Ricoh FT8680 Service Manual page 386

SYSTEM ERROR AND SERVICE CALL CONDITIONS
SC743 - 2ND Sorter Staple Unit and/or Grip Home Position Sensor
Failure
Same as SC723
SC745 - 2ND Sorter Hammer Home Position Sensor Failure
Same as SC725
SC746 - Sorter Connection Failure
Definition:
The copier main PCB cannot communicate with the sorter main PCB, or the
sorter main PCB cannot communicate with the second sorter main PCB.
Points to check:
•
Connectors between the 1st and 2nd sorters
•
2nd sorter interface PCB
•
2nd sorter power line
•
Sorter main PCBs
•
FUSE1 on the sorter power supply PCB
SC790 - LCT Drive Abnomal
Definition:
The main PCB cannot defect any pulses from LCT 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
6-24
31 July 1995