CASIO CD-311S
Manual de Servicio

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4

Press the play key. (PAUSE)

VREF-TSO

Vref Vref

Is waveform at R572 (TSO) like that shown in Fig. 29 ? No

Yes

* Readjust VR501.

Figure 29
VREF-TSO A VREF B A=B A+B=0.6V<

Is waveform at R572 (TSO) like that shown in Fig. 30 ? No

Yes

* Check wire connector CN502. * Check pickup.

Figure 30
Press the� � or � � key.

VREF-FMFB

Is waveform at pin 36 (FMFB) of IC502 like that shown in Fig. 31.

Yes

* Check around IC503. * Check sled motor.

Figure 31

No

VREF-TKIC

Is waveform at pin 33 (TKIC) of IC502 like that shown in Fig. 32 ?

Yes

* Check around IC501.

Figure 32

No * Check around pins 36 and 33 of IC502.

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