Ricoh FT8680 Service Manual page 383

31 July 1995
SC700 - DF Feed-in Motor Overload
Definition:
The DF main PCB cannot detects any pulses from the feed-in motor encoder
or the pick-up roller home position sensor when the motor starts turning.
Points to check:
•
Mechanical interference with the feed-in drive mechanism
•
Feed-in drive motor and encoder
•
Feed-in drive timing belts
•
Pick-up roller home position sensor
•
Fuse (F2) on the DF main PCB
•
DF main PCB
SC701 - DF Transport Belt Motor Overload
Definition:
The DF main PCB cannot detect any pulses from the belt drive motor
encoder when the motor starts turning. Or, the motor continues turning after
the DF main PCB signals the motor to turn off.
Points to check:
•
Mechanical interference with the transport belt drive
•
Transport belt drive motor and encoder
•
Fuse (F1 and F3) on the DF main PCB
•
DF main PCB
SC702 - DF Inverter Motor Overload
Definition:
The DF main PCB cannot detect any pulses from the inverter motor encoder
when the motor starts turning.
Points to check:
•
Mechanical interference with the inverter drive
•
Inverter motor and encoder
•
Fuse (F4) on the DF main PCB
•
DF main PCB
SYSTEM ERROR AND SERVICE CALL CONDITIONS
6-21