Goldstar fj-x4ax Service Manual troub
TROUBLE SHOOTING GUIDE (CDP)
Turn power on.
Is power on?
YES
Does initial read work?
YES
Does it play?
NO
NO
NO
Check power supply circuit.
Check laser circuit.
Check focus circuit.
Check disc.
Check tracking servo circuit.
YES
NO
Does it output audio? Check audio circuit
YES
OK
- 2 -
A
B
Fails to initial read
1.3V
Disc motor turns. Does laser light?
YES
YES
Does RF
waveform
appear?
(IC801 74 pin)
Is rotation normal?
Does tracking
NO NO NO NO
servo work?
Lower envelope
of IC801 74
pin(RF)
waveform is flat.
Does signal
appear at IC801
50 pin (TEO)
Does TE1 signal
appear at pin 54
of IC 801?
YESYES
YES
Does signal appear at IC 803
Pin 26 and Pin 27 ?
YES
NO
Does GFS (IC 802 pin 25
show as below?
NO
NO
Defective pattern.
Defective IC 801
and/or IC 803
Defective pick-up
and/or connector.
Defective IC 801.
Defective IC
801, pick up
and/or short
wire.
YES
Is there no dropout of RF
signal?
YES
- 3 -
NO
Scratch in disc
initial read area.
Defective pick-up
adjustment focus
offset or pick-up.
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