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4. TROUBLE SHOOTING
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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
4
2
3
1
C501
470n
R505
100K
VDD_V2V2
10K
R502
C505
0.1u
HOT_RST_N
Reset
00
31
DZ
10
31
B
K
100K
R1302
VDD_1V8
10
31
DZ
R1300
100K
20
31
B
K
KEY_VOLUME_P
KEY_VOLUME_M