Only For Training And Service Purposes - LG U370 Service Manual

3.10.4 Key Pad
There are 23 main key buttons in Figure.
Shows the Keypad circuit. 'END' Key is connected to PMIC(PM6650).
ROW(0)
ROW(1)
ROW(2)
ROW(3)
ROW(4)
KEY_ROW(0)
KEY_ROW(1)
KEY_ROW(2)
KEY_ROW(3)
KEY_ROW(4)
KEY_COL(0)
KEY_COL(1)
KEY_COL(2)
KEY_COL(3)
KEY_COL(4)
Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

COL(0) COL(1)
- -
1 2
4 5
7 8
* 0
Table. Key Matrix Mapping Table
VREG_MSMP_2.7V
400
1
403
406
7
HOT400
HOT4
Figure. Main Keypad Circuit
COL(2) COL(3)
- CLR
3 LEFT
6 OK
9 SEND
# DOWN
KEY MAP
PM_ON_SW_N
EVL14K02200
HOT402 CLR
401 402 LEFT
2 3
404 405
4 5 6
407 408 SND
8 9
409 HOT401
0 HOT3
- 57 -
3. TECHNICAL BRIEF
COL(4)
MENU
UP
RIGHT
SEARCH
BACK
END
MENU
UP
OK RIGHT
SEARCH
DN BACK
LGE Internal Use Only