tech bulletin 4[1]

7/24/2019 Tech Bulletin 4[1]

1/47

LG Electronics. Inc.2008

LED LCD TV Repair Guide

New models 2009

Applicable to model numbers xxLH9000


2/47


LGE3369A

IC100

RGB

COMPONENT

F SCART

AV

BUF_TS_CLK/ERR/SYN/DATA[0]

AV_CVBS_IN

COMP_Y/Pb/Pr

SC1_CVBS_IN

SC2_CVBS_IN

DSUB_ R/G/B

74LVC541

A

Buffer

IC502

CISlot

FE_VMAIN

FE_TS_DATA[0:7] CI_MDI[0:7]

H SCART

SC1_R/G/B

FE_VOUT

DTV/MNT_VOUT

MAX3232CDRIC403

SPDIF

SPDIF_OUT

DSUB_H/VSYNC

CI_TS_DATA[0:7]

CI_Data[0:7] PCM_D[0:7]

PCM_A[8:14]

AUDIO IN(PC)

DGB_TX/RX

DDR2 SDRAM(1Gb)IC300

NAND FlashIC102

(64MB)

USB

PCM_A[0:7]

SDDR_D[0:15]

TDDR_D[0:15]

SDDR_A[0:12]

MP6211DH

IC402

USB Power

TDDR_A[0:12]

USB1_DM/DP

Serial FlashFor BootIC103

HDMI

1/2/3

Rear :

3

LGE7329AIC900

PanelLED

200Hz

TMDS351PAGRIC604

TMDS[0:7]HDMI_CEC

HPD

5V_HDMI

I2C

1. LH9000-ZA Block Diagram

TDFW-G235DTU1200

74LCX244

Buffer

IC501

PCM_A[0:7]

CI_ADDR[0:7]

LVDS

EEPROMIC105

I2C

SPI_CK/CS/D0/D1

Side AV

USB0_DM/DP

HDMI

4 Side

AUDIO Out (HeadPhone)

RS-232C

DDR2 SDRAM(512Mb)IC301

Digital amp(NTP3100L)

IC701

I2S L/R

TMDS[0:7]HPD,5V_HDMI

AudioSwitchIC702

AUDIO Out (B/THeadset)

LG5110IC3502

LVDS

Local Key

LED Assy

IR & RGB Sensor

DDR2 SDRAM(512Mb)

IC1000/IC1001

EEPROMIC3504

Serial FlashIC902


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Contents of LED LCD TV Standard Repair Process

No. Error symptom (High category) Error symptom (Mid category) Page Remarks

1 No video/Normal audio 1

2 No video/No audio 2

3 Video error, Picture broken/ Freezing 3

4 Color error 4

5

A. Video error

Vertical/Horizontal bar, residual image,

light spot, external device color error5

6 No power 6

7B. Power error Off when on, off while viewing, power auto

on/off7

8 No audio/Normal video 8

9C. Audio error

Wrecked audio/ discontinuation/ noise 9

10 No response in remote controller, key error 10

11D. Function error

External device recognition error 11

12 E. Noise Circuit noise, mechanical noise 12

13 F. Exterior error Exterior defect 13

First of all, Check whether there is SVC Bulletin in GCSC System for these model.


4/47 LG Electronics. Inc.2009

Normal

audio

Y

NMove to No

video/No audio

No video

Normal audioCheck Back Light

On with naked eyeOn

Y

N

Check Power

Board

12v,5v etc.

Normal

voltage

Y

N

Replace Main Board

Repair Power

Board or partsCheck Power Board 20V /12V or 24v output

Normal

voltage

YReplace LED

Drive B/D or

module

N

Repair Power

Board or parts

End

Always check & record S/W Version and White

Balance value before replacing the Main BoardReplace Main Board Re-enter White Balance value

Precaution

Established

dateElectronics 6-3

Standard Repair Process

Revised date

2009. 7 .29

1/13

Error

symptom

A. Video error

No video/ Audio OK

A3A1

A2

A4 & A7

1

First of all, Check whether all of cables between board is inserted properly or not.(Main B/D Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)

2009. 9 .01LED LCD TV



Normalvoltage?

Check various

voltages of PowerBoard ( 5V,12V,20V

or 24V)

No Video/No audio

Check and

replaceMAIN B/D

Y

Replace Power

Board and repair

parts

N End


A. Video error

No video/ No audio

A5

Established

dateElectronics 6-3

Revised date 2/13

Error

symptom

2

2009 . 7. 29

2009. 9 .01LED LCD TV



A. Video error

Picture broken/ Freezing

Y

N

A6

N

Check RF Signal level

Normal

Signal?

