SECTION 2. ELECTRICAL
TROUBLESHOOTING
Turn power on.
Check power supply circuit.
Is power on?NOPN508 PIN 8, 6.2V
PN508 PIN 7, 5V
IC503 PIN 2, 3.3V
YES
NONO
Does initial read work?Check the DISK turnsCheck the connector
PN503, PN504, PN507
YES
YES
Check the Laser
YES
YES
Check the focus circuit
YES
Check the TRAKING circuit
NO
Does it play?Check the tracking servo circuit.
YES
NO
Does it output audio?Check the PN508 PIN1, 3
YES
OK
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