Keypad Back Light Trouble - LG KP500 Service Manual

5.9 Keypad back light trouble

Check Points
- Signal path is connected well
KEY Backlight LED
L D E R _
3 R
D
3 R 9 0
E K _ Y N E
2
D I N
3 R 3 1 3 R
0 1 K 0
KEY LED
KEY FPCB
VBAT
1 R 6 0 1 R 7 0
1 0 2 1 0 2
L 1 D 1 0 L 1 D 2 0 L
TP1
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Main FPCB
3 R 4 2
E K _ Y L B
0
5 2
I N
3
Q300
KTC4075E
1
EQBN0007601
2 1
0 1
1 R 8 0
1 0 2
1 D 3 0
L D E R _
V 1 A 5 0
V E 5 L 0 M 2 2 0 0
CN101
- 85 -
5. Trouble shooting
TP500
CN501
LGE Internal Use Only