AIWA ADCM55
Service Manual

F==-%

Does the search waveform appear at FCS+ and FCS- (TP)?

NO
i

ICI 03 is defective. ICI 02 is defective.

I

-%YES YES

Does the S-shape waveform appear at FF (TP)?

ICI02 is defective.

NO

I
YES I Pickup is defective. ICI 01 is defective. I I

I
I

Is QI 01 collector about 2V?

NO

I
t Is pin-18 of ICI 01 �L�? YES ~

I I
NO

J101 is defective.

I
IC102 is defective,

I
w

IC101 is defective. Q101 is defective.

I

Does

a

disc rotate?

NO

Does waveform
~

appear

at pin-79

of ICI 02?

NO

ICI 02 is defective.

:;�

YES

J

YES

Do the voltages at SP+,SP- (TP) change according to waveform at pin-79 of ICI 02?

NO

*

ICI 03 is defective.

�ESL

M602 (spindle motor) is defective. JI 01 is defective. Mechanism is defective.

I

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