LG XXLA74*-Z, XXLA71*-Z, XXLA69/66*-Z, XXLA64/62/61*-Z, XXLN57*-Z Schematic

2013 LED/LCD TV

LGE Internal Use Only

Engineering guide

< Applicable Model : Mid-end Platform >

XXLA74*-Z* XXLA71*-Z* XXLA69/66*-Z* XXLA64/62/61*-Z* XXLN57*-Z*

1/ 88

◈ CONTENT ◈

LGE Internal Use Only

1. New features

2. Main PCBs

3. Block Diagrams, IIC Map

4. Structure of TV set and connection of sub ass’ys

5. New sub ass’ys

- Instruction of new sub ass’ys

6. Adjust way of new features

7. Repair guide

2/ 88

EPI Interface

LGE Internal Use Only

EPI(Embedded Point-Point Interface)

Features

• Point-Point topology (support 2 Pair option)

• CDR (Clock Data Recovery)

• Bandwidth up to 1.85Gbps/pair

at FHD 120Hz 10 bit application

• Lock signal cascading and feedback to T-Con

• Embedded Control Data

Merits

VCC

TCON

LOCK

2

1

Figure1. Topology

• Better reliability on common noise

• No data skew and better EMI margin

• Fewer lines than mini-LVDS

• Slim PCB design

3/ 88

EPI Interface (mini-LVDS vs. EPI)

LGE Internal Use Only

Comparison

HF mini-LVDS

HF mini-

LVDS

No. of Signal 36 36 72

Connector

60Hz 120Hz 240Hz

60pin

(2ea)

-Difficult to upgrade bandwidth limit

-Multiple number of wires needed for higher bandwidth

EPI (Embedded clock P-to-P Interface)

EPI

No. of Signal 12 12 32

Connector -

-Better reliability on common noise

-No data skew. Better EMI margin

-Lower cost ( Cable, Connector )

-Slim S-PCB design (14mm Æ 10mm) helps slimmer TV

60Hz 120Hz 240Hz

960ch 960ch 720ch

FHD (10bit)

60pin

(2ea)

FHD (10bit)

50 pin

(2ea)

80pin

(2ea)

70pin

(2ea)

What to change

LCM (T-con to S-Driver IC)

HF mini-LVDS

18

VCC

1

EPI

2

VCC

* Bandwidth Capability

- FHD 120Hz 10Bit : 594Mbps@36Lines → 1.65Gbps@12Lines

- FHD 240Hz 10Bit : 594Mbps@72Lines → 1.25Gbps@32Lines

1

TCON

18

(FHD 120Hz)

TCON

LOCK

(FHD 120Hz)

4/ 88

EPI Interface (mini-LVDS vs. EPI)

LGE Internal Use Only

HF mini-LVDS EPI

Topology

Protocol

Features

@10bit, FHD120

Merit

TCON

• Multi Drop

• Data rate: 660Mbps

• External clock

• Simple structure

• Standardization

TCON

2

1

• Point to Point

• Data rate : 1.8Gbps

• Embedded clock, Control

• Fewer Lines : 12

• Embedded clock

: low EMI, Clock skew free

Lock

Demerit

• Too many lines : 36

• Clock skew

• EMI due to clock lines

• Bandwidth limit

• Easy to PCB design

• Transmission Overhead

: 4bit delimiter

5/ 88

NFC (Near field communication)

LGE Internal Use Only

Near field communication (NFC) is a set of standards for smartphones and similar devices to establish radio communication with each other by touching them together or bringing them into close proximity, usually no more than a few centimetres. Present and anticipated applications include contactless transactions, data exchange, and simplified setup of more complex communications such as Wi-Fi. Communication is also possible between an NFC device and an unpowered NFC chip, called a "tag".

From Smart phone

to TV

User Action Area

Samrt phone close to

NFC Tag

Player choose

From TV

to Smart phone

6/ 88

Main PCB for Broadband

LGE Internal Use Only

xxLA660S-Zx

To PSU

3

5

Main + TCON all in one

1

Chassis : LD33B PCB P/No : EAX64797003

S

model

To module

6

WIFI/BT

Key+IR

2

Front Spk

4

2

Only S model

1

LNB IC Block

Main processor, DDR Memory

1

eMMC Memory

Micom for Key/IR sensing

2

1

2

3

4

5

6

PMIC

Audio AMP

EPI Wafer

Level shifter

7/ 88

1. LGE2122 Block Diagram

LGE Internal Use Only

Cable

R E A

DVB-S

R

(H)

MHL 1A SIL1392

MHL : I2C 4

Air/

T/C/S2 Without ATV

TUNER

(T/C/A)

TUNER

(S2)

DVB-S : I2C 4

MHL

DEMOD

(S2)

LNB

Tuner : I2C 6

USB1

S

(HDD)

I

USB2

D

USB3

E

HDMI1

S

I

HDMI2

D

HDMI3

E

H/P

AV/COMP

R

SCART

E A R

OPTIC

LAN

CI Slot

P_TS

IF (+/-)

P_TS

OCP

2.5A

OCP

1A

AMP

TI

P_TS

X_TAL 27MHz

T/C Demod

Analog Demod

P_TS

USB

HDMI

MUX

CVBS/YPbPr

CVBS/RGB

SPDIF OUT

ETHERNET

DDR3 1600 X 16

(512MB X 2EA)

LGE 2122

A B

I2C 5

I2C 1

LVDS

EPI

I2C 2

I2S Out

I2C 1

UART

KEY

USB_WIFI

DDR3 1600 X 16

(256MB X 1EA)

SYSTEM EEPROM

(256Kb)

HDCP EEPROM

(16Kb)

eMMC

(4GB)

51P 41P

50P 50P

IR

PM ICLEVEL

SHIFTER

Audio AMP

(NTP7513)

LOCAL DIMMING

BLUTOOTH

IR / NFC

KEY

WIFI

LOGO LIGHT

SUB

ASSY

I2C 3

Sub Micom

(RENESAS R5F1000G)

