LG GX / SPN5-W User Manual

3-7
Copyright © 2020 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
ONE POINT REPAIR GUIDE
CNF01
1
VLCD
2
VB0-
3
VB1+
4
VB1-
5
VB0-
6
VSS
7
VDD
8
SDA
9
SCK
10
CD
11
RSTB
12
CSB
13
LED(-)
14
LED(+)
RF01
220 (M)
CF3
10nF
VCC_5V
RF02
220 (M)
CF02
10uF
/10V(M)
FBF01
CF01
100nF
QF01
E
C
B
CF5
2.2uF
/10V(X5R)
TPF4
CF4
2.2uF
/10V(X5R)
TPF5
TPF3
TPF02
RF03 10M
TPF6
CF6 0.33uF
DGND
DGND
3.3VA
TPF7
TPF8
TPF9
TPF10
TPF11
TPF12
TPF13
TPF14
TPF01
TPF18
TO LCD MODULE


NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR “HELLO”
ON FRONT PANEL
When you turn on your set, it will blank / no message on front panel, LCD doesn’t work.
1-4. LCD System power VCC_5V
1-4-1. Solution
Replace MAIN/ LCD module.
1-4-2. How to troubleshoot (Countermeasure)
1) Please check VCC_5V of CNF01 pin14.
2) If VCC_5 V is abnormal, replace FRONT and MAIN board.
3) If VCC_5 V OK, replace LCD module.
1-4-3. Service hint (Any picture / Remark)
< FRONT board bottom view >
TPF7
TPF7
pin14
pin14
VCC_5V
VCC_5V
CNF01
CNF01



LG GX / SPN5-W Specifications

General

Brand	LG
Model	GX / SPN5-W
Category	Speaker System
Language	English