Ricoh D027 Service Manual page 39

SC Tables
No. Type
621 D Finisher communication error
622 D Paper tray unit communication error
While the IOB communicates with an optional unit, an SC code is
displayed if one of following conditions occurs.
- -
1.
2.
3.
No. Type
2nd Paper Bank communication error
This SC is not issued for this machine.
623 D
When a communication error signal between the 1st paper bank and 2nd
paper bank is received.
No. Type
632 CTL Counter device error 1
D027/D029 APPENDICES
Details (Symptom, Possible Cause, Troubleshooting Procedures)
The IOB receives the break signal which is generated by the
peripherals only just after the main switch is turned on.
When the IOB does not receive an OK signal from a peripheral
100ms after sending a command to it. The IOB resends the
command. The IOB does not receive an OK signal after sending
the command 3 times.
Cable problems
IOB problems
BICU problems
PSU problems in the machine
Main board problems in the peripherals
Check if the cables of peripherals are correctly connected.
Replace the IOB or main board of peripherals.
Replace the BICU if no power is supplied to peripherals.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Loose connector
Details (Symptom, Possible Cause, Troubleshooting Procedures)
3-42 SM