressed?

NoVideo

YesDigital Main board.

No

Does the Power LEDand screen backlight flash

On and then Off?

No

Does the Power LEDflash On and then OffNo

Power LEDFlashes

Yes

BacklightFlashes

Yes

No

Page 23TROUBLESHOOTING FLOW CHART

Power LEDFlashes

Disconnect theDigital Main boardfrom the Power

Supply.

Jumper to the AL3.3Vsupply to the P-ON-H1and P-ON-H2 to forcethe power supply On.

Is Protect2 (Pin 15 ofCN301) Low?

Repair or replacethe power supply.High

Is Protect1 (Pin 11 ofCN301) High (2.4V)?

Low

One or more of the B+ supplies aremissing. Repair or replace the power

supply.Low

High

Is approximately 160V DCpresent between pins 1 and 2 of

CN602 on the power supply?

Reconnect the DigitalBoard and monitor thePROTECT3 voltage onpin 6 of CN201 as the

set is turned On.

Yes

Repair or replace thepower supply board.

No Does the PROTECT3 line go to 3.3 volts when

the set is turned On?

Does the BACKLIGHT-SW on pin5 of CN201 go to 3.3 Volts when

the set is turned On?

No


Yes

Replace the Inverterboard.

Yes


No

Page 24 TROUBLESHOOTING FLOW CHART

NoVideo

Is video present after connecting asignal to one of the AV inputs and

selecting that input?

Does video appear after reseatingthe ribbon cables connecting the

power supply to the digital board?No

Replace thepower supply

board.

Yes

Is tuner video presentafter auto-programming?

Replace the digitalmain board.

No

Yes

No

Check remaininginputs.

Yes

Does video return afterconnecting an antenna and

auto-programming.

No

Check remaininginputs.

Yes


BacklightFlashes

Turn the set On while monitoring theHV output from the Inverter board at

each output one at a time.Repeat for each of the five locations.It is only necessary to place the scopeprobe in the proximity of the output as

shown at the right.If you connect directly, use a X100

probe.

The waveform willappear as shownto the right if the

output is working.

Is outputpresent at

each location?

The panel is most likely defective.Check panel connections to make sure

they are sucure.

Yes

Replace theInverter board.

No

Page 26 TROUBLESHOOTING FLOW CHART

NoAudio

Is audio presenton pins 6 and 8 of

CN301?

Turn the volumeup.

Change the Digital Mainboard.

No

Is the audio mute on pin 20 of CN302zero volts. (<0.4V)

Yes

Change the DigitalMain board.

No

Change the powersupply board.

Yes


Abbreviation list

Description

1080i 1080 visible lines, interlaced1080p 1080 visible lines, progressive scan480i 480 visible lines, interlaced480p 480 visible lines, progressive scanADC A/D Analogue to Digital ConverterAFC Automatic Frequency Control: control signal used to tune to the correct

frequencyAGC Automatic Gain Control: algorithm that controls the video input of the

feature boxAM Amplitude ModulationAV Audio VideoC-FRONT Chrominance front inputCBA Circuit Board Assembly (or PWB)ComPair Computer aided rePairCSM Customer Service ModeCVBS Composite Video Blanking and SynchronizationCVBS-EXT CVBS signal from external source (VCR, VCD, etc.)CVBS-INT CVBS signal from TunerCVBS-MON CVBS monitor signalCVBS-TER-OUT CVBS terrestrial outDAC Digital to Analogue ConverterDFU Directions For Use: owner's manualDNR Dynamic Noise ReductionDRAM Dynamic RAMDSP Digital Signal ProcessingDTS Digital Theatre SoundDVD Digital Video DiscEEPROM Electrically Erasable and Programmable Read Only MemoryEPLD Electronic Programmable DeviceEXT EXTernal (source), entering the set by cinches (jacks)FBL Fast Blanking: DC signal accompanying RGB signalsFLASH FLASH memoryFM Field Memory / Frequency ModulationFMR FM RadioFRC Frame Rate ConverterFRONT-C Front input chrominance (SVHS)FRONT-DETECT Front input detectionFRONT-Y_CVBS Front input luminance or CVBS (SVHS)H H_sync to the module HD High DefinitionHDMI High Definition Multimedia Interface HP HeadPhone

Page 28

I2C Integrated IC busI2S Integrated IC Sound busIC Integrated CircuitIF Intermediate FrequencyInterlaced Scan mode where two fields are used to form one frame. Each field contains

half the number of the total amount of lines. The fields are written in 'pairs', causing line flicker.

IR Infra RedIRQ Interrupt ReQuestLast Status The settings last chosen by the customer and read and stored in RAM or in the

NVM. They are called at start-up of the set to configure it according the customers wishes.

LCD Liquid Crystal DisplayLED Light Emitting DiodeLINE-DRIVE Line drive signalLVDS Low Voltage Differential Signalling, data transmission system for high speed

and low EMI communication.MPEG Motion Pictures Experts GroupNVM Non Volatile Memory: IC containing TV related data (for example, options)OSD On Screen DisplayProgressive Scan Scan mode where all scan lines are displayed in one frame at the same

time, creating a double vertical resolution.RAM Random Access MemoryRC Remote Control transmitterRC5 Remote Control system 5, the signal from the remote control receiver RGB Red, Green, and Blue. The primary colour signals for TV. By mixing

levels of R, G, and B, all colors (Y/C) are reproduced.RGBHV Red, Green, Blue, Horizontal sync, and Vertical syncROM Read Only MemorySAM Service Alignment ModeSIF Sound Intermediate FrequencySC SandCastle: two-level pulse derived from sync signalsSCL CLock Signal on I2C busSDA DAta Signal on I2C busSDRAM Synchronous DRAMSIF Sound Intermediate FrequencySTBY STandBYVGA Video Graphics ArrayXTAL Quartz crystalYPbPr Component video (Y= Luminance, Pb/Pr= Colour difference signals)Y/C Luminance (Y) and Chrominance (C) signalY-OUT Luminance-signal

Page 29

Service Tips

Symptom: Lines in the pictureas shown in the picture to the right.

Cause: Defective Digital Mainboard.

Symptom: High frequency noise from the TV when Off.

Cause: Audio amplifier not being shut off during standby.

Cure: Upgrade software.

Symptom: No audio on some analog channels.

Cause: Low sensitivity to 4.5mHz carrier.

Cure: Upgrade software.

Page 30

MM081909

c: 9 l91 m l91tm.qxd (page 1) - a · pdf filetechnical training fl9.1 lcd tv chassis for 2009...

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