LG KP105 - Electronic devices; Road safety; Blasting area

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Only for training and service purposes
4.8 Key backlight Trouble
4. TROUBLE SHOOTING
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Q301
TP1
TP2
LD301~LD306
R308~R313
TEST POINT
CIRCUIT DIAGRAM
KEY BACKLIGHT
56
R313
10K
R315
Q301
KTC4075E
R311
15
1u
C322
LD302
LEBB-S14E
R314 1K
VBAT
C323
1u
R308
10
LEBB-S14E
LD304
91
R309
LEBB-S14E
LD303
LD306
LEBB-S14E
LD301
LEBB-S14E
39
R312R310
91
LD305
LEBB-S14E
KEY_BACKLIGHT