LG T-CON Schematic

P a g e | 1

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 2

CONTENTS

How to use this guide? ……………………………………………………….
These Models of LG TV T-con section is built-in Mainboard:

1) LG 42LE5500 ……………. ………………………………………….

2) LG 47LE5500 …………………………………………………………

3) LG 47LM7600 ………………………………………………………...

4) LG 50LB6500 …………………………………………………………

5) LG 55LA8600 …………………………………………………………

6) LG 55LB7200 …………………………………………………………

7) LG 55LM6700 ………………………………………………………...

T-con Board & Panel Part Numbers:

1) 32LH30 Interconnect …………………………………………………...

T-con Board P/N: 6870C-0230A (Similar to 6870C-0266A, LC320WUN)
DESC or Panel Sticker Number: LC320WUN-SAB1

2) 37LH55 Interconnect …………………………………………………..

T-con Board P/N: 6870C-0264B
DESC or Panel Sticker Number: LC370WUD-SBM1

3) 42LB5800 Interconnect ………………………………………………..

T-con Board P/N: 6870C-0480A
DESC or Panel Sticker Number: V14 42 DRD 60Hz Control_Ver0.3

4) 42LG70 Interconnect …………………………………………………..

T-con Board P/N: 6870C-0202B
DESC or Panel Sticker Number: LC420WUF-SAA1

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 3

5) 42LH20 Interconnect ………………………………………………….

T-con Board P/N: 6870C-0240C
DESC or Panel Sticker Number: LC-420WXN/LC370WXN (or LC420WXE-

SBA1)

6) 42LH50 Interconnect ………………………………………………….

T-con Board P/N: 6870C-4100D
DESC or Panel Sticker Number: LC420/470WUF-SBM1_SBL

7) 42LH90 Interconnect ………………………………………………….

T-con Board P/N: 6870C-4000H
DESC or Panel Sticker Number: LC320/420/470/550WU_120Hz Control

(LC420WUL-SBM1)

8) 42LK520 Interconnect …………………………………………………

T-con Board P/N: 6870C-0310C
DESC or Panel Sticker Number: LC420WUN-SCA1 (or similar LC420WUN-

SCB1, LC-420WUE-SCA2, LC420WUE-SCV1)

9) 42LN5300 Interconnect ………………………………………………

T-con Board P/N: 6870C-0452A
DESC or Panel Sticker Number: LC420DUE-SFR5, LC420DUE-SFR1 (similar to

LC500DUE-SFR1)

10) 42LV5500 Interconnect ………………………………………...

T-con Board P/N: 6870C-0358A
DESC or Panel Sticker Number: LC420EUF-SDA1 (V6 32/42/47 FHD 120Hz)

11) 42SL80 Interconnect ……………………………………………

T-con Board P/N: 6870C-0259A

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 4

DESC or Panel Sticker Number: LC420WUD-SBM4 (42/47 Slim & Narrow
240Hz CONTROL)

12) 47GA6400 Interconnect …………………………………………

T-con Board P/N: 6870C-0444A
DESC or Panel Sticker Number: LC470EUN-SFF2 (DESC: LC470DUE-SFR1)

13) 47LB6000 Interconnect ………………………………………….

T-con Board P/N: 6870C-0481A
DESC or Panel Sticker Number: V14 60Hz 1GID

14) 47LG90 Interconnect ……………………………………………

T-con Board P/N: 6870C-0188B
DESC or Panel Sticker Number: LC470WUL-SAA1-731

15) 47LH85 Interconnect ……………………………………………

T-con Board P/N: 6870C-4000H
DESC or Panel Sticker Number: LC470WUF-SBB1 (DESC:

LC320/420/470/550WU_120Hz CONTROL)

16) 47LN5750 Interconnect …………………………………………

T-con Board P/N: 6870C-0444A
DESC or Panel Sticker Number: LC470DUE-SFU1 (DESC: LC470DUE-SFR1)

17) 47LW5600 Interconnect …………………………………………

T-con Board P/N: 6870C-0358A
DESC or Panel Sticker Number: LC470EUF-SDF2 (DESC: V6 32/42/47 FHD

120Hz)

18) 47LX6500 Interconnect …………………………………………

T-con Board P/N: EAX62110705 (0)

http://www.LCDRepairGuide.com/screen-repair-v2/

DESC or Panel Sticker Number: LC470EUS-SCA1

19) 47LX9500 Interconnect ………………………………………..

