Casio PZ-3100, Руководство по обслуживанию

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B
Is the waveform
at IC102 pin 35 like that
shown in fig. 7 ?
Yes
Repair Item 2-B
No
*
Check soldering of C159 and IC103 pins
35 and 21.
*
IC103 is defective.
*
Check IC103 pins 32, 34, 4, 5, 36,
37, 38, 57, 21 and circuit around
them.
*
Check IC103 pins 8, 9 and 77.
*
IC104 or IC103 is defective.
When the waveform at IRF with an
osilloscope.
Figure 7
~1.1 V
8