TROUBLESHOOTING GUIDE
D-1
POWER DOES NOT TURN ON
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.
Is the voltage at pin 11 of
CD502 about 3.3V and at
pin 10 of CD502 about 5V?