
TROUBLESHOOTING GUIDE
D-1
POWER DOES NOT TURN ON
The voltage of 11PIN of
CD502 is about 3.3V?, and
is the voltage of 10PIN 5V?
No
Yes
No
Is there waveform at
X4001 about 3.0Vp-p ?
Check X4001, IC4001 and
peripheral circuit.
Yes
Write DVD ROM DATA.
Check AT+3.3V line of POWER BLOCK.
Check Q503 and peripheral circuit.