
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 119 -
Schematic of key sense part
CLR
SEND
R701
51K
701
700
VA702
EVLC14S02050
VA701
EVLC14S02050
EVLC14S02050
VA703
KEY_ROW[2]
VREG_MSMP_2.7V
KEY_COL[0]
KEY_COL[1]
END
ON_SW KEY
EVL14K02200
VA700
END
PM_ON_SW_N
VA702(COL0)
SEND
VA703(COL1)
VA701(ROW2)
CLR
END
SIDE KEY
470
R709
R710
470
470
R708
51K
R706
VA704
EVLC14S02050
51K
R705
VREG_MSMP_2.7V
R707
470
EVLC14S02050
VA707
EVLC14S02050
VA706
VA705
EVLC14S02050
5
CN700
1
2
3
4
KEY_ROW[0]
KEY_ROW[1]
KEY_COL[1]
KEY_COL[0]
LOCK
SHOT
Summary of Contents for U990
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