LG KF310 Service Manual page 67

4. TROUBLE SHOOTING
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)
VA4019 VA4020 VA4021 VA4022
ICVS0514X350FR ICVS0514X350FR ICVS0514X350FR
R4018 27
KEY_ROW(4)
R4020 27
KEY_COL(3)
R4022 27
KEY_COL(4)
Fig. Schematic of Main Board key sense part (Main and Side Key)
LGE Internal Use Only
KEY MAP
KB4000 HOT1 KB4001 C
KB4003 KB4004
1 2
KB4006 KB4007
4 5
KB4009 KB4010
7 8
KB4012 KB4013
HOT4 0
VA4023 VA4024 VA4025 VA4026
ICVS0514X350FR ICVS0514X350FR ICVS0514X350FR ICVS0514X350FR ICVS0514X350FR
VA4016 VA4017 VA4018
ICVS0514X350FR ICVS0514X350FR ICVS0514X350FR
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KB4002
HOT2
KB4005
3
KB4008
6
KB4011
9
KB4014
HOT3
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Only for training and service purposes