Check RF CableConnection

1. Reconnection

2. Install Booster

Check

S/W Version

Booster menuOn

Off: Check

OffOn: Check

S/W Upgrade

Check whether other equipments have problem or not.

(By connecting RF Cable at other equipment)

DVD Player ,Set-Top-Box, Different maker TV etc`

SVC

Bulletin?

Replace

Main B/D

Check

Tuner soldering

Normal

Picture?

Y

N

Y

Close

Normal

Picture?

YClose

MenuSetup Booster

. By using Digital signal level meter

. By using Diagnostics menu on OSD

( MenuSetupDiagnostic)

- Signal strength (Normal : over 50%)

- Signal Quality (Normal: over 50%)

Normal

Picture?

Y

Contact with signal distributor

or broadcaster (Cable or Air)

NN

Normal

Picture?

Y

Close

N

A7


Established

dateElectronics 6-3

Revised date 3/13

Error

symptom

3

2009 . 7. 29

2009. 9 .01LED LCD TV



Color

error?

Y

N

Check

and replace

Link Cable

(LVDS) andcontact

condition

Y

N

Replace Main B/DColor

error?

Check error

color input

mode

Check color by input

-External Input

-COMPONENT

-RGB-HDMI/DVI

YExternal device

/Cable

normal

External Input/

Component

error

Checkexternal

device and

cable

YExternal device

/Cable

normal

RGB/

HDMI/DVI

error

Check external

device and

cable

Replace Main B/D

Replace Main B/D

N

N

A. Video error

Color error

A8

N

Y

End

Replace module

Request repair

for external

device/cable

Replace

T-Con

Board

N

Y

Color

error?

LGD ModuleOnly

Other Module

Color

error?

Check Test pattern

A11

A10A27


Established

dateElectronics 6-3

Revised date 4/13

Error

symptom

2009 . 7. 29

2009. 9 .01LED LCD TV

4



Screen

normal?

N

YCheck external

device

connection

condition

Y

N

Check and

replace Link

Cable

Normal?

Y

NScreen

normal?Replace Main B/D

Replace

module

Check color condition by input

-External Input

-Component

-RGB

-HDMI/DVI

End

Vertical/Horizontal bar, residual image, light spot

Request repair

for external

device

A. Video error

Vertical / Horizontal bar, residual image,light spot, external device color error

A14

External device screen error-Color error

External

Input

error

Connect other external

device and cable(Check normal operation of

External Input, Component,RGB and HDMI/DVI by

connecting Jig, pattern

Generator ,Set-top Box etc.

N

Y

Replace

Main B/D

Screen

normal?

Check screen

condition by

input

-External Input

-Component

-RGB

-HDMI/DVI

Request repair for

external device

Component

error

RGB

error

HDMI/

DVI

Connect other external

device and cable

(Check normal operation ofExternal Input, Component,

RGB and HDMI/DVI by

connecting Jig, pattern

Generator ,Set-top Box etc.

Replace

Main B/DScreen

normal?

N

Y

Check S/W Version

Y

NCheck

version

S/W Upgrade

Y

NNormal

screen?

End

Y

N

Replace T-Con Board

LGD Module Only

Replace

Module

Other Module

Replace module

in abnormal displaying

after exchanging T-Con B'd

End

Established

dateElectronics 6-3

Revised date 5/13

Error

symptom


A12A13

Check Test pattern

A27

5

Screen

normal?

2009 . 7. 29

2009. 9 .01LED LCD TV

St d d R i P



B. Power error

No power

Power LED

On?

Y

N

DC Power on

by pressing Power Key

On Remote control

Y

NNormal

operation?Check Power

On High

Check Power cord

was inserted properly

Check

Power LED

Replace

Power

B/D

Measure voltage of each output of Power B/D

N

YNormalvoltage?

Replace Main B/D

N

YOK?

Replace Main B/D

N

Y

Normal? Check ST-BY 5V

Replace Power B/D

N

YNormal

voltage?

Replace Power

B/D

Y

A15

A16

A17

A18


Established

dateElectronics 6-3

Revised date 6/13

Error

symptom

09 years new model apply mechanical power switch

to reduce power consumption in stand-by status.

