LG 55EA9800 Schematic

OLED TV Repair Guide

LGE Internal Use Only

`13 years New Models

< Applicable Model >

55EA9800

Main PCB for Broadband

LGE Internal Use Only

55EA9800

Local Dim.

To PSU

Module

wifi

Motion assy

Clear Speaker

3

2

1

CAM USB

Main processor_Digital(LG1152D),

1

DDR Memory Flash Memory

Main processor_analog(LG1152A)

2

Micom for Key/IR sensing

3

IR + Digital Eye

Front Spk Local Key

4

5

Audio AMP (Max 12W)

4

HDMI switch (4:1)

5

H13 Block diagram

LGE Internal Use Only

DIF(P/N)

Tuner

CVBS

SIF

AUD

M-Remote_Rx/Tx

Motion-R

SCART

PC_AUDIO

AV1

COMP1

HDMI1~4

Logo Light

USB_W-iFi

USB1(USB3.0) USB2(USB2.0) USB3(USB2.0)

USB_CAM

LAN

LNB

SC_CVBS, RGB, Audio L/R

DTV/MNT_LR/V_OUT

PC_Audio_L/R

AV1_Audio L/R

Comp1 Y,Pb,Pr

HDMI_CEC

WOL / WOW

AV1_CVBS

HDMI

Switch

PHY

USB HUB

LG1154A

USB 2.0

USB 3.0

USB 2.0

H13

RMII

BB_TP_DATA

CVBS

DAC_DATA

AAD_DATA

HSR_P/M

16

H13

LG1154D

16

FRC

TCON

8

SPDIF

IRB_SPI

H/P Audio L/R

I2S

LVDS : Quad

H/P AMP

Audio

AMP

CI

IR_B

Micom

OPTIC

IR_Blaster

H/P

SPK/ Clear Speaker

CI

OLED Module

DDR3

4Gb×4 (1600)

DDR3

eMMC

H13 Block diagram

LGE Internal Use Only

DVB-CI/CI+

Tuner

HDMI

DIF

SIF

Audio L/R(4-ch)

SCART out

Line Out

CVBS(3ch)

CVBS-Out

Component(2ch)

H13A H13D

GBB AFE

1ch@30MHz

w/ PLL

BTSC AFE

[email protected]

w/ PLL

1ch L/R

Audio-ADC

SW

24b@48KHz

Audio DAC

SW

(48KHz )

Audio DAC (48KHz)

CVBS DAC

SW SW

CVBS AFE(2-ch)

12b@54MHz

3ch Video

AFE

[email protected]

w/ LLPLL

I2Cx1 I2Cx1

GPIOIx16

SDRAM

(MCP)

Global Baseband

V/Q, DVB-T/C ISDB-T

10x3ch

Capture

Mux

Block (3CH)

LVDS

Tx

Audio PLL

w/ DCO

TS (P)

I2S(External)

I2S

I2S(HPD)

Digital AMP

SPDIF

5x1ch (1ch)

TS(P) TS(P)

AAD

(THAT)

Audio

Mux

Digital Audio

Output

CVBS

Encoder CVD

Y/C

CVBS

LVDS

Rx

HDMI

(1-Link)

HDMI-Rx 1.4 (1-port PHY)

3D, ARC, 4kx2k

TS(S)

System Demux

Audio DSP

Multi-STD

Audio Decoder

LX4 HiFi EP

Sound DSP

Clear Voice II

Perceptual

Volume Control

Slim SPK

DivX

Bluetooth

MCU

Mux

Source Mux

16

TS(S)

DE

TNR

De-interlacer

Main/Sub Scaler

DDR3 Controller

DDR3 PHY

16

Video Decoder

Multi-STD

HD Decoder

(Boda950)

Video Encoder

1080p@30fps

CPU

ARMCA9 Core

Dual 1.2GHz

32KBI$

32KBD$

1MB L2 $

H3D

FRC

SRE

VCR

BE MCU

PE1

LED

OSD

DDR3 Controller

DDR3 PHY

16

GPU Rogue Han

2D GFX

JPG/PNG Decoder

JPG Encoder

TrustZone

Secure Engine

48KB ROM

64KB SRAM

OTP UART Timer

TCON

Output formatter

16

USB2.0x3

UARTx3

GPIOx136

EMAC

SCI

SPIx2

I2Cx10

USB3.0 x1

eMMC

DMAC(8ch)