X_TAL

32.768KHz

2. LGE 2122 I2C Block Diagram

LGE Internal Use Only

IC3000

Renesas MICOM

IC7700

PMIC

IC8101

NTP7513(AMP)

3.3KΩ

+3.5V_ST

100Ω

+3.3V_Normal

2.7KΩ

33Ω

+3.3V_Normal

2.7KΩ

33Ω

+3.3V_Normal

1.2KΩ

33Ω

IC105

LGE 2122

I2C_SDA3

I2C_SCL3

I2C_SDA2

I2C_SCL2

I2C_SDA1

I2C_SCL1

I2C_SDA4

I2C_SCL4

I2C_SDA5

I2C_SCL5

+3.3V_Normal

2.7KΩ

33Ω

+3.3V_Normal

2.7KΩ

33Ω

+3.3V_Normal

2.7KΩ

33Ω

22Ω

33Ω

IC3304

MHL

LNB

TUNER(S)

IC100

NVRAM

P7600

Local dimming

IC101

HDCP EEPROM

33Ω

22Ω

I2C_SDA6

I2C_SCL6

33Ω

TUNER(D)

3. Power Block Diagram

(

)

y

(

)

L

)

A

(

)

Q)

T

)

LGE Internal Use Only

3.5V

12V

24V

MICOM(VDD) IR A'ssy

PANEL_VCC

PANEL_POWER

NTP_7400(PVDD1) NTP_7400(PVDD2)

AMP

+12V_LNB

LNB option

1.5V DDR

5V USB 3A

3A

1.23V 2A

MTK (DDRV) DDR(VDD) DDR(VDDQ)

TUNER(+1.23V)

5V Normal

3A

1.2V Core 6A

3.3V Noraml 4A

5V USB

1CH DCDC 4A 2CH OCP 1.2A

USB1(DVR Max 1.5A

HDMI_EEPROM RGB_EEPROM CI (+5V_CI_ON) TUNER(+5V_TU)

MTK(AVDD12_LVDS) MTK MTK(VCCK)

AVDD_

USB_WIFI

USB2(Max 1.2A)

USB3(Max 1.2A)

3.3V DAC

MTK(AVDD33_DAC)

SPDIF IR A'ss M_REMOTE HDCP EEPROM NVRAM

DVDD3V3

MTK MTK (AVDD33_AADC MTK (AVDD3V3 MTK(AVDD3V3_MEMPL MTK(AVDD3V3_LVDS MTK(AVDD33_STB

UDIO AMP

EARPHONE AMP

VCC

EMMC EMMC(VCC

UNER(+3.3V_TU)

1.8V_TU

4. Tuner/CI Block Diagram

LGE Internal Use Only

TDSQG501D

[+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

+3.3V_D_Demod

+3.3V_TU

+1.8_TU

+1.23V_D_Demod

LNB_TX

LNB_OUT

I2C_SCL4

+3.3V_NORMAL

3.3K Ω

22 Ω

10 [TONECTRL]

2 [LNB]

7 [SCL]

8 [SDA]

I2C_SDA4

[RESET] 2 AG24 [ADIN6_SRV]

[SLC] 3

[SDA] 4

[ERROR] 16

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

/TU_RESET1

IC2_SDA6 IC2_SCL6

FE_DEMOD1_TS_SYNC FE_DEMOD1_TS_VAL FE_DEMOD1_TS_CLK

33 Ω33Ω

FE_DEMOD1_TS_DATA [0-7]

[D0-7] 20-27

[S2_RESET] 31 AM18 [ADIN7_SRV]

[T/C_DIF[P]] 10

[T/C_DIF[N]] 11

IF_P

IF_N

/S2_RESET

Attenuator

TUNER_SIF(for T2/C/S)

ADCINP_DEMOD

ADCINN_DEMOD

AM27 [ADCINP_DEMOD]

AN27 [ADCINN_DEMOD]

TU_CVBS(for T2/C/S)

IF_AGC

A8303SESTR-TB

IC6900

LGE 2122

AP6 [S CL3] AR6 [S DA3]

AF19[OPCTRL1]

AJ19 [OPCTRL0]

R29 [DEMOD_TSSYNC] P27 [DEMOD_TSVAL] P30 [DEMOD_TSCLK]

[DEMOD_TSDATA0-7]

LNB

T34[DEMOD_RST]

P34[PVR_TSDATA1]

P33[PVR_TSDATA0]

R33[PVR_TSSYNC]

R35[CI_TSDATA0]

PCM_5V_CTL

CI 5V

Power detect

+5V_CI_ON

VCC

+5V_CI_ON +3.3V_NORMAL

F28[TCON12]

L33[SPI_CLK]

L30[SPI_CLK1]

M31[CI_TSCLK] CARD_EN1

N34[SPI_DATA]

N35[SPI_CLE]

[GPIO0-14]

[GPIO26-33]

N36[CI_INT]

R36[CI_TSVAL]

R37[CI_TSSYNC]

CI_ADDR[0-14] CI_A_ADDR[0-14]

CI_DATA[0-7] CI_A_DATA[0-7]

MTK5398_TS_CLK

R3[PVR_TSCLK]

[GPIO34-41] TS_OUT[0-7]

[GPIO18-25] TS_IN[0-7]

MTK5398_TS_VAL

MTK5398_TS_SYNC

MT5398_TS_IN[0-7] CI_TS_DATA[0-7]

MT5398_TS_OUT[0-7] CI_MDI[0-7]

10K Ω

/CI_CD1

/CI_CD2

CI_VS1

/PCM_CE1

/PCM_CE2

/PCM_IOWR

/PCM_IORD

PCM_RST

/PCM_WAIT

PCM_INPACK

/PCM_A_REG

/PCM_IRQA

/PCM_OE /PCM_WE

47 Ω

47K Ω

CI_TS_CLK

CI_TS_VAL

CI_TS_SYNC

CI_DET1

CI_DET2

VS1M27[PVR_TS_VAL]

