LG KE990 Service Manual - Page 49
Key Pad
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3. TECHNICAL BRIEF 3.9.4 Key Pad There are 5 key buttons. Shows the Key Matrix & Keypad circuit. 'END' Key is connected to PMIC(PM6635). ROW(0) ROW(1) ROW(2) COL(0) Lock SEND Table. Key Matrix Mapping Table COL(1) Capture AF CLR VREG_MSMP_2.7V KEY_ROW[2] KEY_COL[0] KEY_COL[1] R701 51K 700 701 SEND CLR EVLC14S02050 EVLC14S02050 EVLC14S02050 VA701 VA702 VA703 Figure. Main Keypad Circuit LGE Internal Use Only - 50 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
3.9.4 Key Pad
There are 5 key buttons. Shows the Key Matrix & Keypad circuit. ‘END’ Key is connected to
PMIC(PM6635).
3. TECHNICAL BRIEF
- 50 -
Table. Key Matrix Mapping Table
COL(0)
COL(1)
ROW(0)
Lock
Capture
ROW(1)
AF
ROW(2)
SEND
CLR
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]
Figure. Main Keypad Circuit