If mechanical power switch off Doesnt turn on by remote control

Doesnt appear LED light

Please refer to the A21 Page

6

. Stand-By: Red

. Operating: Green

Check & Repair

Mechanical Power switch

on Local control of TV

A19

Close

2009 . 7. 29

2009. 9 .01LED LCD TV




B. Power error

Off when on, off while viewing, power auto on/off

Error?N

Y

Check Power Off

Mode

Fix A/C code & Outlet

and describe 3 wave

length

Check A/C code

Check for 3 wave length

Check outlet

Replace Main B/DCPU

Abnormal

(If Power Off mode

is not displayed)

Check Power B/D

voltage

Y

N

Replace Main B/DNormal

voltage?

Replace Power B/D

Replace Power B/D

N

YNormal? End

Caution

Check and fix exterior

of Power B/D Part

A20

A21

Established

dateElectronics 6-3

Revised date 7/13

Error

symptom


7

Status Power off List Explanation

"POWEROFF_REMOTEKEY" Power off by REMOTE CONTROL

"POWEROFF_OFFTIMER" Power off by OFF TIMER

"POWEROFF_SLEEPTIMER" Power off by SLEEP TIMER

"POWEROFF_INSTOP" Power off by INSTOP KEY

"POWEROFF_AUTOOFF" Power off by AUTO OFF

"POWEROFF_ONTIMER" Power off by ON TIMER

"POWEROFF_RS232C" Power off by RS232C

"POWEROFF_RESREC" Power off by Reservated Record

"POWEROFF_RECEND" Power off by End of Recording

"POWEROFF_SWDOWN" Power off by S/W Download

Normal

"POWEROFF_UNKNOWN" Power off by unknown status except listed case

"POWEROFF_ABNORMAL1" Power off by abnormal status except CPU troubleAbnormal

"POWEROFF_CPUABNORMAL" Power off by CPU Abnormal

* Please refer to the all cases which

can be displayed on power off mode.

Abnormal1

2009 . 7. 29

2009. 9 .01LED LCD TV



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No audio

Screen normal

Check user

menu >

Speaker off

OffN

Y

Cancel OFF and describe

Check audio B+

20V or 24V of

Power Board

Normal

voltage

Y

N

Replace Power Board and repair parts

Check

Speaker

disconnection

N

Y

Replace Speaker

Replace MAIN Board End

C. Audio error

No audio/ Normal video

A22 A23

Disconnection

Established

dateElectronics 6-3

Revised date 8/13

Error

symptom


8

2009 . 7. 29

2009. 9 .01LED LCD TV



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Wrecked audio/discontinuation/noise is same after Check input signal compared to No audio

C. Audio error

Wrecked audio/ discontinuation/noise

Wrecked audio/

Discontinuation/

Noise for

all audio

Check and replace

speaker and

connector

Wrecked audio/

Discontinuation/

Noise only

for D-TV

Wrecked audio/

Discontinuation/

Noise only

for Analog

Wrecked audio/

Discontinuation/

Noise only

for External Input

Connect and check

other external

device

N

Y

Normal

audio?

Check and fix external device

Replace Power B/D

N

Y

Normalvoltage?

Check input

signal

-RF

-External Inputsignal

Signal

normal?

(When RF signal is not

received)

Request repair to external

cable/ANT provider

Y

Check audio

B+ Voltage (20V or 24V)

Replace Main B/D

(In case of

External Input

signal error)

Check and fixexternal device

Replace Main B/DN

End

Established

dateElectronics 6-3

Revised date 9/13

Error

symptom


A24

9

2009 . 7. 29

2009. 9 .01LED LCD TV



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D. General Function Problem

Remote control & Local switch checking

Y

N

1. Remote control(R/C) operating error

MovePower problemSection

2. Local(Mechanical) switch operating error

Check R/C itself

OperationNormal

operating?

Normaloperating?

Y

Close

Replace R/C

If R/C operate,

Explain the customer

cause is interference

from light in room.

Check R/C OperatingWhen turn off light

in room

Check & ReplaceBaterry of R/C

Check & Repair

Cable connection

Connector solder

Normaloperating?

Check B+ 5V

On Main B/D

A25

NormalVoltage?

Close

N

N

Check 5v on Power B/D

Replace Power B/D or

Replace Main B/D

(Power B/D dont have problem)

A21

Check IR

Output signalNormalSignal?

N

Y

Repair/ReplaceIR B/D

N

A25

Replace

Main B/D

Y

Y

N

Check R/C

OperationNormal

operating?

Y

Check & Repair

Cable connection

Connector solder

Normaloperating?

Close

N Check & Replace

Assembly status

(Key PCB + tool )

A25

Check Key

Output signal

Y

Normaloperating?

