Casio CD-311S Service Manual page 20

2-B2
Is waveform R572
(TSO) like that shown
in Fig. 27 ?
Is waveform at pin
30 (TS20) of IC501 like that
shown in Fig. 27 ?
Is waveform at pins
13 to 14 of IC503 like that
shown in Fig. 28 ?
Check pickup.
3. No present at output terminals audio signal
Does audio
signal appear at IC504
pins 1 and 7 ?
Check D601 and D701.
Check around IC601.
B2
No
Yes
No
Yes
No
Yes
3
Yes
No
18
Check 16P flat cable.
Readjust VR501.
Check IC501.
Check around TE-Amp lines.
Check IC501.
Check around TSO lines.
Check IC503.
0.6V/1.5V
Figure 27
Check around IC502 pins 2~6 and IC504.
3V
Figure 28