Goldstar fh-x1 Service Manual trbl
Turn power on.
YES
NO Check power supply circuit.
(Check PN 101)
YES
YES
Does it output audio?
NO
NO
NO
Check laser circuit.
Check focus circuit.
Check disc.
Check tracking servo circuit.
w
c
Check audio circuit.
.
YES
Fails to initial read
-
Disc motor turns.
YES
I
Does RF
waveform
appear?
Cl 08(RF)
NO
Does tracking
servo work?
Lower envelope
of Cl08(RF)
waveform is flat.
1.3v
YES
Does laser light?
I
YE
s-B
Does signal
appear at pin @
of ICI02
YES
I
Does signal appear at IC 104
“~“~“~
Pin @ and Pin @?
~ NO 441
NO
Does TE2 signal
appear at pin @
of IC102?
YES
-i
A
-0
0
NO NO NO NO
Defective IC
102, pick up
and/or short
wire.
Detective pattern.
-
Is rotation normal?
YES
Is there no dropout of RF
signal?
llllllllllllllllllllllllllllll
YES
I
YES
NO
Does GFS (ICI03 pin @)
show as below?
I
I
Defective pick-up
b
and/or connector.
-
Defective IC 102.
t-
NO
Scratch in disc
W
initial read area.
L
Defective pick-up
adjustment focus off set.
-9-
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