Close

N NormalSignal?

Repair/Replace

Local switch B/D

N

Replace

Main B/D

Y

p

Established

dateElectronics 6-3

Revised date 10/13

Error

symptom

10

2009 . 7. 29

2009. 9 .01LED LCD TV


14/47



15/47


Check

location of

noise

Identify

nose

type

Circuit

noise

Replace LED drive B/D

Replace LIPS B/D

Mechanical

noiseCheck location

of noise

OR

When the nose is severe, replace the module

(For models with fix information, upgrade theS/W or provide the description)OR

If there is a Tak Tak noise from the

cabinet, refer to the KMS fix information and

then proceed as shown in the solution manual

(For models without any fix information,

provide the description)

OR

Mechanical noise is a natural

phenomenon, and apply the 1st level

description. When the customer does not

agree, apply the process by stage.

Describe the basis of the description

in Part related to nose in the Owners

Manual.

E. Noise

Circuit no ise, mechanical noise

Established

dateElectronics 6-3

Revised date 12/13

Error

symptom

12

2009 . 7. 29

2009. 9 .01LED LCD TV



16/47


Replace module

Zoom part with

exterior damage

Module

damage

Cabinet

damage Replace cabinet

Replace remote controllerRemote

controller

damage

Stand

dent Replace stand

F. Exterior defect

Exterior defect

Established

dateElectronics 6-3

Revised date 13/13

Error

symptom

13

2009 . 7. 29

2009. 9 .01LED LCD TV

Standard Repair Process Detail Technical Manual


17/47


Establisheddate


Reviseddate

A1

Error

symptom

Content Check LCD back light with naked eye

A. Video error_No video/Normal audio Electronics 6-3

A1

2009 . 7. 29

2009. 9 .01LED LCD TV

Remove back cover Power On Check backlighting at 4 points.Remove back cover Power On Check backlighting at 4 points.



18/47


Electronics 6-3

Sta da d epa ocess eta ec ca a ua

LED drive B+ 24V measuring method

A. Video error_No video/Normal audio

A2

Establisheddate

Reviseddate

Error

symptom

Content

A2

Measure DC 24V applying to LED drive B/D from Power Board.

Output 24V from Power Board -> supply to LED drive B/D.

Check Pin contacting statement and connection statement.

LED drive B/D

POWERBOARD

2009 . 7. 29

2009. 9 .01LED LCD TV



19/47


Electronics 6-3

p

Check LED drive B/D supply voltage


A3

Establisheddate

Reviseddate

Error

symptom

Content

A3

Check each vol tage output (5.2V,12V,24V) from power board.

2009 . 7. 29

2009. 9 .01

LED LCD TV



20/47


Entry method

1. Press the ADJ button on the remote controller for adjustment.

2. Enter into White Balance of item 6.

3. After recording the R, G, B (GAIN, Cut) value of Color Temp

(Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD.

Electronics 6-3

p

Check White Balance value


A4

Establisheddate

Reviseddate

Error

symptom

Content

A4

2009 . 7. 29

2009. 9 .01

LED LCD TV



21/47


Electronics 6-3

Check LED drive B/D supply voltage


A5

Establisheddate

Reviseddate

Error

symptom

Content

A5


2009 . 7. 29

2009. 9 .01

LED LCD TV



22/47


Check MENU - SETUP - Diagnostics - Signal Strength / Quality

When the signal is strong, use the

attenuator (-10dB, -15dB, -20dB etc.)

TUNER input signal strength checking method

A. Video error_Video error , video lag/stop

A6

Establisheddate

Reviseddate

Error

symptom

Content

Electronics 6-3

A6

2009 . 7. 29

2009. 9 .01

LED LCD TV

Standard Repair Process Detail Technical ManualE


23/47


LED LCD TV Version checking method


1. Checking method for remote controller for adjustment

Press the IN-START with the

remote controller for adjustment

Version

A7

Establisheddate

Reviseddate

Error

symptom

Content

Electronics 6-3

A7

2009 . 7. 29

2009. 9 .01

LED LCD TV

Standard Repair Process Detail Technical ManualA Vid V ti l /H i t l bError


24/47


LED LCD TV connection diagram (1)

A. Video error _Vert ical /Hor izontal bar,residual image, light spot

A8

Establisheddate

Reviseddate

Error

symptom

Content

Electronics 6-3

A8

2009 . 7. 29

As the part connect ing to the external input , checkthe screen condition by signal

2009. 9 .01

LED LCD TV

Standard Repair Process Detail Technical ManualE t bli h dError


25/47


Checking method:

