LG L240 Service Manual page 31

3. Circuit Description
3.4.8 Keypad Map description
KBR(5)
KBR(0)
KBR(1)
KBR(2)
KBR(3)
KBR(4)
KBC(0)
KBC(1)
KBC(2)
KBC(3)
KBC(4)
KBC0
KBR0
KBR1
KBR2
KBR3 LEFT
KBR4 SOFT_LEFT
KBR5 MOD
KEYPAD
VREXTH
U501 FSA4157L6X
6 1
B1 S
5 2
GND VCC
R516
4 3
B0 A
150 C501 C502
0.1u 4.7u
STAR KB_501
R520
150
EVL5M02200
KB_504 KB_505
VA502
R522
150
EVL5M02200
SHARP KB_507
VA503
R524
150
EVL5M02200
LEFT UP
VA504
R526
150
PG05DBTFC
SOFT_LEFT SOFT_RIGHT
VA505
R528
150
PG05DBTFC
VA506
R529 150
R530 150
R531 150
R532 150
R533 150
EVL5M02200
VA508 VA509 VA510 VA511 VA512
EVL5M02200 EVL5M02200
EVL5M02200
EVL5M02200
<Fig.11> Keypad schematic
KBC1
* 7
0 8
# 9
UP
SOFT_RIGHT
END
- 32 -
VRIO
R535
U503
LMV7291MGX-NOPB 100K
5
1
4 VIN-
PWON
1 VCC
OUT 3 VIN+
GND
MOD
2
R536
200K
VA501
KB_502 KB_503 SEND
KB_506 KB501 CLEAR
KB_508 KB_509 HOT_RIGHT
OK DOWN RIGHT
HOT_LEFT
KBC2 KBC3
4
5
6
OK DOWN
HOT_LEFT VOL_UP
END
2
CN501
3
2
1
CN502
4
3
2
1
KBC4
1 SEND
2 CLEAR
3 HOT_RIGHT
RIGHT
VOL_DOWN