LG DS80QY.DDEULLK Service Manual

3-6
Copyright © 2022 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
< MAIN board bottom view >
DGND
LCD_CD
TP1037
LCD_DAT
TP1034
TP1036
LCD_CLK
LCD_STB
DGND
3.3VA
REMOCON
TP1038
TP1033
TP1035
TP1032
C1024
100nF
LCD_BL
LCD_RST
TP1039
GLED
R1096
0
C1022
100nF
/25V
TP1029
TP1030
CN1002
EAG64811001
12P 2.0MM ANGLE MALE
6
LCD_RST
10
LCD_BL
8
LCD_STB
3
GND
9
LCD_DAT
11
LCD_CLK
1
VCC_5V
12
GLED
5
3.3VA
2
GND
7
LCD_CD
4
RMC
12V
R1097
0
Front LCD & LED
ONE POINT REPAIR GUIDE
NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR
“HELLO” ON FRONT PANEL
When you turn on your set, no message on the front panel, and LED doesn’t work.
1-3. LCD System power 12V, 3.3 VA (No 12V, 3.3 VA)
1-3-1. Solution
Replace MAIN/ FRONT board.
1-3-2. How to troubleshoot (Countermeasure)
1) Please check 12 V at TP1029 of MAIN board.
1-a) If 12 V is abnormal, replace MAIN board.
1-b) If 12 V is OK, replace FRONT board.
2) Please check 3.3 VA at TP1033.
2-a) If 3.3 VA is abnormal, replace MAIN board.
2-b) If 3.3 VA is OK, replace FRONT board.
1-3-3. Service hint (Any picture / Remark)
TP1029
TP1029
TP1033
TP1033

LG DS80QY.DDEULLK Specifications

General

Brand	LG
Model	DS80QY.DDEULLK
Category	Speaker System
Language	English