CARD_EN2

IOWD

IORD

ADDR[0-14]

DAT[0-7]

CI_RESET

CI_WAIT

INPACK

REG

/IRQA

O_EN

WR_EN

TS_OUT_CLK

TS_OUT_VAL

TS_OUT_SYNC

CI Slot

5. Video/Audio In Block Diagram

LGE Internal Use Only

JK501

SCART

COMP1_Y/AV1_CVBS

COMP1_Pb

COMP1_Pr

COMP1/AV1/DVI_L_IN

COMP1/AV1/DVI_R_IN

SC_CVBS_IN

SC_ID/FB

SC_R/G/B

SC_L/R_IN

Jack Side

SoC Side

COMP1_Y/AV1_CVBS_SOC

COMP1_Pb_SOC

COMP1/AV1/DVI_L_IN_SOC

COMP1/AV1/DVI_R_IN_SOC

SC_CVBS_IN_SOC

SC_FB_SOC

SC_R/G/B_SOC

SC_L/R_IN_SOC

[CVBS2P]

[PB0P]

[PR0P]

[AIN4_L_AADC]

[AIN4_R_AADC]

LGE 2122

[CVBS3P]

[ADIN0_SRV, SOY1]

[PR1P, PB1P, Y1P]

[AIN1_L/R_AADC]

JK4600

Tuner

TU_CVBS

TUNER_SIF, IF_P/N

Parallel TS / ERROR,VAL,SYNC,CLK

TU_CVBS

TUNER_SIF, IF_P/N

Parallel TS / ERROR,VAL,SYNC,CLK

[CVBS1P]

[MPXP, ADCINP_DEMOD, ADCINN_DEMOD]

6. Audio Out Block Diagram

LGE Internal Use Only

COMP1/AV1/DVI_L_IN_SOC COMP1/AV1/DVI_R_IN_SOC

JK501

SCART

[AIN4_L_AADC] [AIN4_R_AADC]

[AL1_ADAC]

[AR1_ADAC]

SCART_L/Rout

IC6000

AZ4580MTR

OP AMP

Mute CTRL

(TR)

SCART_MUTE

LPF

SCART

DTV/MNT_L/R_OUT

JK4600

DVB only

JK4600

Tuner

SC_L_IN / SC_R_IN

DVB only

TR BUF

TUNER_SIF

[AIN1_L_AADC] [AIN1_R_AADC]

LGE 2122

[MPXP]

[AOMCLK]

[AOSDATA0]

[AOLRCK]

[AOBCK]

[STB_SDA]

[STB_SCL]

[OPCTRL4]

[AL0_ADAC]

[AR0_ADAC]

[ASPDIF0]

AUD_MASTER_CLK

AUD_LRCH

AUD_LRCK

AUD_SCK

I2C_SDA1 I2C_SCL1

AMP_RESET_N

HP_L/ROUT_MAIN

SPDIF_OUT

IC6100

TPA6138A2PWR

HP AMP

IC8101

Audio AMP

NTP7513

AMP_MUTE

IC3000

MICOM

SIDE_HP_MUTE

HP_L/ROUT_AMP

LPF

JK3700

JK3602

4P WAFER

SPEAKER_L

SPEAKER_R

WOOFER

HEAD PHONE

7. HDMI

LGE Internal Use Only

DDC_SCL_1_SOC

DDC_SDA_1_SOC

HDMI_ARC

TMDS Link 8bits

HDMI1

LGE 2122

DDC_SCL_2_JACK

DDC_SDA_2_JACK

TMDS Link 8bits

I2C_SCL4 I2C_SDA4

TMDS Link 8bits

SIL1292

5V_MHL

OCP

MHL_DET

DDC_SCL_3_JACK DDC_SDA_3_JACK

TMDS Link or MHL Link

5V_BUS

X-tal

32.768kHz

HDMI2

HDMI3

CEC_REMOTE

Q3001

HDMI_CEC

RENESAS

MICOM

WOL_CTL

8. Panel Interface Block Diagram

LGE Internal Use Only

PANEL_VCC

(+12V)

LGE 2122

EPI Tx

Block

VCC

VCC1.8

VDD

PMIC

H_VDD

TPS65178

VCOM_P

SWP

CTRLP

6

GMA4/GMA5/GAM7/GMA12/GMA14/ GMA15

2 2 2

SWN

CTRLN

EPI CH1 +/EPI CH2 +/EPI CH3 +/-

VCOM_DYN VCOMLFB

VCOM_N

TR/

Diode

TR/

Diode

VCOM_LOOP

VGH

VGL

VCOM

EO

GST

GCLK MCLK

Level Shift

TPS65198

2

VGL_I

GIP_RST

VST

CLK1_I~CLK6_I

2

6

50Pin X 2

6

GMA1/GMA3/GAM9/GMA10/GMA16/GMA18

VGH_EVEN/VGH_ODD

VGH_F/VGH_R

EPI_LOCK3

Z_Out

VCOMRFB

2 2 2

GMA4/GMA5/GAM7/GMA12/GMA14/GMA15

EPI CH4 +/EPI CH5 +/EPI CH6 +/-

EPI_LOCK6_SOURCE EPI_LOCK6

9. PMIC & Level Shift Bloc Diagram

LGE Internal Use Only

PANEL_VCC

Boost Converter

Buck 1 converter(VCC)

Buck 2 converter(Vcore)

Buck 3 converter(HVdd)

Buck 4 converter(VCC18)

Positive Charge Pump Controller

Negative Charge Pump Controller

6-Ch Gamma Buffer(DAC output)

Vcom reference & gain

Reset

Vdd

VCC

Vcore

HVdd

VCC18

SWN

CTRLN SWP

CTRLP

GAM4/5/7/12/14/15

VCOM_P VCOM_N

VCOM_LOOP PMIC_RESET

TR/

Diode

TR/

Diode

Level Shift

TPS65198

VGL

VGH

TPS65178

PMIC

10. USB / WIFI / M-REMOTE / UART

LGE Internal Use Only

[USB_DM_P2]

