LG -E510 Service Manual page 49

3.12.3 KEY
3.12.3.1 Side key
There are 2 side key , Send, and END buttons that are controlled by MSM7227T.
Refer to the circuit.
KEY_ROW[0]
KEY_ROW[1]
KEY_COL[2]
LGE Internal Use Only
Figure. Volume Side key
KPD_PWR_N
Figure. End key
KB101
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3. TECHNICAL BRIEF
4
3
2
1
CN704
Only for training and service purposes