LG KF690 Service Manual page 64

VREG_MSMP_2.7V
KEY_ROW(0)
100ohm
KEY_ROW(1)
100ohm
KEY_ROW(2)
100ohm
100ohm
KEY_ROW(3)
KEY_COL(0)
KEY_COL(1)
KEY_COL(2)
KEY_COL(3)
KEY_COL(4)
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C100
0.1u
100
R107
1 2
103
R108
4 5
106
R106
7 8
HOT100
R105
HOT4 0
[Fig. 4.1] Schematic of key sense part (KEY FPCB)
- 65 -
4. TROUBLE SHOOTING
END
PM_ON_SW_N
PRSB6.8C
101 102 SND
3
104 105 CLR
6
107 108 COM
9
CAMERA
109 HOT101
FOCUS
HOT3
CAMERA
LGE Internal Use Only