LG KE990 Service Manual - Page 100
VA702COL0, VA703COL1, VA701ROW2
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4. TROUBLE SHOOTING VREG_MSMP_2.7V KEY_ROW[2] KEY_COL[0] KEY_COL[1] VA702(COL0) VA701 VA702 VA703 EVLC14S02050 EVLC14S02050 EVLC14S02050 R701 51K 700 701 SEND CLR PM_ON_SW_N END END EVL14K02200 VA700 VA701(ROW2 ) ON_SW KEY VA703(COL1) SEND CLR VREG_MSMP_2.7V R705 51K R706 51K CN700 1 2 3 4 5 R707 470 R708 470 R709 470 R710 470 KEY_ROW[0] KEY_ROW[1] KEY_COL[0] KEY_COL[1] EVLC14S02050 EVLC14S02050 EVLC14S02050 EVLC14S02050 VA704 VA705 VA706 VA707 SIDE KEY Schematic of key sense part Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes - 101 - END LOCK SHOT LGE Internal Use Only
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- 101 -
4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
CLR
SEND
701
700
51K
R701
EVLC14S02050
VA701
EVLC14S02050
VA702
VA703
EVLC14S02050
KEY_ROW[2]
VREG_MSMP_2.7V
KEY_COL[0]
KEY_COL[1]
ON_SW KEY
END
END
VA700
EVL14K02200
PM_ON_SW_N
SIDE KEY
VREG_MSMP_2.7V
R705
51K
R706
51K
470
R707
470
R710
R709
470
EVLC14S02050
VA704
EVLC14S02050
VA707
EVLC14S02050
VA706
EVLC14S02050
VA705
1
2
3
4
5
CN700
KEY_ROW[0]
KEY_ROW[1]
KEY_COL[1]
KEY_COL[0]
R708
470
Schematic of key sense part
LOCK
SHOT
VA702(COL0)
SEND
VA703(COL1)
VA701(ROW2)
CLR
END