Key Pad - LG U8290 Service Manual

3. TECHNICAL BRIEF

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
ROW1 1
ROW2 4
ROW3 7
ROW4 HOT4 (*)
VREG_MSMP_2.6V
R4
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
2
5
8
0 HOT5(#)
Table 3.10.4-1 Key Matrix Mapping Table
RA1
10K
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
COL3
CLR (Clear)
3 LEFT
6 OK
9 SEND
DN
KEY_ROW(2)
CLR MENU
CLR MENU
LEFT UP
KEY_ROW(1)
LEFT UP
OK RIGHT
KEY_ROW(0)
OK RIGHT
SND SEARCH
KEY_COL(5)
SND
SEARCH
DN BACK
DN BACK
- 56 -
COL4 COL5
MENU Side key (camera)
UP Side key (Down)
RIGHT Side Key (Up)
SEARCH
BACK
VA7
AVLC14S02050
VA4
AVLC14S02050
VA5
AVLC14S02050
ZD2 INSTPAR
CN3
1
2
3
4