8-1
DVP-FX921/FX921K/FX930/FX930CC/FX930WM/FX935
SECTION 8
TROUBLESHOOTING
8-1. ELECTRICAL TROUBLE SHOOTING GUIDE
No power on
by adaptor
No power on
by battery
Is adaptor
out 9.5V?
YES
NO
Is P1 OK?
Replace P1
Is D2 OK?
NO. +3.3V
NO. +5.2V
NO. +1.8V
Is U2 OK?
Replace U2
Is U3 OK?
Is U3 OK?
Replace U3
NO.
LCD power
Replace U3
Is U1 OK?
Replace U1
Replace D2
Replace adaptor
Is battery OK?
Replace Q2
Is Q2 OK?
Replace battery
AUDIO OUT ABNORMAL
SPEAKER ABNORMAL
Is J7, J8 OK?
Replace J7, J8
Replace U14
Replace U6
Replace speaker
Is U14 OK?
Is speaker OK?
Check audio jack & mode
Check U16
Check U15
Check signals from
U6 (MT1389LP)
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
1. A. Power (DC-DC Converter) circuit
B. Audio out abnormal
C. Speaker abnormal