Key Pad - LG U250 Service Manual

3.11.4. Key Pad

There are 23 main key buttons in Figure.
Shows the Keypad circuit. 'END' Key is connected to PMIC(PM6650).
COL0
ROW(0)
ROW(1)
ROW(2)
ROW(3)
ROW(4)
VREG_MSMP_2.7V
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)
PM_ON_SW_N
COL1
1 2
4 5
7 8
* 0
Table. Key Matrix Mapping Table
400
1
403
4
406
7
HOT400
HOT4
Figure 1.19 Main Keypad Circuit
Figure 1.20 END Keypad Circuit
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3. TECHNICAL BRIEF
COL2
-
3
6
9
#
KEY MAP
CLR
401 402 LEFT
2 3
404 405 OK
5 6
407 408 SND
8 9
409 HOT401 DN
0 HOT3
END
END
COL3 COL4
CLR MENU
LEFT UP
OK RIGHT
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DOWN BACK
MENU
UP
RIGHT
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