LG U990 Service Manual page 118

VREG_MSMP_2.7V
KEY_ROW[2]
KEY_COL[0]
KEY_COL[1]
VA702(COL0)
SEND
VREG_MSMP_2.7V
CN700
1
2
3
4
5
SIDE KEY
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
700 701
SEND CLR
VA701(ROW2)
CLR
R707 470
KEY_ROW[0]
R708 470
KEY_ROW[1]
R709 470
KEY_COL[0]
R710 470
KEY_COL[1]
Schematic of key sense part
- 119 -
4. TROUBLE SHOOTING
PM_ON_SW_N
VA703(COL1)
END
END
END
ON_SW KEY
LOCK
SHOT
LGE Internal Use Only