T-con Board P/N: EAX61764003(3)
DESC or Panel Sticker Number: LX95M47T480V5 (DESC: LA02M)

20) 55EA9800 Interconnect ………………………………………..

T-con Board P/N: 6870C-0468B
DESC or Panel Sticker Number: LC550LUD-MFP2-L31

21) 55GA6400 Interconnect ………………………………………

T-con Board P/N: 6870C-0444A

P a g e | 5

DESC or Panel Sticker Number: LC470DUE-SFR1

22) 55LA9700 Interconnect ………………………………………

T-con Board P/N: 6870C-0467A
DESC or Panel Sticker Number: LC550EQD

23) 55LM6200 Interconnect ………………………………………

T-con Board P/N: 6870C-0401B
DESC or Panel Sticker Number: LC550EUE-SEF1 (DESC: 32/37/42/47/55 FHD

TM120)

24) 55LM8600 Interconnect ………………………………………

T-con Board P/N: EAX64583702-1.0
DESC or Panel Sticker Number: LC550EUH-PEF1

25) 55LW5700 Interconnect ………………………………………

T-con Board P/N: 6870C-0369B
DESC or Panel Sticker Number: LC550EUF-SDF1 (DESC: V6 55 FHD 120Hz)

http://www.LCDRepairGuide.com/screen-repair-v2/

26) 55LX6500 Interconnect ……………………………………….

T-con Board P/N: EAX62110705(0)
DESC or Panel Sticker Number: LC550EUC-SCA1

27) 79UB9800 Interconnect ………………………………………

T-con Board P/N: 6870C-0541B
DESC or Panel Sticker Number: (DESC: 79 UHD Curved Control)

P a g e | 6

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 7

P a g e | 8

How to Use this Guide?

1) This guide will help the repairer easy to see and find the testing points of

their T-con board. You can also easy to learn what’s commonly testing
points and voltages values in LG T-con board.

2) With this guide, you can see the T-con board small fonts easily with the help

of PDF viewer ZOOM IN feature.

3) Not only that, you also can compare each T-con board has difference circuit

design and signal control lines. So from this guide, you can easily to find out
what’s difference in each T-con board easily.

4) Attention: All the testing voltage values and waveform are based on their

LG Interconnect TV Models.

5) From this guide, you can also find out some of the T-con board just one part

number but can use in different sizes of LCD/LED Panel. But the different is
their firmware inside the T-con board only! (Some maybe need to change
some resistor/s (ohm values or the position/location) setting on the board to
match the panel and causing it working properly.

http://www.LCDRepairGuide.com/screen-repair-v2/

These Models of LG TV T-con section is

built-in Mainboard

1) 42LE5500 Interconnect

Panel P/N:
Mainboard P/N: EBU60904603

P a g e | 9

http://www.LCDRepairGuide.com/screen-repair-v2/

42LE5500 Mainboard (Front Side)

P a g e | 10

http://www.LCDRepairGuide.com/screen-repair-v2/

42LE5500 Mainboard (Back Side)

P a g e | 11

http://www.LCDRepairGuide.com/screen-repair-v2/

2) 47LE5500 Interconnect

Panel P/N:
Mainboard P/N: EBU60904603

P a g e | 12

http://www.LCDRepairGuide.com/screen-repair-v2/

47LE5500 Mainboard (Front Side)

P a g e | 13

http://www.LCDRepairGuide.com/screen-repair-v2/

47LE5500 Mainboard (Back Side)

P a g e | 14

http://www.LCDRepairGuide.com/screen-repair-v2/

3) 47LM7600 Interconnect

Panel P/N: EAJ62128701
Mainboard P/N: EAY62512702, EBU61749102

P a g e | 15

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 16

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 17

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 18

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 19

http://www.LCDRepairGuide.com/screen-repair-v2/

4) 50LB6500 Interconnect

Panel P/N: EAJ62548101, EAJ62630101
Mainboard P/N: EBT62974906, EBT62997605

P a g e | 20

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 21

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 22

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 23

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 24

5) 55LA8600 Interconnect

Panel P/N: EAJ62270501
Mainboard P/N: EBT62510502, EBT62510501, EBT62510504, EBR76363001

