LG DA-3520 - Audio Part Troubleshooting Guide

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SECTION 2. AUDIO PART
ELECTRICAL TROUBLESHOOTING GUDIE
Turn power on.
Is power on?
Does initial read work?
Does it play?
Does it output audio?
Check power supply circuit.
Check laser circuit.
Check focus circuit.
Check disc.
Check tracking servo circuit.
Check audio circuit.
OK
YES
YES
YES
YES
NO
NO
NO
NO
1.