Timer

WDT

SRAM 16KB

(120Hz)

Vx1/EPI/LVDS Combo

DCO

CPLL

x2

SPLL

DPLL

DDR

PLL

PHY

H13 Block diagram

LGE Internal Use Only

H13 Block diagram

LGE Internal Use Only

TU6503

TDSQ-H651F

[+3.3V_S2_DEMOD] 32

[+3.3V_TUNER] 5

[+.1.8V_TUNER] 7

[+1.23V_S2_DEMOD] 30

[S2_F22_OUTPUT] 33

[LNB] 36

[S2_SCL] 34

[S2_SDA] 35

[RESET] 2

[T/C_DIF[N]] 11

[SLC] 3 [SDA] 4

[ERROR] 16

[SYNC] 17 [VALID] 18 [MCLK] 19

[D0] 20 [D1] 21 [D2] 22 [D3] 23 [D4] 24 [D5] 25 [D6] 26 [D7] 27

+3.3V_D_Demod

+3.3V_TU

+1.8_TU

+1.23V_D_Demod

LNB_TX LNB_OUT

I2C_SCL4 I2C_SDA4

/TU_RESET1 IC2_SCL6 IC2_SDA6

FE_DEMOD1_TS_ERROR FE_DEMOD1_TS_SYNC FE_DEMOD1_TS_VAL FE_DEMOD1_TS_CLK

FE_DEMOD1_TS_DATA [0-7]

+3.3V_NORMAL

3.3K Ω

22 Ω

33 Ω

10 [TONECTRL] 2 [LNB] 7 [SCL] 8 [SDA]

AP6 [SCL3] AR6 [SDA3]

AG6 [GPIO10] AH34 [SCL5] AH33 [SDA5]

AL37 [TP_DVB_ERR] AL36 [TP_DVB_SOP] AL35 [TP_DVB_VAL] AM36 [TP_DVB_CLK]

AM35 [TP_DVB_DATA0] AN36 [TP_DVB_DATA1] AN37 [TP_DVB_DATA2] AN35 [TP_DVB_DATA3] AP37 [TP_DVB_DATA4] AP36 [TP_DVB_DATA5] AR37 [TP_DVB_DATA6] AR37 [TP_DVB_DATA7]

A8303SESTR-TB

LNB

IC6900

H13

LG1154D

[S2_RESET] 31

[T/C_DIF[P]] 10 [T/C_DIF[N]] 11

/S2_RESET

IF_P IF_N TUNER_SIF TU_CVBS IF_AGC

FILTER

ADC_I_INP

ADC_I_INN

AG5 [GPIO9]

U17 [ADC_I_INP] V17 [ADC_I_INN]

H13

LG1154A

H13 Block diagram

LGE Internal Use Only

Jack Side SOC Side

AV1

Phone JACK

FULL

SCART

(18P)

Component 1

Phone JACK

AV1_CVBS_IN

AV_L/R_IN

SC_CVBS_IN

SC_R/G/B

/CVBS_IN_SOY

SC_L/R_IN

COMP1_Y/Pb/Pr

AV1_CVBS_IN_SOC

AUAD_L/R_CH2_IN

SC_CVBS_IN_SOC

COMP1_PR_IN_SOC COMP1_Y_IN_SOC COMP1_PB_IN_SOC COMP1_Y_IN_SOC_SOY

AUAD_L/R_CH3_IN

COMP2_PB_IN_SOC

COMP2_Y_IN_SOC COMP2_Y_IN_SOC_SOY COMP2_PR_IN_SOC

[CVBS_IN3]

[AUAD_L/R_CH2_IN]

[CVBS_IN2]

[PR1/Y1/PB1/SOY1_IN]

H13

(LG1154A)

[AUAD_L/R_CH3_IN]

[PB2/Y2/SOY2/PR2_IN]

Tuner

TU_CVBS_IN

SIF DIF[P/N]

TU_CVBS_IN_SOC

TUNER_SIF ADC_I_INP/INN

[CVBS_IN1]

[AAD_ADC_SIF] [ADC_I_INP/INN]

