Goldstar ffh-818a, ffh-717 TROUBLESHOOTING

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TROUBLESHOOTING

Turn power on.

Is power on?

Does initial read work?

Does it play?

Does it output audio?

Check power supply circuit.

(Check PN 807)

Check laser circuit.

Check focus circuit.

Check disc.

Check tracking servo circuit.

Check audio circuit.

OK

YES

YES

YES

YES

NO

NO

NO

NO

1.3V

A

B

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Fails to initial read

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO NO NONO

NO

NO

NO

NO

Does laser light?

Disc motor turns.

Does RF
waveform
appear?

TP 801(RF)

Does tracking
servo work?
Lower envelope
of TP801(RF)
waveform is flat.

Does signal
appear at
TP801(TEO)?

Does signal appear at IC 803
Pin and Pin ?

Does GFS (IC802 pin )
show as below?

Is rotation normal?

Is there no dropout of RF
signal?

Does TE2 signal
appear at pin
of IC801?

Defective IC
801, pick up
and/or open
wire.

Detective pattern.

Defective IC 801
and/or IC 803

Defective pick-up
and/or connector.

Defective IC 801.

Scratch in disc
initial read area.

Defective pick-up
adjustment focus offset.