Ricoh FT8880 Service Manual page 100

SYSTEM ERROR AND SERVICE CALL CONDITIONS
SC742 - Finisher Staple Hammer Home Position Sensor Failure
Definition:
The finisher main control PCB cannot detect the staple hammer home
position sensor signal within 0.6 seconds after the staple motor is activated.
Points to check:
•
Mechanical interference with the staple motor
•
Staple hammer home position sensor
•
Staple motor
•
Finisher main control PCB
SC743 - Finisher Exit Drive Motor Overload
Definition:
The finisher main control PCB cannot detect any pulses from the exit drive
motor encoder when the exit drive motor is activated.
Points to check:
•
Mechanical interference with the exit drive motor
•
Exit drive motor
•
Finisher main control PCB
SC745 - Finisher Exit Unit Lift Motor Overload
Definition:
The finisher main control PCB cannot detect the exit unit half turn sensor
signal within 3.6 seconds after the exit unit lift motor is activated.
Points to check:
•
Mechanical interference with the exit unit lift motor
•
Exit unit lift motor
•
Exit unit half turn sensor
•
Finisher main control PCB
6-4
5 June 1992