Ricoh Aficio 480W Dolphin-C2 Service Manual page 155

28 April 2005
SC305 D Charge corona wire cleaner error
Wire cleaner motor feedback
voltage of less than 0.1 V was
detected for more than 1s.
Corona wire cleaning did not
complete within 80 s.
Charge wire cleaner did not
return to the home position.
Cleaner does not move from the
home position.
Temporary Solution
Do SP2804 to switch off the charge corona cleaner function.
SC345 D Development bias error
A development bias feedback
voltage of less than 0.25V was
detected for more than 200 ms
while the PWM duty value was
more than 1% (development
bias leak).
SC347 D Development drive motor lock
Development drive motor lock
signal is high longer than 5 s
when the development motor
rotates.
SC350 D ID sensor error 1 - Vsp
Vsp is 0V or more than 2.5 V.
During the copy cycle, this SC is
displayed after the copy is
executed.
SERVICE CALL CONDITIONS
• Wire cleaner motor connector
disconnected.
• Wire cleaner motor connector
disconnected.
• Wire cleaner motor is operating without
load.
• Wire cleaner stops due to an overload.
• Wire cleaner motor drive circuit
malfunction.
• Possible Cause
• CBG power pack defective
• Bias cable defective
• Poor bias cable connection
• Bias leak
Drive mechanism overload
Motor defective
Motor disconnected
• ID sensor defective
• ID sensor connector defective
• IOB malfunction
• CBG power pack defective
• Dirty ID sensor
• VDB defective
• LPH defective
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