H13 Block diagram

LGE Internal Use Only

SC_L/R_IN

AV_L/R_IN

[AUAD_L_CH1_IN]

[AUAD_L_CH3_IN]

[AUAD_L_CH2_IN]

[AUD_SCART_OUTL/OUTR]

SCART_Lout/Rout

AZ4580MTR

OP AMP

DTV/MNT_L/R_OUT

Mute

CTRL

[TR]

pi filter

MICOM

SCART

SCART_MUTE

AUDIO L/R OUT

[DACSCK] [DACLRCK] [DACLRCH]

[SCL0/SDA0]

[GPIO21]

AUD_SCK/LRCK/LRCH

I2C_SCL1/SDA1

AMP_RESET_N

MAIN

TAS5733

4P wafer

LPF

H13

LG1154

AMP_MUTE

MICOM

Tuner

TUNER_SIF

[AAD_ADC_SIF]

[PHY0_ARC_OUT_0]

[AUDA_OUTL]

[IEC958OUT]

HP_L/ROUT_MAIN

SPDIF_OUT

TPA6138A2 Headphone

SIDE_HP_MUTE

AMP

WOOFER

TAS5733

LPF

2P wafer

LPF

HEAD PHONE & line out

SPDIF_OUT_ARC

H13 Block diagram

LGE Internal Use Only

H13

LG1154D

HDMI_S/W_RESET

HDMI_INT

SPDIF_OUT_ARC

HDMI Out put 8bits

I2C_SCL/SDA 5 2bits

HDMI

Switch

(IC3201 / SII9587CNUC)

CEC_REMOTE

SPDIF_OUT_ARC

HDMI1

TMDS Link 8bits

CEC_REMOTE

DDC_I2C 2bits

HDMI2

TMDS Link 8bits

CEC_REMOTE

DDC_I2C 2bits

HDMI3

TMDS Link 8bits

CEC_REMOTE

DDC_I2C 2bits

MICOM

(IC3000 /

R5F100GEAFB)

OCP (IC3202 / TPS2051)

TMDS Link 8bits

DDC_I2C 2bits

MHL_DET

HDMI4

CEC_REMOTE

H13 Block diagram

LGE Internal Use Only

[USB2_2_DP0 / DM0]

[EB_CS2/GPIO92]

[USB2_1_DP0 / DM0]

[USB2_0_DP / DM]

[USB3_DP0/DM0] [USB3_RX0P / M]

[USB3_TX0P / M]

[HUB_VBUS_CTRL0]

[HUB_PORT_OVER0/1]

[UART1_RXD / TXD]

[GPIO15 / GPIO18]

H13

LG1154D

[GPIO13]

USB2_HUB_IC_IN_DP / DM

USB_CTL2

USB2_ DP2 / DM2

WIFI_DP / DM

USB3_DP / DM USB3_RX0P/RX0M

USB3_TX0P/TX0M

USB_CTL2

/USB_OCD1

M_REMOTE_RX / TX M_REMOTE_CTS / RTS

M_REMOTE_RESET

USB HUB

USB2512B-AEZG

USB_CTL3

Motion Remote

USB_CAMERA_DP / DM

USB_DP3 / DM3

OCP USB2/3

TPS2062C

OCP USB1

TPS2554

Receiver

+5V_USB3

+5V_USB2

+5V_USB1

USB_Camera

(구주7600 - Ready)

USB3

USB2

USB_WIFI

USB1 (USB3.0, PVR Ready)

CAM_DET

(R5F100GEAFB)

WOL/WOW_POWER_ON

MICOM

[UART0_RXD]

[UART0_TXD]

SOC_TX

MICOM

(R5F100GEAFB)

SOC_RX

SOC_TX

SOC_RX

4Pin debugging

Wafer

P3800

Interconnection - 1

LGE Internal Use Only

55EA9800

[PCBs]

