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2-A2
Is waveform
at C964 4.7UF (FSO) like that
shown in figure 12?
waveform at pins 21 to 23
of IC903 like that shown
in figure 13?
Check 15P flat cable.
Check focus coil of pickup
(DC resistance : 8 Ω).
Vref
All manuals and user guides at all-guides.com
A2
Is Q403
emitter 8V?
Yes
Yes
Is
Yes
0.2 V
Figure 12
No
Check circuit around Q403.
Check circuit around pin
No
16 (FSO) of IC902.
IC902 is defective.
Check circuit around
Yes
pins 20~23 of IC903.
Vref
Figure 13
— 12 —
2.5 V
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