.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 25

LG 55LA8600 LVDS P7702 and P7703 Video Waveforms

SMTPE Color Bar input signal (Component). All signals taken at 2.5uSec per/sec/
100mV per/div.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 26

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 27

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 28

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 29

http://www.LCDRepairGuide.com/screen-repair-v2/

6) 55LB7200 Interconnect

Panel P/N: EAJ62270501
Mainboard P/N: EBT62902502, EBR78753301

P a g e | 30

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 31

http://www.LCDRepairGuide.com/screen-repair-v2/

LG 55LB7200 Mainboardd (+12V) Voltage Rating

P a g e | 32

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 33

http://www.LCDRepairGuide.com/screen-repair-v2/

7) 55LM6700 Interconnect

Panel P/N: AFB73410002, EAJ62109301, EAJ62114401
Mainboard P/N: EAY62512702, EBU61749102

P a g e | 34

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 35

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 36

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 37

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 38

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 39

T-con & Panel Part Numbers

1) 32LH30 Interconnect

TV Models: JVC LT-32J300, JVC LT-32P300, JVC LT-32JM30, LG 32LG5700,
LG 32LH30, LG 32LH3000

Part Number:6871L-1438C
T-con Board P/N: 6870C-0230A (Similar to 6870C-0266A, LC320WUN)
DESC or Panel Sticker Number: LC320WUN-SAB1

Photo Source: Shopjimmy.com

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 40

http://www.LCDRepairGuide.com/screen-repair-v2/

2) 37LH55 Interconnect

TV Models: LG 37LH55, LG 37LH5000
PANEL P/N: EAT60664401
Part Number: 6871L-1588A
T-con Board P/N: 6870C-0264B
DESC or Panel Sticker Number: LC370WUD-SBM1

P a g e | 41

Photo Source: Shopjimmy.com

Warning: T-CON PWB under shield. Put screws back in before operating set with
shield removed.

Note: CN1 Pin-1 is P800 Pin-51 (20 bit LVDS)

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 42

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 43

CN3: Pins-1, 2, 4 => GND, Pin-3= P-DIM. Pin-3 PDIM (Digital Dimming) can
vary according to the brightness level of the video signal and the OSD Backlight
setting. 0.6V= 0% to 3.3V= 100%. Ouput from the Video Processing chip IC100
(Mstar).

http://www.LCDRepairGuide.com/screen-repair-v2/

3) 42LB5800 Interconnect

TV Models: LG 42LB5600, LG 42LB5800, LG 42LY540S
PANEL P/N: EAJ62572101
Part Number: 6871L-3454D
T-con Board P/N: 6870C-0480A
DESC or Panel Sticker Number: V14 42 DRD 60Hz Control_Ver0.3

P a g e | 44

Photo Source: Shopjimmy.com

Warning: T-con board under shield. Be sure to reinsert screws before operating set
with shield removed.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 45

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 46

42LB5800 P7100 LVDS Connector Video Waveforms

All LVDS signals are taken with SMPTY Color Bar signal input (1080P)
Component Input. All LVDS signals are “Differential Pairs”. The ones shown are

the “Positive” signal of the pair. The Negative signal looks exactly the same but

flipped 180 degree. Scope settings are 100mV per/division, 2.5uSec per/division.

4) 42LG70 Interconnect

TV Models: LG 42LG70, LG 42LG7000, Philips 42PFL7403D/27, Philips
42PFL7403D/F7, Vizio SV420XVT1A

PANEL P/N: EAT56803001
Part Number: 6871L-2040D
T-con Board P/N:6870C-0202B
DESC or Panel Sticker Number: LC420WUF-SAA1

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 47

T-con PWB under shield. Be sure to reinsert screws before operating set with
shield removed.

LD1:

Set In Stby: LD1 Off (Anode 0V, Cathode 0V)
Power On: LD1 Lit (Anode 12V, Cathode 0V)
Set On: LD1 Off (Anode 12V, Cathode 9.6V)

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 48

5) 42LH20 Interconnect

TV Models: 42LH20
PANEL P/N:
Part Number: 6871L-1596A
T-con Board P/N: 6870C-0240C
DESC or Panel Sticker Number: LC-420WXN/LC370WXN (or LC420WXE-

SBA1)

Photo from: Shopjimmy.com
Warning: T-con board under shield. Be sure to reinsert screws before operating set

with shield removed.

