LG GB220 Service Manual page 120

7. CIRCUIT DIAGRAM
1 2
A
B
C
D
E
1 2
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Only for training and service purposes
3 4 5
DOWN UP
UP DOWN
CN101
3 4 5
- 121 -
6 7 8
1 -> GND
KEY_ROW0
2 ->
KEY_COL1(UP)
3 ->
4 -> KEY_COL2(DOWN)
9 10
A
A
B
B
C
D
LGE Internal Use Only