Gestetner B070 Service Manual page 340

SERVICE CALL CONDITIONS
SC491: Polygonal Mirror Motor Cooling Fan Motor Lock
Definition [B]
The polygonal mirror motor cooling fan motor lock signal remains HIGH for 5s while
the polygonal mirror motor cooling fan motor is on.
Possible Causes
• Drive mechanism overload
• Obstruction has stopped the fan
• Fan connector loose
SC492: Development Unit Suction Motor
Definition [B]
While the development unit toner suction motor is operating, the lock sensor output
does not change for 1 s.
Possible Causes
• Motor lock due to overload
• BCU defective
SC495: Toner Bottle Unit Error
Definition [B]
The toner hopper sensor cannot detect toner even after the toner supply coil clutch
turns on 10 times within 2 s during toner supply during copying.
Possible Causes
• Toner supply pump motor defective
• Toner supply pump motor connector loose
• Toner supply coil clutch defective
• Toner supply coil clutch connector defective
• Toner near-end sensor (in the toner bank) defective
• Toner near-end sensor (in the toner bank) spring defective
• Toner blockage in the toner supply pump or toner supply path
• Toner hopper sensor defective
B070/B071
CÓPIA NÃO CONTROLADA
4-20
CÓPIA NÃO CONTROLADA
SM