[USB_DP_P2]

[GPIO43] [GPIO46]

[USB_DM_P1]

[USB_DP_P1]

[GPIO42]

[TCON12]

[USB_DM_P0]

[USB_DP_P0]

[GPIO44]

[ADIN2_SRV]

[USB_DM_P3]

[USB_DP_P3]

[U1RX] [U1TX]

[ADIN4_SRV]

[OPCTRL49]

[OPCTRL50]

USB_DM1 USB_DP1

/USB_OCD1

USB_CTL1

USB_DM2

USB_DP2 /USB_OCD2 USB_CTL2

USB_DM3

USB_DP3 /USB_OCD3 USB_CTL3

WIFI_DM WIFI_DP

USB1

USB2

USB3

+5V_USB_1

+5V_USB_2

+5V_USB_3

M_REMOTE_RX M_REMOTE_TX

M_RFModule_RESET

RTS CTS

OCP

USB_WIFI

Motion Remote

Receiver

[U0TX]

[U0RX]

LGE 2122

SOC_TX SOC_RX

RENESAS MICOM

HDMI2

4Pin debugging

wafer

HDMI3

Interconnection - 1

LGE Internal Use Only

47LA660S-ZA

[PCBs]

3

2

3

4

1

5

2

6

1

2

3

4

5

Main PCB Power Board

Local key Assy RF Assy

WIFI Assy

[Cables]

1

Main / LPB 24Pin + Local Dimming Cable

Main / Module EPI Cable

2

50& 50Pin

LED driver / PSU

3

4

IR 8Pin Cable

4 5

1 / 88

5

WiFi 6Pin + RF 8Pin Cable

6

SPK Cable

Interconnection - 2

LGE Internal Use Only

47LA660S-ZA

[PCBs]

7

8

6

IR Assy

[Cables]

IR to Local Key 3Pin Cable

7

8

IR to Logo Assy 4Pin Cable

2 / 88

Introductions of 13Y RF ass’y + Magic Remote control

LGE Internal Use Only

1. System

2. Remote Buttons

3. MR13 Block Diagram

4. Function List

5. Pairing/Un-pairing Method

3 / 88

1. System

LGE Internal Use Only

RF

UART or USB

RF Receiver

Remote

 Pairing Information Transmission (Send to TV after Paired)

• Static Calibration Data (Bypass only)

• Remote FW ver. (Save also in Receiver)

• BD_ADDR (Save also in Receiver)

• Pairing Information Transmission Sequence

• When it is paired, the remote sends packets(pairing success, F/W version, BD_ADDR) to the receiver.

• The receiver sends the pairing success packet to TV directly.

• F/W version and BD_ADDR packets are just saved on the receiver.

• The receiver sends F/W version or BD_ADDR packet to TV when it is required.

 Motion Data Transmission

• Period : 7.5msec

• Motion Data : gyro, accelerometer

 Voice Data Transmission

• Period : 10msec

• Voice sampling : 16khz 16bit

TV

4 / 88

2. Remote Buttons (M4 vs. MR13)

LGE Internal Use Only

POWER

BACK HOME

↑

OK

← →

BACK SMART

POWER

↑

OK

← →

↓

VOICE

↓

Screen RMT

Q.MENU

MUTE

VOL CH

3D MYAPPS

3D

VOL CH

M4 Remote MR13 Remote

Phsical

Buttons

Logical

Buttons

BUTTON

POWER 0x08 NONE Y IR only BACK 0x28 0x8028 Y SMART 0x7C 0x807C Y

← 0x07 0x8007 Y → 0x06 0x8006 Y ↑ 0x40 0x8040 Y ↓ 0x41 0x8041 Y

OK 0x75 0x8044 Y VOICE 0xDE 0x808B Y = VOICE_START 3D 0xDC 0x80DC Y

Screen RMT / Q.MENU

CH + 0x00 0x8000 Y CH - 0x01 0x8001 Y VOL + 0x02 0x8002 Y VOL - 0x03 0x8003 Y MUTE 0x09 0x8009 Y AUTO_WAKEUP X 0x800C VOICE_START X 0x800A VOICE_STOP X 0x800D POINT_START X 0x803E POINT_STOP X 0x803F

RF Unpaired

IR_CODE

0xDE

RF Paired

RF_CODE

0x80DE

IR continuous

repeat

Y

ETC.

5 / 88

3. MR13 Block Diagram

LGE Internal Use Only

MPU-6150

(Gyro+ACC)

(Invensense)

512Kb

(Serial F/M)

Key Button

( 4 x 4 )

Antenna

Partron

X-tal

24 MHz

Wheel

Encoder

I2C ch1

BCM20733M A2

(BROADCOM)

Bluetooth 3.0

Power Management

I2S

I2C ch2

IR Emitter1

IR Emitter2 (Voice Scene IR)

Voice

WM8950

(Wolfson)

Codec(ADC )

MIC.

(Knowles)

4-mode Only

Antenna

BCM20702M

(BROADCOM) Bluetooth 4.0

SPI

512Kbit (Serial Flash)

X-tal 20 MHz

UART

AA x 2 Battery

DC-DC Boost

TI TPS61097

SOT23-5

2.8V LDO

uP0108NEC5-28

SC70

2.8V LDO

uP0108NEC5-28

Bluetooth Remote control

SC70

Connector

Bluetooth Receiver

6 / 88

4. Function list

LGE Internal Use Only

Remocon

주요 Item

IC Manufacturer Function

Voice Codec WM8950 Wolfson 16KHz Sampling of Audio data

Voice

MEMS Mic. SPU0414HR5H Knowles Sensing Voice

Motion

Sensor

Gyro Sensor

+

Accelerometer

MPU-6150 Invensense

Sensing angular velocity of X, Y, Z-axis

Sensing device tilt (Pitch & Roll angle)

RF Antenna SDBTPTR3015 Partron

RF

+

X-tal 24MHz Partron

Wireless communication

Micom

RF + Micom BCM20733A2 Broadcom

DC-DC Converter TPS61097 TI Battery Boost up Regulator

LDO1 uP0108NEC5-28 uPI RF, Gyro, Accelerometer Power Supply

LDO2 uP0108NEC5-28 uPI Audio Codec, Mic. Power Supply

7 / 88

5. RF Pairing / Un-pairing Method

LGE Internal Use Only

Method Description

• When do pairing, the remote

should make pairing request IR signal(0x75) to TV.

