Key Pad - LG U8500 Service Manual

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) and MSM(GPIO76).
COL0
ROW0 HOT1 (VT)
ROW1 1
ROW2 4
ROW3 7
ROW4 HOT4 (*)
VREG_MSMP_2.7V
RA600
R603
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 3.10.4-1 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 3.10.4-1 Keypad Circuit
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3. TECHNICAL BRIEF
COL3 COL4
FUNC_1
LEFT
OK RIGHT
SEND FUNC_2
DN BACK
CAMERA_SIDE_KEY
KEY_ROW(0)
SIDE_KEY_COL(5)
CLR MENU
CLR MENU
KEY_COL(5)
LEFT UP
LEFT UP
OK RIGHT
OK RIGHT
VOLUME_SIDE_KEY
SND SEARCH
SND
SEARCH
DN BACK
KEY_ROW(2)
DN BACK
EVLC14S02050
KEY_ROW(1)
EVLC14S02050
SIDE_KEY_COL(5)
COL5
Side key (camera)
UP Side key (Down)
Side Key (Up)
R671
100
EVLC14S02050 VA600
VA618
NA
R673 100
SIDE_KEY_COL(5)
CN601
R685
100
VA601
R672
100
VA602
EVLC14S02050 VA619
CN602
1
2
1
2
3