1. Check the signal strength or check whether the screen is normal when the external device is connected.

2. After measuring each voltage from power supply, finally replace the MAIN BOARD.

TUNER checking part


A9

Establisheddate

Reviseddate

Error

symptom

Content

Electronics 6-3

A9

2009 . 7. 29

2009. 9 .01

LED LCD TV

Standard Repair Process Detail Technical ManualEstablishedError 2009 7 29


26/47


Check L ink Cable (LVDS) reconnection condi tion

A. Video error_Color error

A10

Establisheddate

Reviseddate

Error

symptom

Content

Electronics 6-3

A10

Link Cable Contacting Statement Check Area

2009 . 7. 29

2009. 9 .01

LED LCD TV


A Vid C l EstablishedError

El i 6 32009 7 29


27/47


Adjustment Test pattern - ADJ Key


You can view 6 types of patterns using the ADJ Key

Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..)

4.Video error (Classification of MODULE or Main-B/D!)

A11

Establisheddate

Reviseddate

Error

symptom

Content

Electronics 6-3

A11

2009 . 7. 29

2009. 9 .01

LED LCD TV

Standard Repair Process Detail Technical ManualA Video error Vert ical /Hor izontal bar EstablishedError El t i 6 32009 7 29


28/47


LED LCD TV connection diagram (1)

A. Video error _Vert ical /Hor izontal bar,residual image, light spot

A12

Establisheddate

Reviseddate

symptom

Content

LED LCD TVElectronics 6-3

A12

2009 . 7. 29

As the part connect ing to the external input , checkthe screen condition by signal

2009. 9 .01


A Video error Color error EstablishedError

Electronics 6 32009 7 29


29/47


Check L ink Cable (LVDS) reconnection condi tion


A13

Establisheddate

Reviseddate

symptom

Content

Electronics 6-3

A13

Link Cable Contacting Statement Check Area

2009. 7 .29

2009. 9 .01

LED LCD TV


A Video error Color error EstablishedError

Electronics 6-32009 7 29


30/47


Adjustment Test pattern - ADJ Key


You can view 6 types of patterns using the ADJ Key

Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..)

4.Video error (Classification of MODULE or Main-B/D!)

A14

dateRevised

date

symptom

Content

Electronics 6-3

A14

2009 . 7. 29

2009. 9 .01

LED LCD TV


B Power error No power EstablishedError

Electronics 6-32009 . 7. 29


31/47


Check front display LED

B. Power error _No power

A2

dateRevised

date

symptom

Content

Electronics 6 3

A15

ST-BY Statement : Red Power ON Statement : White

Led Color Difference

Mechanical Button

009 9

2009. 9 .01

LED LCD TV


B Power error No power EstablishedError

tElectronics 6-32009 . 7. 29


32/47


Check power input voltage and ST-BY 5V


A14

dateRevised

date

symptom

Content

Electronics 6 3

A16

Power Check Method

1. Check AC220V Input at Power Code.2. Check for Mechanical S/W ON/OFF.

3. Check for connection area and FUSE breaking going to Power

Board

2009. 9 .01

LED LCD TV


B. Power error No power Establishedd t

Error

symptomElectronics 6-3

LED LCD TV2009 . 7. 29


33/47


Checking method when power is ON


A17

dateRevised

date

symptom

Content

A17

Check Method at Power ON

1. Check ST-BY DC 5V Output Voltage at Power Board.2. Check Power On High Voltage (about more than DC1.8) to Power Board

1

2

2009. 9 .01

LED LCD TV


B. Power error No power Establisheddate

Error


LED LCD TV2009 . 7. 29


34/47


_ p

A18

dateRevised

date

symptom

Content

A18


POWER BOARD voltage measuring method 2009. 9 .01

LED LCD TV


B. Power error No power Establisheddate

Error


LED LCD TV2009 . 7. 29


35/47


_ p

A19

dateRevised

date

symptom

Content

A19

Checking mechanical button at bottom or back side

If the mechanical button is selected 'OFF', TV doesn't turn on as well as power led off

This button is applied for saving power consumtion at ST-BY status.

Therefore the position(On or Off) of this mecanical button must be checked before repairingas no power problem.