RF Pairing

RF Unpairing

 Method1

– If unpaired, just press "OK" button. – If paired, press "OK" button after

unpairing.

 Method 2 (Repairing)

– Press “BACK" button for 5 sec.

Press “BACK" button and “SMART" button

at the same time for 5 sec.

• When TV receive the IR signal, it should send "pairing request packet" to the RF receiver.

• After pairing success, the remote should blink LED for some time and TV send "pairing success packet" back to TV.

• When remote try to unpairing, it doesn’t care about state of

receiver(stand alone).

• When remote try to unpairing, it doesn’t care about state of

receiver(stand alone).

• After unpairing, all pairing information should be erased.

• After unpairing, LED should be

blinked for 3sec.

• The remote just becomes to IR mode.

8 / 88

Introductions of 13Y WIFI built in ass’y

LGE Internal Use Only

1. Wi-Fi built in Ass’y feature

2. Wi-Fi built in Ass’y specification

9 / 88

WIFI Built in ass’y feature

LGE Internal Use Only

Block diagram

30

48

3.3V

Wafer

6pin 1.25mm

USB

DP, DN

GND

WOL

3.3V 1.2V

DCDC

EUP3010

- Pin map

USB

DP, DN

Crystal 20MHz

3.3V 1.2V

BCM43236B

RX/TX

Switch

DM3030

Switch

DM3030

10 / 88

Antenna

2.4G/5G

Antenna

2.4G/5G

PIN USB interface

1 Vcc

2 DM

3 DP

4 GND

5 WOW

6 NC

WIFI Built in ass’y Specification

LGE Internal Use Only

11 / 88

Widevine & HDCP 2.0 & NETFLX

LGE Internal Use Only

Contents

표지

1. Widevine?

2. HDCP 2.0 & NETFLIX?

3. DTCP?

4. Changed BOM

2012. 12. 08

LCD TV

LCD TV R&D Lab / HW1 team

12 / 88

1. Widevine?

LGE Internal Use Only

[Widevine]

Widevine is the Solution(Library) offering Adaptive Streaming and DRM. In BBTV, when special CP do service, this module is required key. Currently CP which is requested to widevine, is typically Australian Bigpond Live and North American CinemaNow. Furthermore, because the future will be the spread of CP, widevine key download for the global model should be applied to production. (Because operation unique key should be downloaded for Widevine , Widevine key

dowmload by NSU is impossible.)

[Widevine Key]

Widevine Key is unique data stored TV for using Widevine.

13 / 88

2. HDCP 2.0 & NETFLIX?

LGE Internal Use Only

 HDCP

 High-bandwidth Digital Content Protection

 Protect high-value digital motion pictures, television programs and audio

against unauthorized interception and copying between a digital set top box or digital video recorder and a digital TV or PC.

 Specification developed by Intel Corporation to protect digital entertainment

across the DVI/HDMI interface.

 Why HDCP2.0?

 HDCP revision 2.0 supports a broader range of wired and wireless interfaces.

 Netflix

 the services maintain a huge selection of movies and latest releases and offer

DVD rentals via mail & online streaming.

14 / 88

3. DTCP?

LGE Internal Use Only

[DTCP]

The Digital Transmission Content Protection Specification defines a cryptogrphic protocol for protecting audio/video entertainment content from unauthorized copying, intercepting, and tampering as it traverses digital transmission mechanisms such as a high-performance serial bus that conforms to the IEEE 1394-1995 standard. Only legitimate entertainment content delivered to a source device via another approved copy protection system (such as the DVD Content Scrambling System) will be protected by this protection system.

[Three cryptographic Keys]

• Authentication Key which is formed as a result of authentication and used to protect the exchange keys.

•Exchage Key which is used to set up and protect content streams.

•Content Key which is used to encrpt the content being exchanged.

15 / 88

4. Changed BOM

LGE Internal Use Only

As-Was Current

Changed Item

: Separate HDCP check box.

- HDCP 2.0 Tx

- HDCP 2.0 Rx

- HDCP 1.4 Rx

16 / 88

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 Video error, video lag/stop, fail tunning 3, 4

4 Color error 5

5

6

7

8

9 Wrecked audio/discontinuation/noise 10

10

A. Video error

B. Power error

C. Audio error

D. Function error

No video/Normal audio 1

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

No power 7

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

No audio/Normal video 9

No response in remote controller, key error, recording error, memory error

6

8

11

11 External device recognition error 12

12 E. Noise Circuit noise, mechanical noise 13

13 F. Exterior error Exterior defect 14

14 G. Network error Connection defect / Network speed low 15

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

17 / 88

Contents of LCD TV Standard Repair Process Detail Technical Manual

LGE Internal Use Only

No. Error symptom Content Page Remarks

1

2 LED driver B+ 24V measuring method A2

A. Video error_ No video/Normal audio

3 Check White Balance value A3

4 Power Board voltage measuring method A4

6

A. Video error_ No video/Video lag/stop

7 LCD-TV Version checking method A7

9

10 Tuner Checking Part A9

A. Video error_Color error

11

12 Adjustment Test pattern - ADJ Key A12

13

14

15 Adjustment Test pattern - ADJ Key A12

A. Video error_Vertical/Horizontal bar, residual image, light spot

Check LCD back light with naked eye A1

TUNER input signal strength checking method A6

LCD TV connection diagram A8

Check Link Cable (LVDS) reconnection condition

LCD TV connection diagram A8

Check Link Cable (LVDS) reconnection condition

A10 A11

A10 : 32/37/42/47/55 A11 : 32 AUO

16

17 Exchange T-Con Board (2) A-2/5

18 Exchange LED driver Board (PSU) A-3/5

19 Exchange Module itself (1) A-4/5

20 Exchange Module itself (2) A-5/5

Defected Type caused by T-Con/ Inverter/ Module

Exchange T-Con Board (1) A-1/5

18 / 88

Continue to the next page

55” : driver board Other : PSU

Standard Repair Process

LGE Internal Use Only

Established

date

Revised date

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, LVDS Cable,Speaker Cable,IR B/D Cable,,,)

☞A4 ☞A1

N

Y

Check Back Light On with naked eye

☞A2

Check Power Board 24v output

On

Normal voltage

N

Repair Power Board or parts

Y N Check Power Board

12v,3.5v etc.

