Ricoh FT8680 Service Manual page 380

SYSTEM ERROR AND SERVICE CALL CONDITIONS
SC510 - 2nd Tray Lower Limit Sensor Failure
Definition:
The main PCB cannot detect the lower limit sensor signal within 20 seconds
after the tray down operation has been started.
Points to check:
•
Lower limit sensor
•
Tray drive motor
•
Tray drive wires
•
Interface PCB
SC511 - 3rd Tray Drive Abnormal
Definition:
The main PCB cannot detect any pulses from the 3rd tray paper volume
sensor within 3 seconds after the tray up or down operation has been started.
Points to check:
•
Mechanical interference with the tray drive
•
Paper volume sensor
•
Tray drive motor
•
Interface PCB
•
FU2 on the power supply unit (dc 24 V)
•
Main PCB
SC513 - 3rd Tray Lower Limit Sensor Failure
Definition:
The main PCB cannot detect the lower limit sensor signal within 10 seconds
after the tray down operation has been started.
Points to check:
•
Lower limit sensor
•
Tray drive motor
•
Tray drive wires
•
Interface PCB
6-18
31 July 1995