Casio ZD-3 Service Manual page 23

Repair Item: 2-C
Is waveform
at pin 41 (TEO) of IC701 like that
shown in figure 11 ?
Is waveform
at pin 12 (TAO) of IC701 like that
shown in figure 12 ?
Is waveform at
pins 27 and 28 of IC703 like that
shown in figure 13 ?
* Check FFC connector (CN701).
* Pickup is defective.
Figure 11
C
No
Yes
No
Yes
No
Yes
Figure 12
21
* Check FFC connector (CN701).
* IC701 is defective.
* Check circuit around TEO line.
* Check circuit around and soldering pins 22,
23, 24 and 42 of IC701.
* IC701 is defective.
* Check circuit around IC703.
Figure 13