5

4

2

3

6

1

Main PCB

2

PSU

3

WIFI ASSY

4

BT MOTION ASSY

5

IR PCB

6

Touch Key / Logo

Contents of LCD TV Standard Repair Process

LGE Internal Use Only

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

1

2 No video/No audio 2

3 Picture broken/ Freezing 3

4 Color error 4

5

6

7

8

9 Wrecked audio/discontinuation/noise 9

10

11

A. Video error

B. Power error

C. Audio error

No video/Normal audio 1

Vertical/Horizontal bar, residual image,

light spot, external device color error

No power 6

Off when on, off while viewing, power

auto on/off

No audio/Normal video 8

Remote control & Local switch checking

MR13 operating checking 11

5

7

10

12

13 Camera operating checking 13

14 External device recognition error 14

15 E. Noise Circuit noise, mechanical noise 15

16 F. Exterior error Exterior defect 16

D. Function error

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

Wifi operating checking 12

Standard Repair Process

LGE Internal Use Only

Established

date

Revised date

2013.01.31

LCD TV

Error

symptom

A. Video error

No video/ Normal audio

First of all, Check whether all of cables between board is inserted properly or not.

(Main B/D↔ Power B/D, EPI Cable,Speaker Cable,IR B/D Cable,,,)

☞A18 ☞A1

N

Y

Check OLED Light On with naked eye

☞A18

Check Power Board 24V output

On

Normal voltage

N

Repair Power Board or parts

Y N Check Power

Board

24V, 12V,3.5V etc.

Replace Inverter

Y

or module

Normal

voltage

N

Repair Power Board or parts

End

Replace T-con

Y

Board or module And Adjust VCOM

No video Normal audio

Normal

audio

Move to No video/No audio

1/16

※Precaution

Always check & record S/W Version and White Balance value before replacing the Main Board

☞A4 & A2

Replace Main Board

1

Re-enter White Balance value

Standard Repair Process

LGE Internal Use Only

LCD TV

Error

symptom

No Video/ No audio

☞A18

Check various voltages of Power Board ( 3.5V,12V,20V or 24V…)

A. Video error

No video/ No audio

Normal

voltage?

Replace Power Board and repair parts

Y

N

Check and replace MAIN B/D

Established

date

Revised date

End

2013.01.31

2/16

2

Standard Repair Process

LGE Internal Use Only

LCD TV

☞ A3

Check RF Signal level

Normal Signal?

N

Check RF Cable

Connection

1. Reconnection

2. Install Booster

Normal

Picture?

Y

Close

Y

N

Error

symptom

A. Video error

Picture broken/ Freezing

. By using Digital signal level meter . By using Diagnostics menu on OSD

( Setting→ Set up→ Manual Tuning → Check the Signal )

- Signal strength (Normal : over 50%)

- Signal Quality (Normal: over 50%)

Check whether other equipments have problem or not.

(By connecting RF Cable at other equipment)

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

☞ A4

Normal

Picture?

Contact with signal distributor

or broadcaster (Cable or Air)

Y

N

Check

S/W Version

Bulletin?

S/W Upgrade

SVC

Y

Normal

Picture?

Y

Established

date

Revised date

N

2013.01.31

Check

Tuner soldering

N

Replace

Main B/D

3/16

Y

Close

3

Standard Repair Process

LGE Internal Use Only

LCD TV

☞A6

Check color by input

-External Input

-COMPONENT

-AV

-HDMI

☞A8

Check Test pattern

Error

symptom

Color

error?

N

Check error color input mode

A. Video error

☞ A7

※ Check

and replace

Y

Link Cable (EPI) and contact condition

External Input/

Component

error

Color error

Check external device and cable

Color

error?

N

Y

Replace Main B/D

Established

date

Revised date

External device

/Cable

normal

N

Color

error?

End

Y

2013.01.31 4/16

Y

Replace module

N

Replace Main B/D

HDMI error

Check external

device and cable

4

Request repair

for external

device/cable

N

External device

/Cable

normal

Y

Replace Main B/D

Standard Repair Process

LGE Internal Use Only

A. Video error

LCD TV

Error

symptom

Vertical / Horizontal bar, residual image,

light spot, external device color error

Vertical/Horizontal bar, residual image, light spot

☞A6

Check color condition by input

-External Input

-Component

-HDMI

☞A8

Check Test pattern

Screen

normal?

N

Replace module

Check external

Y

device connection condition

Normal?

N

Request repair

for external device

External device screen error-Color error

☞ A7

Check and

Y

replace Link Cable

Established

date

Revised date

Screen

normal?

