LG KG271 - Key Backlight Trouble

4.8. Key backlight Trouble
4. TROUBLE SHOOTING
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D203 D200
D20
4
D201
D205
D202
R203
R204
Q200.PIN2
Q200.PIN3
TEST POINT
CIRCUIT DIAGRAM
KEY BACKLIGHT
(10V,K,X5R)
(10V,K,X5R)
LD201
VBAT
LEBB-S14H LEBB-S14H
LD200
2SC5585
Q200
LEBB-S14H
LD204
1u
C223
LD202
LEBB-S14H
100ohm
R220
LD203
LEBB-S14H
R219
100ohm
100ohm
R218
R223
10K
100ohm
R216
1KR222
LD205
LEBB-S14H
1uC222
R217
100ohm
R221
100ohm
KEY_BACKLIGHT