Indicator Led Trouble - LG C1100 Service Manual

4. Trouble Shooting

4.14 Indicator LED Trouble

Test Points
Circuit Diagram
RLED
G
Checking Flow
CN201
21 22
R261
0
GREEN LED
R263
0
RED LED
Q201
6
R225
5
10K
4
R223 17K
UMX1NTN
START
No
VBAT of U102 is
3.6~4.2V?
Yes
No
Are both LEDs not
working?
Yes
Replace Q201, and try again.
BACKLIGHT WILL
WORK PROPERLY.
- 80 -
R225 R229
Q201
R226 R227 R264 R262
Figure 4-26.
R262
0
R264
NA
1
R226 47K
2
R227
3
47K
Check the VBAT of U102.
Check the soldering or replace LEDs not working.
GLED
RED_LED