Goldstar ffh-868a Service Manual trouble

TROUBLESHOOTING

Turn power on.

NO

Is power on?

YES

NO

Does initial read work?

YES

NO

Does it play?

YES

NO

Does it output audio?

YES

OK

Check power supply circuit. (Check PN 807)

Check laser circuit.

Check focus circuit.

Check disc.

Check tracking servo circuit.

Check audio circuit.

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Fails to initial read

		NO				NO		A
	Disc motor turns.			Does laser light?
				YES				B
YES

Does RF

NO

Does tracking

waveform

servo work?

appear?

Lower envelope

TP 801(RF)

of TP801(RF)

waveform is flat.

1.3V

YES

Is rotation normal?

NO

YES

Is there no dropout of RF signal?

YES

NO

Does signal

NO

Does TE2 signal

NO

appear at

appear at pin 53

Defective IC

TP801(TEO)?

of IC801?

801, pick up

and/or open

wire.

YES

YES

	Does signal appear at IC 803		NO
	Pin 26 and Pin	27 ?

YES

Does GFS (IC802 pin 25)								NO
show as below?

NO

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.

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