Casio CD-311S Service Manual page 19

2-B1
Waveform
Is waveform at
pin 53 (RFI) of IC502 like that
shown in Fig. 25 ?
Is waveform at
pin 60 (PDO) of IC502 like that
shown in Fig. 26 ?
Check digital signal of IC502 and
IC801.
Check IC502 and IC801.
Figure 25
Confirm the waveforn at R570 (RFO) with a
syncroscope.
No
Yes
No
Yes
1.0~1.4V
B1
Waveform
Check around pin 53 of IC502.
Readjust VR502.
Check around PLL of IC502.
Figure 26
17
B2
4V