Replace Inverter

Y

or module

Normal

voltage

Repair Power Board or parts

End

Y

N

No video Normal audio

Normal

audio

Move to No video/No audio

2012. 12 .06

Replace T-con Board or module And Adjust VCOM

☞A28

※Precaution

Always check & record S/W Version and White

Balance value before replacing the Main Board

☞A7 & A3

Replace Main Board

19 / 88

Re-enter White Balance value

Standard Repair Process

LGE Internal Use Only

LCD TV

symptom

No Video/ No audio

Error

A. Video error

No video/ No audio

☞A4

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

Normal

voltage?

N

Replace Power Board and repair parts

Y

Check and replace MAIN B/D

Established

date

Revised date

End

2012. 12 .06

20 / 88

Standard Repair Process

LGE Internal Use Only

LCD TV

☞ A6

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. Picture Problem

Picture broken/ Freezing

. By using Digital signal level meter

. By using Diagnostics menu on OSD

( Menu→ Set up→ Support → Signal Test )

- 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`

☞ A7

Normal

Picture?

N

Contact with signal distributor

or broadcaster (Cable or Air)

Y

Check

S/W Version

SVC

Bulletin?

Y

S/W Upgrade

Normal

Picture?

Y

Established

date

Revised date

N

Use Signal Test

Check Signal status

N

2012. 12 .06

Normal

Picture?

Check

Tuner soldering

Replace

Main B/D

Y

Close

N

Close

21 / 88

Standard Repair Process

LGE Internal Use Only

LCD TV

☞ A6

Check RF Signal level

Normal

Signal?

Contact with

signal distributor

or broadcaster

(Cable or Air)

Y

N

Error

symptom

A. Picture Problem (DVB-S/S2)

Check RF signal cable (DVB satellite signal or not)

Check whether other equipments have problem or not.

(By connecting RF Cable at other equipment) → Set-Top-Box, Different maker TV etc

Check satellite setting.

- Check LNB frequency.

- Check satellite

- Check Satellite connection

(DiSEqC, motor, etc…)

Tuning fail, Picture broken/ Freezing

☞ A7

Normal

setting?

N

Change satellite setting

(match with installed ANT)

Y

Check

S/W Version

Established

date

Revised date

SVC

Bulletin?

Y

S/W Upgrade

Normal

Picture?

N

2012. 12 .06

N

Check

Tuner soldering

Replace

Main B/D

Close

Normal

Picture?

Y

Close

Y

N

Close

22 / 88

Standard Repair Process

LGE Internal Use Only

LCD TV

☞A8

Check color by input

-External Input

-COMPONENT

-RGB

-HDMI/DVI

☞A12

Check Test pattern

Error

symptom

Color

error?

Check error color input mode

Y

N

External Input/

A. Video error

☞ A10/ A11

※ Check and

replace Link Cable (LVDS) and contact condition

Component

error

Color error

Color

error?

N

Check external device and cable

Y

Replace Main B/D

Established

date

Revised date

External device

/Cable

normal

N

Color

error?

End

Y

2012. 12 .06

Y

Replace module

N

Replace Main B/D

RGB/

HDMI/DVI

error

Check external device and cable

23 / 88

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

☞A8

Check color condition by input

-External Input

-Component

-RGB

-HDMI/DVI

☞A12

Check Test pattern

Screen

normal?

N

Replace module

Check external

Y

device connection condition

Normal?

Request repair for external device

External device screen error-Color error

Check screen

condition by input

Check S/W Version

Check

version

Y

S/W Upgrade

Normal

screen?

Y

End

N

-External Input

-Component

-RGB

-HDMI/DVI

N

☞ A10/ A11

Check and

Y

replace Link Cable

External

Input error

Component

error

RGB

error

HDMI/

DVI

Established

date

Revised date

☞ A28

Y

N

Replace Main B/D (adjust VCOM)

Replace Main B/D

Screen

normal?

End

For other panel

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.

2012. 12 .06

For LGD panel

Screen

normal?

Request repair for external device

Screen

normal?

Y

N

Replace Module

N

Screen

normal?

Y

End

Replace Main B/D

24 / 88

Standard Repair Process

LGE Internal Use Only

LCD TV

☞A17

Check Power LED

. Stand-By: Red . Operating: white

Error

symptom

Power LED

On?

N

Check Power cord was inserted properly

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

2012. 12 .06

Revised date

☞A19

Y

N

Check Power

On ‘”High”

Replace Main B/D

Normal

operation?

☞A4

Measure voltage of each output of Power B/D

N

Y

Replace Main B/D

Normal

voltage?

Replace Power B/D

OK?

Y

Replace Power B/D

25 / 88

Standard Repair Process

LGE Internal Use Only

LCD TV

Check outlet

Check A/C cord

Check for all 3- phase power out

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

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

☞A22

N

Check Power Off Mode

☞A19

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

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

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_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 "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

Established

date

Revised date

CPU

Abnormal

1

Normal

voltage?

N

Replace Power B/D

2012. 12 .06

Replace Main B/D

Y

Replace Main B/D

Normal?

