Casio CD-350S Service Manual page 15

2-B
disc motor rotate?
Is waveform at pin
24 (DMEO) of IC902 like that
Is waveform at pins
14 to 16 of IC903 like that
Check sled motor (DC resistance : 12 Ω).
Check wire connector.
Vref
Figure 14
B
Does the
shown
in figure 14?
Yes
shown
in figure 15?
Yes
Vref
4 V
Yes
B1
(See page14)
No
No
4 V
Figure 15
— 13 —
Check circuit around pin
24 of IC902.
Check circuit around pins
14 to 16 of IC903.
IC902 is defective.