LG KF690 Service Manual page 44

3.9.4 Key Pad
There are 18 key buttons. Shows the Key Matrix & Keypad circuit. 'END' Key is connected to
PMIC(PM6635).
COL(0)
ROW0
ROW(1)
ROW(2)
ROW(3)
VREG_MSMP_2.7V
C100
0.1u
KEY_ROW(0)
100ohm R107
KEY_ROW(1)
100ohm R108
KEY_ROW(2)
100ohm R106
100ohm R105
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
COL(1)
1 2
4 5
7 8
* 0
[Table 3.8] Key Matrix Mapping Table
PM_ON_SW_N
100 101 102
1 2 3
103 104 105
4 5 6
106 107 108
7 8 9
HOT100 109 HOT101
HOT4 0 HOT3
KEY MAP
[Fig. 3.17] Main Keypad Circuit
- 45 -
3. TECHNICAL BRIEF
COL(2) COL(3)
3 SEND
6 CLR
9 COM
#
END
VREG_MSMP_2.7V
PRSB6.8C
KEY_ROW(0)
KEY_COL(4)
SND
CLR
COM
CAMERA
CAMERA
FOCUS
COL(4)
0
CAMERA
FOCUS
OK
SIDE KEY
LGE Internal Use Only