Replace Power B/D

Y

N

End

26 / 88

Standard Repair Process

LGE Internal Use Only

LCD TV

No audio Screen normal

Error

C. Audio error

symptom

No audio/ Normal video

☞A24 ☞A25

Check user menu > Speaker off

Off

Y

Cancel OFF

Check audio B+ 24V

N

of Power Board

Established

date

Revised date

Normal voltage

Replace Power Board and repair parts

Y

N

2012. 12 .06

Check Speaker disconnection

Disconnection

Y

Replace Speaker

27 / 88

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

2012. 12 .06

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

☞A25

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

Check audio B+ Voltage (24V)

Normal

voltage?

N

Replace Power B/D

Replace Main B/D

Normal

audio?

Y

N

Y

End

Check and fix external device

28 / 88

Standard Repair Process

LGE Internal Use Only

D. General Function Problem

Remote control & Local switch checking

LCD TV

Error

symptom

1. Remote control(R/C) operating error

☞A27

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.

Normal

operating?

N

Check & Replace

Baterry of R/C

operating?

Replace R/C

Y

Normal

Check & Repair Cable connection Connector solder

Close

N

Normal

operating?

Y

Close

☞A27

N

Check B+ 3.5V

On Main B/D

Established

date

Revised date

☞A27

Normal

Voltage?

Y

Output signal

N

☞A4

Check 3.5v on Power B/D

Replace Power B/D or

Replace Main B/D

(Power B/D don’t have problem)

2012. 12 .06

Check IR

Replace

Main B/D

Normal

Signal?

N

Repair/Replace

IR B/D

Y

29 / 88

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?

accordance

with technical

information

Fix in

Y

External Input and

N

Component

Recognition error

RGB,HDMI/

DVI, Optical

Recognition error

Established

date

Revised date

2012. 12 .06

Replace Main B/D

30 / 88

Standard Repair Process

LGE Internal Use Only

LCD TV

Identify noise type

Error

symptom

Circuit

noise

Mechanical

noise

Circuit noise, mechanical noise

Check location of noise

E. 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.

OR

Replace PSU(with LED driver)

Replace LED driver

※ When the nose is severe, replace the module

OR

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

※ If there is a “Tak Tak” noise from the cabinet, refer to the KMS fix information and then proceed

OR

as shown in the solution manual (For models without any fix information, provide the description)

Established

date

Revised date

2012. 12 .06

31 / 88

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

Adjust VCOM

☞A28

2012. 12 .06

Stand

dent

Replace stand

32 / 88

Standard Repair Process

LGE Internal Use Only

LCD TV

Check Network status

Normal

Signal?

Check connection

with AP or internet

(WiFi = AP)

(Wired = ethernet

port)

Close

Y

N

Error

symptom

Check Wired ethernet cable connection Check whether AP has a probelm or not.

Setting  Network  Networ Status

Check Network connection Case1 WiFi .

- Check AP status Case2 Wired

- Check ethernet Port

G. Network Error

Exterior defect

Normal

setting?

N

Try to new network connection

(match with AP and ether setting)

Normal

Picture?

Y

N

☞ A7

Check

S/W Version

Established

date

Revised date

SVC

Bulletin?

Y

S/W Upgrade

Normal

Picture?

Y

Close

2012. 12 .06

N

Check

Wired, Wifi status

(Cable / sub Assy)

Replace

Main B/D

Close

33 / 88

Standard Repair Process

LGE Internal Use Only

LCD TV

Check CI CAM status

Read

Information?

Check damage of CI slot pin

Or damage of CI CAM

Y

N

symptom

Check status of CI+ Key in the In-start menu

Error

G. CI+ Competibility Error

Exterior defect

Check defect CI slot pin Check it’s worked CI+ 1.2 or 1.3 Setting  Antenna  CI information

Is there

CI+ key?

N

Replace

Main B/D

Or

Download

CI+ Key

Y

Check

CAM S/W

Version

Established

date

Revised date

SVC

Bulletin?

Y

CAM S/W Upgrade

By OTA

N

Normal

Picture?

Y

2012. 12 .06

N

Check

Wired, Wifi status

(Cable / sub Assy)

Replace

Main B/D

Close

Old version of CI+ 1.2 CAM is not worked at the TV that is supported CI+ 1.3

 Check SVC Bulletin

Close

34 / 88

Contents of LCD TV Standard Repair Process Detail Technical Manual

LGE Internal Use Only

Continued from previous page

No. Error symptom Content Page Remarks

21

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

23 Checking method when power is ON A19

24 POWER BOARD voltage measuring method A5

25

26

27

28

29

30

31

B. Power error_No power

B. Power error_Off when on, off while viewing

C. Audio error_No audio/Normal video

C. Audio error_Wrecked

audio/discontinuation

D. Function error_ No response in remote controller, key error

Check front display LED A17

POWER OFF MODE checking method A22

POWER BOARD PIN voltage checking method A19

Checking method in menu when there is no audio

Voltage and speaker checking method when there is no audio

Voltage and speaker checking method in

case of audio error

Remote controller operation checking method A27

A24

A25

32 D. VCOM Adjustment Sequence of the Vcom adjustment A28

35 / 88

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

2012. 12 .06 A4

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 10.

3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), re-

3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm), reenter the value after replacing the MAIN BOARD.

enter the value after replacing the MAIN BOARD.

36 / 88

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

A. Video error_No video/ Audio

Power Board voltage measuring method

Established

date

Revised

date

2012. 12 .06

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

24 Pin (Power Board ↔ Main Board)

SMAW200-H24S

A5

1

3

5

7

9

11 GND 12 GND

13 12V 14 12V

15 12V 16

17 GND 18 GND

19 GND 20 GND

21 GND 22

23 L/DIM0_MOSI 24 L/DIM0_SCLK

Power on

3.5V

GND

24V

2

4

6

8

10

Inverter On/off

PWM Dim #1

PWM Dim #2

GND

24V

L/DIMO_VS

37 / 88

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

2012. 12 .06

MENU  support  signal test  select channel

A6

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

38 / 88

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

A. Video error_Video error, video lag/stop

LCD-TV Version checking method

Established

date

Revised

date

2012. 12 .06 A7

1. Checking method for remote controller for adjustment

Version

Press the IN-START with the remote controller for adjustment

39 / 88

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

2012. 12 .06

A8

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

40 / 88

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

2012. 12 .06 A9

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.