P801 Pin-3 PWM-DIM, 3.15V (Max 100%) to 0.6V (Min 0%) Customer’s MENU
backlight setting. However, this is not used on the T-CON Board.

http://www.LCDRepairGuide.com/screen-repair-v2/

LED1:
Set In Stby: LED1 Off (Anode 0V, Cathode 0V)

P a g e | 49

Power On: LED1 Lit (Anode 3.3V, Cathode 0V)
Set On: LED1 Off (Anode 3.3V, Cathode 1.3V)

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 50

6) 42LH50 Interconnect

TV Models: LG 42LH50, LG 42LH5000, LG 42LH5010, VIZIO SV421XVT,
SV422XVT

PANEL P/N:
Part Number: 6871L-4700F
T-con Board P/N: 6870C-4100D
DESC or Panel Sticker Number: LC420/470WUF-SBM1_SBL

Photo from: Shopjimmy.com

http://www.LCDRepairGuide.com/screen-repair-v2/

UC1 drives Q2 which drives LD1 to assist the backlights during start up.

P a g e | 51

LD1:
Set In Stby: LD1 Off (Anode 0V, Cathode 0V)
Power On: LD1 Lit (Anode 3.3V, Cathode 0.7V)

30 seconds later,
Set On: LD1 Off (Anode 3.3V, Cathode 1.38V)

http://www.LCDRepairGuide.com/screen-repair-v2/

7) 42LH90 Interconnect

TV Models: LG 42LH90
PANEL P/N: EAT60665101
T-con Board P/N: 6870C-4000H
DESC or Panel Sticker Number: LC320/420/470/550WU_120Hz Control

(LC420WUL-SBM1)

P a g e | 52

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 53

8) 42LK520 Interconnect

TV Models: LG 42LK520_530, LG 42CS570
PANEL P/N:
Part Number: 6871L-1973H
T-con Board P/N: 6870C-0309D
DESC or Panel Sticker Number: LC420WUF-SCA2 (DESC: V5 LC370/420WUD)

LG 42LK520 Main +12V Voltage Distribution

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 54

Panel Test:

To run the T-CON “Panel Test, remove the LVDS cables. Jump 12V to the 12V
fuse. Jump VCC 3.3V to pin-44 on CN1. White, Red, Blue, Green and Black
patterns show on screen.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 55

9) 42LN5300 Interconnect

TV Models: LG 42LN5200_5300_5400_5700, LG 42WT30, LG 42WL10,
Panasonic TH-42LRU60, Sanyo DP42D23 P42D23-00 & P42D23-11

PANEL P/N: EAJ62310701
Part Number: 6871L-3403A
T-con Board P/N: 6870C-0452A
DESC or Panel Sticker Number: LC420DUE-SFR5, LC420DUE-SFR1 (similar to

LC500DUE-SFR1)

Photo from: Shopjimmy.com
Warning: Be sure to install the screws in the T-CON board before applying power.

Damage to the board will occur.

Panel Test:

To run the T-CON “Panel Test”, remove the LVDS cables. Jump 12V to the 12V
fuse. Jump VCC 3.3V to pin-44 on CN1. White, Red, Blue, Green and Black
patterns show on screen.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 56

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 57

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 58

LG 42LN5300 P1100 (Mainboard) CN1 (T-CON board) Connector Video
Waveforms

All LVDS signals are taken with SMPTY Color Bar signal input (1080P)

Component Input. All LVDS signals are “Differential Pairs”. The ones shown are

the “Positive” signal of the pair. The Negative signal looks exactly the same but

flipped 180 degree. Scope Settings are 100mV per/division, 2.5uSec per/division.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 59

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 60

10) 42LV5500 Interconnect

TV Models: LG 42LV5400, LG 42LV5500, LG 42LW5300
PANEL P/N: EAJ61749101
Part Number: 6871L-2693A
T-con Board P/N: 6870C-0358A
DESC or Panel Sticker Number: LC420EUF-SDA1 (V6 32/42/47 FHD 120Hz)

Warning: T-CON Board under shield. Be to reinsert screws before operating set
with shield removed.

PANEL Test:

To run the T-con “Panel Test”, remove the LVDS cables. Jump 12V to the 12V
fuse. Jup VCC 3.3V to pin-44 on CN1. White, Red, Blue, Green and Black
patterns show on screen.

