Casio CD-350S, Руководство по обслуживанию

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— 15 —
2-B3
Is waveform at
pin 30 (TS20) of IC902 like that
shown in figure 21?
Yes
Is waveform at
pins 2 and 4 of IC903 like that
shown in figure 22?
Yes
Yes
l
Check circuit around pins 30~40
of IC902.
l
Check circuit around pins 1~5 of
IC903.
l
IC902 is defective.
l
Check flat cable.
l
Check tracking coil of pickup
(DC resistance : 8
Ω
).
No
No
No
Is waveform at
pin 35 (TSO) of IC902 like that
shown in figure 20?
Yes
B3
Is waveform
at pin 1(RFO) of IC902 like that
shown in figure 19?
No
l
Check circuit around pins 1~5
and 41~44 of IC902.
1.5
Figure 19 Figure 20
0.1
1.5
Figure 21 Figure 22