Troubleshooting - LG FFH-164 Manual

TROUBLESHOOTING

Turn power on.
Is power on?
YES
Does initial read work?
YES
Does it play?
YES
Does it output audio?
YES
OK
NO
NO
Check the DISK turns
YES
Check the Laser
YES
Check the focus circuit
YES
Check the TRAKING circuit
NO
NO
- 2-2 -
Check power supply circuit.
PN508 PIN 8, 6.2V
PN508 PIN 7, 5V
IC503 PIN 2, 3.3V
NO
Check the connector
PN502, PN503, PN507
Check the tracking servo circuit.
Check the PN508 PIN1, 3
YES