End

N

Y

2013.01.31

Replace Main B/D (adjust VCOM)

For LGD panel

Replace Main B/D

For other panel

5/16

Replace Module

N

Screen

normal?

Y

End

Check S/W Version

Check

version

S/W Upgrade

Normal

screen?

End

N

Y

N

Y

Check screen condition by input

-External Input

-Component

-HDMI/DVI

External

Input

error

Component

error

HDMI/

DVI

5

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.

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.

Screen

normal?

Request repair for external device

Screen

normal?

N

Y

N

Replace Main B/D

Standard Repair Process

LGE Internal Use Only

LCD TV

symptom

☞A17

Check Logo LED

. Stand-By: Red or Turn Off . Operating: Turn Off

Power LED

Check Power cord was inserted properly

Error

On?

N

Normal?

Y

Close

Y

N

※

Check ST-BY 3.5V

☞A18

B. Power error

No power

DC Power on by pressing Power Key On Remote control

Normal

voltage?

Y

N

Established

date

2013.01.31

Revised date

☞A18

Y

N

Check Power On ‘”High”

Replace Main B/D

Normal

operation?

☞A18

Measure voltage of each output of Power B/D

N

Y

Replace Main B/D

Normal

voltage?

Replace Power B/D

OK?

Y

6/16

Replace

Power B/D

Replace Power B/D

6

Standard Repair Process

LGE Internal Use Only

LCD TV

Check outlet

Check A/C cord

Check for all 3- phase power out

Error

symptom

Error?

Y

Fix A/C cord & Outlet and check each 3 phase out

B. Power error

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

☞A19

N

Check Power Off Mode

☞A18

(If Power Off mode is not displayed) Check Power B/D voltage

※ Caution Check and fix exterior of Power B/D Part

Abnormal

Established

date

Revised date

CPU

1

Normal

voltage?

Replace Power B/D

Replace Main B/D

Y

N

2013.01.31

Replace Power B/D

Replace Main B/D

Normal?

N

7/16

Y

End

* Please refer to the all cases which can be displayed on power off mode.

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

Normal

Abnormal

"POWEROFF_ONTIMER" Power off by ON TIMER "POWEROFF_20V_DET" Power off by AC OFF "POWEROFF_RESREC" Power off by Reservated Record "POWEROFF_RECEND" Power off by End of Recording "POWEROFF_SWDOWN" Power off by S/W Download

"POWEROFF_UNKNOWN" Power off by unknown status except listed case

"POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal

7

Standard Repair Process

LGE Internal Use Only

LCD TV

No audio Screen normal

Error

C. Audio error

symptom

No audio/ Normal video

☞A20 ☞A21+A18

Check user menu > Speaker off

Off

Y

Cancel OFF

Check audio B+ 24

N

of Power Board

Established

date

Revised date

Normal voltage

Replace Power Board and repair parts

Y

N

2013.01.31 8/16

Check Speaker disconnection

Disconnection

Y

Replace Speaker

8

N

Replace MAIN Board

End

Standard Repair Process

LGE Internal Use Only

LCD TV

Check input signal

-RF

-External Input

signal

Error

symptom

C. Audio error

Wrecked audio/ discontinuation/noise

Established

date

Revised date

2013.01.31

→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio

☞A21+A18

Check audio B+ Voltage (24V)

Y

Normal

voltage?

N

Replace Power B/D

Replace Main B/D

N

audio?

Y

Signal

normal?

N

Y

(When RF signal is not received)

Request repair to external

cable/ANT provider

(In case of

External Input

signal error) Check and fix external device

Wrecked audio/

Discontinuation/

Noise for

all audio

Wrecked audio/

Discontinuation/

Noise only

for D-TV

Wrecked audio/

Discontinuation/

Noise only

for Analog

Wrecked audio/

Discontinuation/

Noise only

for External Input

Check and replace speaker and connector

Replace Main B/D

Connect and check other external device

Normal

9/16

End

Check and fix external device

9

Standard Repair Process

LGE Internal Use Only

D. Function error

Remote control & Local switch checking

LCD TV

Error

symptom

1. Remote control(R/C) operating error

☞A22

Check R/C itself

Operation

Check R/C Operating

When turn off light

in room

If R/C operate, Explain the customer cause is interference

from light in room.

operating?

