Keypad Back Light Trouble - LG Prada KE850 Service Manual

5.9 Keypad back light trouble

Check Points
- Signal path is connected well
- Analog SW is working properly
VBAT
R102 120 R101 120
LD102 LD101
PRECHARGING & KEY BACKLIGHT LED
2V85_IO
1
Q101 R124 1.5K
2
2SC5585
3
LED_R
- 91 -
5. Trouble shooting
VBAT VCHG
R123
U107 FSA4157L6X
1 6
S B1
2 5
VCC GND
3 4
A B0
C130
0.1u
0
KEYBACKLIGHT