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LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
TP1
TP2
TP3
TP4
LD300
LD301
LD1
LD2
CIRCUIT
TEST POINT
Figure 4.14
Key PCB (Top)
Key PCB (Bottom)
Main PCB (Top)
SWAF07
LD301
1
A
2
C
100ohm
R309
R310
100ohm
VBAT
LD300
SWAF07
1
A
2
C
KEY_BACKLIGHT3
VBAT
100ohm
R116
SW
AF07
LD2
1
A
2
C
R117
100ohm
LD1
SW
AF07
1
A
2
C
SLIDE_KEY_BL_EN
TP1
TP2
TP4
TP3