Note: Before doing the Panel Test, make sure their backlight can lit/operating
normally.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 61

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 62

11) 42SL80 Interconnect

TV Models: LG 42SL80
PANEL P/N: EAT60667401
Part Number: 6871L-1828A
T-con Board P/N: 6870C-0259A
DESC or Panel Sticker Number: LC420WUD-SBM4 (42/47 Slim & Narrow

240Hz CONTROL)

Photo from: Shopjimmy.com

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 63

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 64

12) 47GA6400 Interconnect

TV Models: LG 47GA6400
PANEL P/N: EAJ62270801
Part Number: 6871L-3264A
T-con Board P/N: 6870C-0444A
DESC or Panel Sticker Number: LC470EUN-SFF2 (DESC: LC470DUE-SFR1)

Warning: Return the screws when servicing the T-CON board with shields
removed.

Note: Concerning Quick Start

If Quick Start is turned on in the Options Menu, T-CON 12V will be available
during STBY, but there will be no video to process. Also, no Backlight.

CN2: Global Dimming

Pin Label
(1) Scan 1, (2) Scan 2, (3) Scan 3, (4) GND
Note: Pins are inverted on inverter.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 65

PANEL Test:

To run the T-CON “Panel Test”, remove the LVDS cable CN1. Jump 12V to the
12V fuse on T-con board. Jump VCC 3.3V to pin-44 on CN1. White, Red, Blue,
Green and Black patterns show on screen.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 66

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 67

http://www.LCDRepairGuide.com/screen-repair-v2/

13) 47LB6000 Interconnect

TV Models: LG 47LB6000
PANEL P/N: EAJ63007701
Part Number: 6871L-3744A
T-con Board P/N: 6870C-0481A
DESC or Panel Sticker Number: V14 60Hz 1GID

P a g e | 68

Warning:
Be sure to install the screws in the T-CON board before applying power. Damage

to the board will occur.

PANEL Test:
To run the T-CON “Panel Test”, use the Smart Test Jig or remove the LVDS

cables. Jump 12V to the 12V fuses. Apply 3.3V to pin-44 on CN1. White, Red,
Blue, Green and Black patterns show on screen.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 69

http://www.LCDRepairGuide.com/screen-repair-v2/

14) 47LG90 Interconnect

TV Models: LG 47LG90
PANEL P/N:
Part Number: 6871L-1399B
T-con Board P/N: 6870C-0188B
DESC or Panel Sticker Number: LC470WUL-SAA1-731

P a g e | 70

Warning:
T-CON Board under shield. Be sure to reinsert screws before operating set with

shield removed.

Technical Note:

If there seems to be no back lights, disconnect CN8 and CN9 reapply power and if
backlights return the T-CON may be the root cause.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 71

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 72

15) 47LH85 Interconnect

TV Models: LG 47LF7700, LG 47LH85
PANEL P/N:
Part Number: 6871L-4470F
T-con Board P/N: 6870C-4000H
DESC or Panel Sticker Number: LC470WUF-SBB1 (DESC:

LC320/420/470/550WU_120Hz CONTROL)

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 73

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 74

16) 47LN5750 Interconnect

TV Models: LG 47LN5200_5400_5700_5750_5790
PANEL P/N: EAJ62310101
Part Number: 6871L-3152B
T-con Board P/N: 6870C-0444A
DESC or Panel Sticker Number: LC470DUE-SFU1 (DESC: LC470DUE-SFR1)

PANEL Test:

To run the T-CON “Panel Test”, remove the LVDS cables. Jump 12V to the 12V
fuse. Jump VCC 3.3V to pin-44 on CN1. White, Red, Blue, Green and Black
patterns show on screen.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 75

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 76

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 77

17) 47LW5600 Interconnect

TV Models: LG 47LS4500_47LV550_47LV5500_47LW5300_47LW5600, LG
47LW5700 , LG 47LW6500

Part Number: 6871L-2411C (Substitute: 6871L-2693A)
T-con Board P/N: 6870C-0358A
DESC or Panel Sticker Number: LC470EUF-SDF2 (DESC: V6 32/42/47 FHD

120Hz)

Warning:
T-CON Board under shield. Be sure to reinsert screws before operating set with

shield removed.

