LG U890 Service Manual page 50

3.10.4 Key Pad
There are 26 buttons and 3 side keys in Figure. Shows the Keypad circuit. 'END' Key is connected
On_SW to PMIC(PM6650-2) and MSM(GPIO76).
COL0
ROW0 HOT1 (VT)
ROW1 1
ROW2 4
ROW3 7
ROW4 HOT4 (*)
VREG_MSMP_2.7V
RA600
R608
10K
10K
KEY_ROW(0)
KEY_ROW(1)
KEY_ROW(2)
KEY_ROW(3)
KEY_COL(0)
KEY_ROW(4)
KEY_COL(1)
KEY_COL(2)
KEY_COL(3)
KEY_COL(4)
COL1 COL2
HOT2 (H3G) HOT3 (MENU) CLR (Clear)
2 3
5 6
8 9
0 HOT5(#)
Table Key Matrix Mapping Table
KEY
HOT1 HOT2 HOT3
1 2 3
1 2 3
4 5 6
4 5 6
7 8 9
7 8 9
HOT4 0 HOT5
HOT4 0 HOT5
Figure Keypad Circuit
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3. TECHNICAL BRIEF
COL3
LEFT
OK
SEND
DN
KEY_ROW(0)
SIDE_KEY_COL(5)
CLR MENU
CLR MENU
LEFT UP
LEFT UP
KEY_COL(5)
OK RIGHT
OK RIGHT
SND SEARCH
KEY_ROW(2)
KEY_ROW(1)
SND
SIDE_KEY_COL(5)
SEARCH
DN BACK
DN BACK
COL4 COL5
FUNC_1 Side key (camera)
UP Side key (Down)
RIGHT Side Key (Up)
FUNC_2
BACK
R602 100
D601
PRSB6.8C
R605
SIDE_KEY_COL(5)
200
R601 200
R603 200
CN601
1
2
D608
PRSB6.8C
CN600
1
2
3