Casio ZD-1 Service Manual page 23

3-B
B
Does
disc motor rotate ?
Yes
* Check soldering IC702.
* Check IC702.
No
Does CD mechanism
operateing normary ?
Yes
Is waveform at
pin 13 of IC703 llike that
shown in Fig. 21 ?
Yes
Is waveform at
pin 11 of IC703 like that
shown in Fig. 22 ?
Yes
* Check CN703.
Figure 21
21
No
* Check CD mechanism
* Check CD turn table unit.
No
* Check CN702 and CN703.
* Check disc motor.
* Check soldering IC701.
No
* Check IC701.
Figure 22
2.5V