Normal

Y

N

Check & Replace

Baterry of R/C

Normal

operating?

Replace R/C

Check & Repair Cable connection Connector solder

Y

Close

N

Normal

operating?

Y

Close

☞A22

Check B+

N

On Main B/D

Established

date

Revised date

Y

N

3.5V

Normal

Voltage?

☞A18

Check 3.5v on Power B/D

Replace Power B/D or

Replace Main B/D

(Power B/D don’t have problem)

2013.01.31

☞A22

Check IR

Output signal

10/16

Replace

Main B/D

Normal

Signal?

N

Repair/Replace

IR B/D

Y

10

Standard Repair Process

LGE Internal Use Only

D. Function error

MR13/P operating checking

LCD TV

Error

symptom

2. MR13/P (Magic Remocon) operating error

☞A4

Check the

INSTART menu

RF Receiver ver

is “00.00”?

☞A23

Check & Repair

connection

Y

RF assy

☞A4

RF Receiver ver

is “00.00”?

Y

N

Check MR13/P

itself Operation

N

Close

Normal

operating?

Check & Replace

Battery of MR13/P

Normal

operating?

Replace

MR13

Y

N

Y

N

Press the

wheel

Close

Established

date

Revised date

Is show ok

message?

Y

Close

Is show ok

message?

Close

Y

2013.01.31

Turn off/on the

N

set and press

the wheel

N

11/16

Press the back key about 5sec

Down load the Firmware

* INSTART MENU02.11

Remocon Test3. Firmware

download

•If you conduct the loop at 3times, change the

MR13/P.

11

Standard Repair Process

LGE Internal Use Only

LCD TV

Error

symptom

3.Wifi operating error

☞A4

Check the

INSTART menu

Wi-Fi Mac value

is “NG”?

☞A24

Check & Repair

Y

Wifi cable

connection

☞A4

Wi-Fi Mac value

is “NG”?

D. Function error

Wifi operating checking

☞A24

N

Check the Wifi wafer

N

Close

1pin

Established

Revised date

Normal

Voltage?

Y

Close

date

N

2013.01.31 12/16

Replace

Main B/D

Change the Wifi

Y

assy

12

Standard Repair Process

LGE Internal Use Only

LCD TV

Error

symptom

4.Camera operating error

☞A4

Check the

INSTART menu

☞A25

Check & Repair

Camera cable

☞A4

D. Function error

Camera Ver.

is “NG”?

Y

connection

Camera Ver.

is “NG”?

Camera operating checking

☞A25

N

Check the Camera wafer

P4200 2pin

N

Close

Established

Revised date

Normal

Voltage?

Y

Close

date

N

2013.01.31 13/16

Replace

Camera B/D

Change the

Camera assy

Y

13

Standard Repair Process

LGE Internal Use Only

LCD TV

Check input signal

Error

symptom

Y

Signal

input?

N

Check and fix

external device/cable

D. Function error

External device recognition error

Check technical information

- Fix information

- S/W Version

Technical

information?

Fix in

accordance

with technical

information

Y

External Input and

N

Component

Recognition error

HDMI/

DVI, Optical

Recognition error

Established

date

Revised date

2013.01.31 14/16

Replace Main B/D

14

Standard Repair Process

LGE Internal Use Only

LCD TV

Identify nose type

Error

symptom

Circuit

noise

Mechanical

noise

※ 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 Owner’s Manual.

Check location of noise

Circuit noise, mechanical noise

E. Noise

Replace PSU

※ When the nose is severe, replace the module (For models with fix information, upgrade the S/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)