Mechanical Button

On

LED LCD TV2009. 9 .01


B. Power error_Off when on, of f whi ling viewing Establisheddate

Error

symptomElectronics 6-32009 . 7. 29

LED LCD TV


36/47


Entry method

1. Press the IN-START button of the remotecontroller for adjustment

2. Check the entry into adjustment item 3

POWER OFF MODE checking method A15

dateRevised

date

symptom

Content

A20

2009. 9 .01

LED LCD TV


B. Power error_Off when on, off whil ing viewing Establisheddate

Error


LED LCD TV2009 . 7. 29


37/47


POWER BOARD PIN voltage checking method A21

dateRevised

date

y p

Content

A21


2009. 9 .01

LED LCD TV


C. Audio error_No audio/Normal video Establisheddate

Error


LED LCD TV


38/47


Checking method

1. Press the MENU button on the remote controller

2. Select the AUDIO function of the Menu

3. Select TV Speaker from Off to On

Checking method in menu when there is no audio A16Revised

dateContent

A22

2009. 9 .01

LED LCD TV

C. Audio error_No audio/Normal video Establisheddate

Error


LED LCD TV2009 . 7. 29


39/47


Voltage and speaker checking methodwhen there is no audio

A23Revised

dateContent

A23

Check Procedure at No Sound

Check 24V connector contacting point statement of main board.

Measure 24V input voltage supplied by Power Board (remove connector and check it out if there is no inputvoltage)

Put SPK terminal into tester RX1 -> when touching GND and output terminal, if make Cheuk

Cheuk sound, it is OK.

2009. 9 .01

LED LCD TV

Standard Repair Process Detail Technical ManualEstablished

date

Error

symptomElectronics 6-3C. Audio error_Sound distortion/cut 2009 . 7. 29

LED LCD TV


40/47


Check Procedure at No Sound

24V connector contacting statement of Main Board.

Measure 24V of input voltage supplied by Power Board (If there is no input voltage, remove connector -> checkit out)

Put SPK terminal into tester RX1 -> when touching GND and output terminal, if make CheukCheuk sound, it is OK.

A24Revised

dateContent Voltage and SPK Check Method at Sound Defect

A24

2009. 9 .01

LED LCD TV

D. Function error_ No response in remote contro ller,

key errorEstablished

dateR i d

Error


LED LCD TV


41/47


Remote controller operation checking method A18Revised

dateContent

A25

Check Procedure

1. Check DC5V (P402 PIN #6) onto 5V_ST Terminal

2. When checking Pre-Amp at Power On Statement,

If an indicator of analogue tester is moving a little, It is OK. But If not, it is Pre-Amp defect.

(P402 PIN #8)

Input voltage terminal : 5V_ST, The remote receiving terminal : IR

2009. 9 .01


E. Module & T-Con Board Picture Establisheddate

Revised

Error


LED LCD TV


42/47


The method for checking T-Con B'd A19Revised

dateContent

A26

T-Con Board

1) First of all replace T-Con B'd when abnormal displaying in case LGD module

2) Replace module when abnormal displaying constantly after exchanging T-Con B'd

2009. 9 .01

Appendix : Exchange T-Con Board (1)


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Solder defect, CNT Broken

T-Con Defect, CNT BrokenT-Con Defect, CNT BrokenT-Con Defect, CNT Broken

Solder defect, CNT Broken Solder defect, CNT Broken

Solder defect, CNT Broken Solder defect, CNT Broken Abnormal Power Section

Solder defect, Short/Crack Abnormal Power Section Solder defect, Short/Crack

A - 1/5

Appendix : Exchange T-Con Board (2)


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Abnormal Power Section Solder defect, Short/CrackAbnormal Power Section

Solder defect, Short/Crack Fuse Open, Abnormal power section

NoiseGRADATION GRADATION

Abnormal Display

A - 2/5

Appendix : Exchange LED drive Board


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No Light Dim Light

Dim Light Dim Light

No picture/Sound Ok

A - 3/5

Appendix : Exchange the Module (1)


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Panel Mura, Light leakage Press damage

CrosstalkCrosstalk Press damage

Panel Mura, Light leakage

Press damage

A - 4/5

Un-repairable CasesIn this case please exchange the module.

Appendix : Exchange the Module (2)


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Vertical BlockSource TAB IC Defect

Horizontal Block

Gate TAB IC Defect

Gate TAB IC Defect Gate TAB IC Defect

Vertical LineSource TAB IC Defect

Vertical BlockSource TAB IC Defect

Horizontal Block

Gate TAB IC Defect

Horizontal line

Gate TAB IC Defect

Gate TAB IC Defect

Horizontal Block

Gate TAB IC Defect

A - 5/5

Un-repairable CasesIn this case please exchange the module.

tech bulletin 4[1]

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