LG LH9000 Series Montageanleitung

LED LCD TV Repair Guide

New models 2009

Applicable to model numbers xxLH9000

www.television-magazine.co.uk

LGE3369A

IC100

RGB

COMPONENT

F-SCART

AV3

BUF_TS_CLK/ERR/SYN/DATA

[0]

AV_CVBS_IN

COMP_Y/Pb/Pr

SC1_CVBS_IN

SC2_CVBS_IN

DSUB_ R/G/B

74LVC541A

Buffer

IC502

CI Slot

FE_VMAIN

FE_TS_DATA[0:7]

ÆCI_MDI[0:7]

H-SCART

SC1_R/G/B

FE_

VOUT

DTV/MNT_VOUT

MAX3232CDR

IC403

SPDIF SPDIF_OUT

DSUB_H/VSYNC

CI_TS_DATA[0:

CI_Data[0:7]ÅPCM_D[0:7]

PCM_A[8:14]

AUDIO IN

(PC)

DGB_TX/RX

DDR2 SDRAM

(1Gb)

IC300

NAND Flash

IC102

(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 Flash

For Boot

IC103

HDMI

1/2/3

Rear :

LGE7329A

IC900

Panel

LED

200Hz

TMDS351PAGR

IC604

TMDS[0:7

]

HDMI_CEC

HPD

5V_HDMI

I2C

1. LH9000-ZA Block Diagram

TDFW-G235D

TU1200

74LCX244

Buffer

IC501

PCM_A[0:

CI_ADDR[0:7]

LVDS

EEPROM

IC105

I2C

SPI_CK/CS/D0/D

Side AV

USB0_DM/DP

HDMI

4 Side

AUDIO Out (Head

Phone)

RS-232C

DDR2 SDRAM

(512Mb)

IC301

Digital amp

(NTP3100L)

IC701

I2S L/R

TMDS[0:7

]

HPD,

5V_HDMI

Audio

Switch

IC702

AUDIO Out (B/T

Headset)

LG5110

IC3502

LVDS

Local Key

LED A’ssy

IR & RGB Sensor

DDR2 SDRAM

(512Mb)

IC1000/IC1001

EEPROM

IC3504

Serial Flash

IC902

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ⓒLG Electronics. Inc.2009

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

A. Video error

Vertical/Horizontal bar, residual image,

light spot, external device color error 5

6Nopower 6

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

on/off 7

8 No audio/Normal video 8

9C. Audio error Wrecked audio/ discontinuation/ noise 9

10 No response in remote controller, key error 10

11 D. 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.

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ⓒLG Electronics. Inc.2009

Normal

audio Y

Move to No

video/No audio

No video

Normal audio Check Back Light

On with naked eye On Y

Check Power

Board

12v,5v etc.

Normal

voltage Y

Replace Main Board

Repair Power

Board or parts

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

Normal

voltage YReplace LED

Drive B/D or

module

Repair Power

Board or parts

End

Always check & record S/W Version and White

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

※Precaution

Established

date Electronics 6-3

Standard Repair Process

Revised date

2009. 7 .29

1/13

Error

symptom A. Video error

No video/ Audio OK

☞A3☞A1

☞A2

☞A4 & A7

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 .01

LED LCD TV

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ⓒLG Electronics. Inc.2009

Normal

voltage?

Check various

voltages of Power

Board ( 5V,12V,20V

or 24V…)

No Video/

No audio

Check and

replace

MAIN B/D

Replace Power

Board and repair

parts

NEnd

Standard Repair Process

A. Video error

No video/ No audio

☞A5

Established

date Electronics 6-3

Revised date 2/13

Error

symptom

2009 . 7. 29

2009. 9 .01

LED LCD TV

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ⓒLG Electronics. Inc.2009

A. Video error

Picture broken/ Freezing

☞A6

Check RF Signal level

Normal

Signal?

Check RF Cable

Connection

1. Reconnection

2. Install Booster

Check

S/W Version

Booster menu

On→Off: Check

Off→On: 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?

Normal

Picture? YClose

■Menu→Setup →Booster

. By using Digital signal level meter

. By using Diagnostics menu on OSD

( Menu→Setup→Diagnostic)

- Signal strength (Normal : over 50%)

- Signal Quality (Normal: over 50%)

Normal

Picture? Y

Contact with signal distributor

or broadcaster (Cable or Air)

Normal

Picture?

☞A7

Standard Repair Process

Established

date Electronics 6-3

Revised date 3/13

Error

symptom

2009 . 7. 29

2009. 9 .01

LED LCD TV

www.television-magazine.co.uk

ⓒLG Electronics. Inc.2009

Color

error?

※Check

and replace

Link Cable

(LVDS) and

contact

condition

Replace Main B/D

Color

error?

Check error

color input

mode

Check color by input

-External Input

-COMPONENT

-RGB

-HDMI/DVI

External device

/Cable

normal

External Input/

Component

error

Check

external

device and

cable

External device

/Cable

normal

RGB/

HDMI/DVI

error

Check external

device and

cable

Replace Main B/D

A. Video error

Color error

☞A8

End

Replace module

Request repair

for external

device/cable

Replace

T-Con

Board N

Color

error?

LGD Module

Only

Other Module

Color

error?

Check Test pattern

☞A11

☞A10 ☞A27

Standard Repair Process

Established

date Electronics 6-3

Revised date 4/13

Error

symptom

2009 . 7. 29

2009. 9 .01

LED LCD TV

www.television-magazine.co.uk

ⓒLG Electronics. Inc.2009

Screen

normal?

YCheck external

device

connection

condition

Check and

replace Link

Cable

Normal?

Screen

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.

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 of

External Input, Component,

RGB and HDMI/DVI by

connecting Jig, pattern

Generator ,Set-top Box etc.

Replace

Main B/D

Screen

normal?

Check S/W Version

Check

version

S/W Upgrade

Normal

screen?

End

Replace T-Con Board

LGD Module Only

Replace

Module

Other Module

Replace module

in abnormal displaying

after exchanging T-Con B'd

End

Established

date Electronics 6-3

Revised date 5/13

Error

symptom

Standard Repair Process

☞A12 ☞A13

Check Test pattern

☞A27

Screen

normal?

2009 . 7. 29

2009. 9 .01

LED LCD TV

www.television-magazine.co.uk

ⓒLG Electronics. Inc.2009

B. Power error

No power

Power LED

On? Y

DC Power on

by pressing Power Key

On Remote control

Normal

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

Normal

voltage? Replace Main B/D

OK?

Replace Main B/D

Normal? Check ST-BY 5V

Replace Power B/D

Normal

voltage?

Replace Power

B/D

☞A15

☞A16

☞A17

☞A18

Standard Repair Process

Established

date Electronics 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

→Doesn’t turn on by remote control

→Doesn’t appear LED light

Please refer to the A21 Page

. Stand-By: Red

. Operating: Green

Check & Repair

Mechanical Power switch

on Local control of TV

※

☞A19

2009 . 7. 29

2009. 9 .01

LED LCD TV

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B. Power error

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

Error? N

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/D

CPU

Abnormal

(If Power Off mode

is not displayed)

Check Power B/D

voltage

Replace Main B/D

Normal

voltage?

Replace Power B/D

Normal? End

※Caution

Check and fix exterior

of Power B/D Part

☞A20

☞A21

Established

date Electronics 6-3

Revised date 7/13

Error

symptom

Standard Repair Process

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 trouble

Abnormal "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal

* Please refer to the all cases which

can be displayed on power off mode.

Abnormal

2009 . 7. 29

2009. 9 .01

LED LCD TV

www.television-magazine.co.uk

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