Established

date

Revised date

2013.01.31 15/16

15

Standard Repair Process

LGE Internal Use Only

LCD TV

Error

symptom

Zoom part with exterior damage

F. Exterior defect

Module

damage

Cabinet

damage

Remote

controller

damage

Exterior defect

Replace module

Replace cabinet

Replace remote controller

Established

date

Revised date

2013.01.31 16/16

Stand

dent

Replace stand

16

Contents of LCD TV Standard Repair Process Detail Technical Manual

LGE Internal Use Only

No. Error symptom Content Page Remarks

1

A. Video error_ No video/Normal audio

2 Check White Balance value A2

4

A. Video error_ video error /Video lag/stop

5 LCD-TV Version checking method A4

6 Tuner Checking Part A5

A. Video error _Vertical/Horizontal bar,

7

residual image, light spot

8

A. Video error_ Color error

9 Adjustment Test pattern - ADJ Key A8

10

11 Exchange Main Board (2) A-2/5

12 Exchange Power Board (PSU) A-3/5

Defected Type caused by T-Con/

Inverter/ Module

13 Exchange Module (1) A-4/5

Check LCD back light with naked eye A1

TUNER input signal strength checking method

LCD TV connection diagram A6

Check Link Cable (EPI) reconnection condition

Exchange Main Board (1) A-1/5

A3

A7

14 Exchange Module (2) A-5/5

Continue to the next page

Contents of LCD TV Standard Repair Process Detail Technical Manual

LGE Internal Use Only

Continued from previous page

No. Error symptom Content Page Remarks

16

B. Power error_ No power

17 Check power input Voltage & ST-BY 3.5V A18

18

19

20

21

22

23 Wifi operation checking method A24

24 Camera operation checking method A25

25 E. Etc Tool option changing method A26

B. Power error_Off when on, off while viewing

C. Audio error_ No audio/Normal video

D. Function error

Check front display LED A17

POWER OFF MODE checking method A19

Checking method in menu when there is no audio

Voltage and speaker checking method

when there is no audio

Remote controller operation checking method

Motion Remote operation checking method

A20

A21

A22

A23

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

A. Video error_No video/Normal audio

Check LCD back light with naked eye

Established

date

Revised

date

2013.01.31

A1

After Remove the Rear Cover, turning on the power and disassembling the case, check with the naked eye.

A1

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

A. Video error_No video/Normal audio

Check White Balance value

Established

date

Revised

date

2013.01.31

A2

Entry method

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

2. Enter into White Balance of item 6.

2. Enter into White Balance of item 9.

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

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.

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

A2

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

A. Video error_Video error, video lag/stop

TUNER input signal strength checking method

Established

date

Revised

date

2013.01.31

Settings  Channel  Manual Tuning  select channel

A3

When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.)

A3

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

Version

A. Video error_Video error, video lag/stop

LCD-TV Version checking method

1. Checking method for remote controller for adjustment

Established

date

Revised

date

2013.01.31

A4

Press the IN-START with the remote controller for adjustment

A4

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

A. Video error_Video error, video lag/stop

TUNER checking part

Established

date

Revised

date

2013.01.31

A5

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.

A5

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

A. Video error _Vertical/Horizontal bar,

residual image, light spot

LCD TV connection diagram (1)

Established

date

Revised

date

2013.01.31

A6

As the part connecting to the external input, check the screen condition by signal

A6

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

Check Link Cable (EPI) reconnection condition

A. Video error_Color error

Established

date

Revised

date

2013.01.31

A7

Check the contact condition of the Link Cable, especially dust or mis insertion.

A7

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

A. Video error_Color error

Adjustment Test pattern - ADJ Key

Established

date

Revised

date

2013.01.31

A8

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!)

A8

Appendix : Exchange the Module (1)

LGE Internal Use Only

Vertical Block

Crosstalk

Brightness difference

Press damage

Line Dim

Crosstalk

Un-repairable Cases In this case please exchange the module.

Burnt

A – 1/2

Appendix : Exchange the Module (2)

LGE Internal Use Only

Angle view Color difference Brightness dot noise Half dead

Brightness difference

Mura

Green Noise on power on/off time

Line Defect

Un-repairable Cases In this case please exchange the module.

A – 2/2

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

B. Power error _No power

Check front display Logo

Screen

Established

date

Revised

date

2013.01.31

A17

Power button

Front LED control : Menu  Option  Standby Light  ON/ Off

A17

Speaker

LG logo Light

Remote control sensor

ST-BY condition: On or Off Power ON condition: Turn Off

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

B. Power error _No power

Check power input voltage and ST-BY 3.5V

Check the DC 24V, 12V, 3.5V.

