TROUBLESHOOTING GUIDE
E-34
NO USB ON PLAYBACK
Check P.CON 3.3V line of
IC4001 and peripheral circuit.
Is there voltage at pin 65
of IC4001 about 3.3V ?
Yes
No
Is there waveform
at pins 2 and 3 of
CP6602 ?
Change IC4001.
No
Yes
No
Yes
Check IC4001 and peripheral
circuit.
Is there voltage at pins 4
and 5 of IC6601 5V.
Change IC6601.
No
Yes
Is there voltage at pins 4
and 5 of CP6602 ?
Change CD6601.