Casio ZD-1 Service Manual page 24

3-C
C
Is waveform at
pin 42 (TEO) of IC701 like that
shown in Fig. 23 ?
Yes
Is waveform at
pin 44 (TE1) of IC701 like that
shown in Fig. 24 ?
Yes
Is waveform at
pin 13 (TAO) of IC701 like that
shown in Fig. 25 ?
Yes
Is waveform at
pin 18 of IC703 like that
shown in Fig. 26 ?
Yes
* Check CN701.
* VR704 adjustment is no good.
Readjust VR704.
(Refer to CD Adjustments)
* Check pickup.
100mV
Figure 23
No
No
No
Is pin 3 (DEFECT)
of IC701 high ?
No
* Check circuit around IC703.
50mV
Figure 24
22
* Check CN701.
* Check IC701.
* Check circuit around TE-Amp lines.
* VR703 adjustment is no good.
Readjust VR703.
(Refer to CD Adjustments)
No
Yes
* Check circuit around IC701.
* Check IC701.
200mV
Figure 25
* Check IC701.
0.4V
Figure 26