Established

date

Revised

date

2013.01.31

18 Pin (Power Board ↔ Main Board)

A18

1

3

5

7

9

11

13 12V 14

15 12V 16

17 GND 18

Power on

3.5V

GND

24V

GND

2

4

6

8

10

12

DRV ON

20V

N.C

GND

24V

GND

12V

24V

GND

A18

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

B. Power error _Off when on, off whiling viewing

POWER OFF MODE checking method

Established

date

Revised

date

2013.01.31

A19

Entry method

1. Press the IN-START button of the remote

controller for adjustment

2. Check the entry into adjustment item 3

A19

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

C. Audio error_No audio/Normal video

Checking method in menu when there is no audio

Established

date

Revised

date

2013.01.31

A20

Checking method

1. Press the Setting button on the remote controller

2. Select the Sound function of the Menu

3. Select the Sound Setting

4. Select TV Speaker

A20

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

Error

LCD TV

symptom

Content

Checking order when there is no audio

C. Audio error_No audio/Normal video

Voltage and speaker checking method when there is no audio

②

24 Pin (Power Board ↔ Main Board)

1

Power on 3 5 7 9

11 13 12V 14 15 12V 16

17 GND 18

19 GND 20 21 GND 22 23 L/DIM0_MOSI 24 L/DIM0_SCLK

GND

3.5V

24V

Established

2 4 6

8 10 12

L/DIM0_V8

date

Revised

date

INV ON PDIM#1 PDIM#2

GND

24V

GND

12V

24V

GND

2013.01.31

A21

③

①

③

① Check the contact condition of or 24V connector of Main Board

② Measure the 24V input voltage supplied from Power Board

(If there is no input voltage, remove and check the connector)

③ Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the

GND and output terminal, the speaker is normal.

A21

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

Remote controller operation checking method

D. Function error

Established

date

Revised

date

2013.01.31

A22

①

②

③

P4002 1 2 3 4 5 6 7 EYE SCL 8 EYE SDA

KEY2

+3.5V_ST

GND

LOGO Light Wafer

IR

GND

Checking order 1, 2. Check Touch cable condition between Touch & Main board.

3. Check the st-by 3.5V on the terminal 4,7.

4. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog Tester needle moves slowly, and defective when it does not move at all.

A22

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

①

Error

symptom

Content

Motion Remote operation checking method

D. Function error

②

Established

date

Revised

date

2013.01.31

③

1 2 3 4 5 6 7 GND 8 TX 9 WOL

10 RESET

11 GND

12 CTS

13 NC

14 +3.5V_ST(OLED)

15 IR(OLED)

16 GND

17 EYE_SCL

18 EYE_SDA

A23

P4003

+3.5V_WOL

+3.3V

USB_DM

RTS

USB_DP

RX

Checking order 1, 2. Check Motion cable condition between Motion assy & Main board.

3. Check the 3.3V on the terminal 2.

A23

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

①

Wifi operation checking method

D. Function error

②

Established

date

Revised

date

2013.01.31

③

1 2 3 4 5 6 7 GND 8 TX 9 WOL

10 RESET

11 GND

12 CTS

13 NC

14 +3.5V_ST(OLED)

15 IR(OLED)

16 GND

17 EYE_SCL

18 EYE_SDA

A24

P4003

+3.5V_WOL

+3.3V

USB_DM

RTS

USB_DP

RX

Checking order 1, 2. Check Wifi cable condition between Wifi assy & Main board.

3. Check the 3.3V on the terminal 2.

A24

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

①

Error

symptom

Content

Camera operation checking method

D. Function error

②

Established

date

Revised

date

2013.01.31

1 2 3 4 5 6 7 CAM_PWR_ON_CMD 8 ST_BY_DET_CAM 9 GND

10 USB_CAMERA_DP

11 USB_CAMERA_DM

12 GND

A25

P4200

CAM_SLIDE_DET

+3.5V_CAM

AUD_LRCH

AUD_LRCK

AUD_SCK

GND

Checking order 1, 2. Check Camera cable condition between Camera assy & Main board.

3. Check the 3.5V on the terminal 2.

A25

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

Tool option changing method

E. Etc

②

Established

date

Revised

date

2013.01.31

A26

①

Changing method

1. Contact the USB memory. (USB 1,2,3 jack)

2. Enter the password. (ex. 000000)

* Access USB Memory has each password.

A26