Ricoh FT8880 Service Manual page 98

SYSTEM ERROR AND SERVICE CALL CONDITIONS
SC720 - Finisher Transport Drive Motor Overload
Definition:
The finisher transport drive motor control PCB cannot detect any pulses from
the transport drive motor when it is activated.
Points to check:
•
Mechanical interference with the transport drive motor
•
Transport drive motor
•
Transport drive motor control PCB
•
Fuse 1 on the transport drive motor control PCB
•
Finisher main control PCB
SC721 - Finisher Shift Motor Overload
Definition:
The finisher main control PCB cannot detect the shift tray half turn sensor
signal within 1.25 seconds after the shift motor is activated.
Points to check:
•
Mechanical interference with the shift motor
•
Shift tray half turn sensor
•
Shift motor
•
Finisher main control PCB
SC722 - Finisher Shift Tray Lift Motor Overload
Definition:
The finisher main control PCB cannot detect the stack height limit sensor
signal within 13 seconds after the shift tray lift operation is started.
Points to check:
•
Mechanical interference with the shift tray lift motor
•
Shift tray lift motor
•
Stack height limit sensor
•
Finisher main control PCB
6-2
5 June 1992