Table of Contents
Advertisement
CIRCUIT
VBAT
KEY_BACKLIGHT
CHECKING FLOW
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
KEY BACKLIGHT
(WHITE LED)
R317
0
C308
1u
START
Is the level at R317
Low(about 0V)?
YES
Check the VBAT
of R302~R313
YES
Are all LEDs
Working?
YES
Backlight will work properly.
- 65 -
4. TROUBLE SHOOTING
VA301
ICVS0505481FR
NO
Check U104
NO
Resolder or Replace
R302~R313
NO
Check the soldering
each R and LED
NO
Replace or resolder
component
VBAT
LGE Internal Use Only
Advertisement
Table of Contents