PANEL Test:

To run the T-CON “Panel Test”, remove the LVDS cables. Jump 12V to the 12V
fuse. Jump VCC 3.3V to pin-44 on CN1. White, Red, Blue, Green and Black
patterns show on screen.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 78

http://www.LCDRepairGuide.com/screen-repair-v2/

18) 47LX6500 Interconnect

TV Models: LG 47LX6500
PANEL P/N:
Part Number: EBR61004704
T-con Board P/N: EAX62110705 (0)
DESC or Panel Sticker Number: LC470EUS-SCA1

P a g e | 79

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 80

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 81

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 82

P802 Pin-2 (1.6V) with 3D source 3.32Vp/p 60Hz 3D-Sync:

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 83

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 84

LG 47LX6500 T-CON/3D Components Voltages

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 85

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 86

http://www.LCDRepairGuide.com/screen-repair-v2/

19) 47LX9500 Interconnect

TV Models: LG 47LX9500
PANEL P/N:
Part Number: EBU0107348, 61004703
T-con Board P/N: EAX61764003(3)
DESC or Panel Sticker Number: LX95M47T480V5 (DESC: LA02M)

P a g e | 87

Photo from: Shopjimmy.com

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 88

P804 “T-CON” to P7803 “Mainboard” P803”T-CON” to P7802 “Mainboard”

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 89

P802 Pin-50 Waveform:

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 90

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 91

.

http://www.LCDRepairGuide.com/screen-repair-v2/

LG 47LX9500 T-CON/3D Component Voltages

P a g e | 92

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 93

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 94

http://www.LCDRepairGuide.com/screen-repair-v2/

20) 55EA9800 Interconnect

TV Models: LG 55EA9800
PANEL P/N: EAJ62407601
Part Number: 6871L-3395B
T-con Board P/N: 6870C-0468B
DESC or Panel Sticker Number: LC550LUD-MFP2-L31

P a g e | 95

Warning:

Make sure screws are in place, damage to the board may occur if they are left out.
FI13 ~17 are ground protect EMI Filters.

Make sure before reassembling the cover and counter weights that the Heat
Transfer materials “Chocolate” are replaced over UC17 and UC33-U36.

http://www.LCDRepairGuide.com/screen-repair-v2/

Left Side of T-con Board:

P a g e | 96

Right Side of T-con Board:

http://www.LCDRepairGuide.com/screen-repair-v2/

Name:

Volts:

Name:

Volts:

0.9V_Core

0.94V

VPRED L

7.99V

1.5V

1.5V

VPRED R

6.54V

1.9V

1.9V

2.5V

2.5V

3.3V

3.3V

ELVSS

Not Used

S_VCC

1.8V

UVREF1

0.39V

VCC

3.27V

VDD1

16.07V

VDD2

16V

VGH_L

22.96V

VGH_R

6.54V

VGL

(-6.98V)

VIN1

11.59V

T-CON Panel Connector Checks:

CN15 Connector CN12 Connector

P a g e | 97

T-CON Key Voltage Checks:

http://www.LCDRepairGuide.com/screen-repair-v2/

21) 55GA6400 Interconnect

TV Models: LG 55GA6400
PANEL P/N: EAJ62271001
Part Number: 6871L-3269A
T-con Board P/N: 6870C-0444A
DESC or Panel Sticker Number: LC470DUE-SFR1

P a g e | 98

Warning:
Return the screws when servicing the T-CON board with shields removed.

Note: Concerning Quick Start

If Quick Start is turned on in the Options Menu, T-CON 12V will be available
during STBY, but there will be no video to process. Also, no backlights.

PANEL Test:

To run the T-con “Panel Test”, remove the LVDS cable CN1. Jump 12V to the
12V fuse. Jump VCC 3.3V to pin-44 on CN1. White, Red, Blue, Green and Black
patterns show on screen.

http://www.LCDRepairGuide.com/screen-repair-v2/

P a g e | 99

CN2 Global Dimming
Pin Label (Note: Pins are inverted on Inverter)

(1) Scan 1, (2) Scan 2, (3) Scan 3, (4) GND

http://www.LCDRepairGuide.com/screen-repair-v2/

LG 55GA6400 T-CON Board Component Voltages

P a g e | 100

http://www.LCDRepairGuide.com/screen-repair-v2/