Keypad Back Light Trouble - LG KS360 Service Manual

5. Trouble shooting

5.10 Keypad back light trouble

Check Points
-Signal path is connected well
-TR is working properly
TP2
LGE Internal Use Only
QWERTY_KEY BACKLIGHT
VBAT
LD300
LEWWS44-E
LD301
LEWWS44-E
LEWWS44-E LD302
MULTI_KEY BACKLIGHT
VBAT
C101
1u
TP2
R110
SUB_KEY_BL
1K
R310
47 TP1
R311
QWERTY_KEY_BL
47
R312
47
Q100
2SC5585
TP1
Copyright © 2008 LG Electronics. Inc. All right reserved.
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C102
1u
Only for training and service purposes