41 / 88

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

2012. 12 .06

A12

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!)

42 / 88

Appendix : Exchange EPI Cable or Main B/D (1)

LGE Internal Use Only

Solder defect, CNT Broken

T-Con Defect, CNT Broken

Solder defect, CNT Broken

T-Con Defect, CNT Broken

Solder defect, CNT Broken

Abnormal Power Section

Solder defect, Short/Crack

Abnormal Power Section Solder defect, Short/Crack

43 / 88

Appendix : Exchange EPI Cable or Main B/D (2)

LGE Internal Use Only

Abnormal Power Section

Solder defect, Short/Crack

Abnormal Power Section

Fuse Open, Abnormal power section

Solder defect, Short/Crack

Abnormal Display

GRADATION

Noise

44 / 88

GRADATION

Appendix : Exchange LPB(LED driver)

LGE Internal Use Only

No Light

Dim Light

45 / 88

Appendix : Exchange the Module (1)

LGE Internal Use Only

Panel Mura, Light leakage

Crosstalk

Panel Mura, Light leakage

Press damage

Crosstalk

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

Press damage

46 / 88

Appendix : Exchange the Module (2)

LGE Internal Use Only

Vertical Block

Source TAB IC Defect

Horizontal Block

Gate TAB IC Defect

Horizontal Block

Gate TAB IC Defect

Vertical Line

Source TAB IC Defect

Horizontal Block

Gate TAB IC Defect

Vertical Block

Source TAB IC Defect

Horizontal line

Gate TAB IC Defect

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

47 / 88

Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

B. Power error _No power

Check front display LED

Established

date

Revised

date

2012. 12 .06

A17

You can set the LG Logo Light

to on or off by selecting OPTION

in the main menus.

Front LOGO LED control in the status of

ST-BY Condition:

Menu  Option  LG Logo Light  Brightness(OFF,LOW,MIDDLE,HIGH)

LOGO LED

Front LOGO LED control in the status of

Power On Condition:

Menu  Option  LG Logo Light  Duration(off, off after10min)

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Standard Repair Process Detail Technical Manual

LGE Internal Use Only

Error

LCD TV

symptom

Content

For ’10 models, there is no voltage out for st-by purpose. When st-by, only 3.5V is normally on.

B. Power error _No power

Check power input voltage and ST-BY 3.5V

Established

date

Revised

date

2012. 12 .06

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

24 Pin (Power Board ↔ Main Board)

SMAW200-H24S

A18

1

3

5

7

9

11 GND 12 GND

13 12V 14 12V

15 12V 16

17 GND 18 GND

19 GND 20 GND

21 GND 22

23 L/DIM0_MOSI 24 L/DIM0_SCLK

Power on

3.5V

GND

24V

2

4

6

8

10

Inverter On/off

PWM Dim #1

PWM Dim #2

GND

24V

L/DIMO_VS

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Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

B. Power error _No power

Checking method when power is ON

Established

date

Revised

date

2012. 12 .06

Check “power on” pin is high

24 Pin (Power Board ↔ Main Board)

SMAW200-H24S

A19

1

3

5

7

9

11 GND 12 GND

13 12V 14 12V

15 12V 16

17 GND 18 GND

19 GND 20 GND

21 GND 22

23 L/DIM0_MOSI 24 L/DIM0_SCLK

Power on

3.5V

GND

24V

2

4

6

8

10

Inverter On/off

PWM Dim #1

PWM Dim #2

GND

24V

L/DIMO_VS

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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

2012. 12 .06

A22

Entry method

1. Press the IN-START button of the remote controller for adjustment

2. Check the entry into adjustment item 3

51 / 88

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

2012. 12 .06

A24

Checking method

1. Press the MENU button on the remote controller

2. Select the SOUND function of the Menu

3. Change TV Sound Out to TV Speaker

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Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

C. Audio error_No audio/Normal video

Voltage and speaker checking method when there is no audio

24 Pin (Power Board ↔ Main Board)

Established

date

Revised

date

2012. 12 .06

A25

1

3

5

7

②

9

11 GND 12 GND

13 12V 14 12V

15 12V 16

17 GND 18 GND

19 GND 20 GND

21 GND 22

23 L/DIM0_MOSI 24 L/DIM0_SCLK

Checking order when there is no audio

Power on

3.5V

GND

24V

SMAW200-H24S

2

4

6

8

10

①

Inverter On/off

PWM Dim #1

PWM Dim #2

GND

24V

③

L/DIMO_VS

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.

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Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

D. Function error_ No response in remote controller,

key error

Remote controller operation checking method

Established

date

Revised

date

2012. 12 .06

1 2 3

③

④

4 5 6 7 IR 8 GND

A27

P4101

GND KEY1 KEY2

+3.5V_ST

GND

LOGO/LED_R

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

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

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.

②

①

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Standard Repair Process Detail Technical Manual

LGE Internal Use Only

LCD TV

Error

symptom

Content

D. VCOM Adjustment

Sequence of the Vcom adjustment

1. Case

■ LCD module change

■ T-Con board change

2. Equipment

■ Service Remote controller

3. Adjust sequence

■ Press the ‘adj’ key

■ select V-COM

■ As pushing the right or the left button on the remote controller, And find the V-COM value Which is no or minimized the Flicker.

(If there is no flicker at default value, Press the exit key and finish the VCOM adjustment.)

■ Push the OK key to store the value. Then the message “Saving OK” is pop.

■ Press the exit key to finish V-COM adjustment.

Established

date

Revised

date

2012. 12 .06 A28

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LG XXLA74-Z, XXLA71-Z, XXLA69/66-Z, XXLA64/62/61-Z, XXLN57*-Z Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual