Sharp CD-C500Z

Is the standby switch signal(L) being input to pin 50 of the
control microcomputer(lC801)?
T/ Replace the standby switch.
Is the loading end switch signal (H) being input to pin 49
of the control microcomputer (IC801)?
/
,
Noi Replace the loading end switch.
I
!
Yes
/ Is the motor drive output being output from pins 43 and 45
/of
7
The control microcomputer (IC801) is defective. Replace it.
Yes
Is the motor drive output being output from pins 3 and 10
Is there +10.5V at pins 7 and 9 of IC6?
of the motor driver (IC6)?
No
~ ,
/
Yes
The loading motor (M3) is defective. Replace it.
The loading mechanism is faulty.
:
i
No
>
Check to see if the PWB pattefn to
the power supply is damaged.
control microcomputer (IC801)?
The disc 1 switch is defective. Replace it.
Is the photo-interrupter signal (H) being input to pin 47 of
p Replace the photo-interrupter.
the control microcomputer (IC801)?
No
Yes
Is the motor drive output being output from pins 43 and 45
of the control microcomputer (IC801)?
No* The control microcomputer (IC801) is defective. Replace it,
Yes
Is the motor drive output being output from pins 2 and 10 p Is there +10.5V at pins 7 and 9 of IC6?
of the motor driver (IC6)?
’ b
No
I
i
Yes
The lift motor (M4) is defective. Replace it.
The lift mechanism is faulty.
r
Check to see If the PWB pattern to
Check the output of pins 53 (DM+) and 54 (DM-)
of ICl.
( Normal
i
Check the output of pin 2 of IC5.
Normal
Defective
____* IC5 is defective. Replace it.
Spin motor M2 is defective. Replace it.
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