LG LG-V909DW - 4.16 Key troubleshooting

4. TROUBLE SHOOTING
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Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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4.16 Key troubleshooting
4.16.1 Reset Key Troubleshooting
To reset the system is pushed Reset Button (SW500). If it doesn’t work, you may replace Main Board.
4.16.2 Volume Key troubleshooting
To control the volume is pushed Button (KB1301, KB1302). If it doesn’t work, you may replace FPCB for Volume.
SW500
42
31
C501 470n
R505 100K
VDD_V2V2
10K
R502
C505
0.1u
HOT_RST_N
Reset
0031DZ
1031BK
100K
R1302
VDD_1V8
1031DZ
R1300
100K
2031BK
KEY_VOLUME_P
KEY_VOLUME_M