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6.1.8 SC6XX: COMMUNICATION
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
610 D
Mechanical counter error: Bk
This SC is only for NA models.
The machine detects the mechanical counter error when SP5987-001
is set to "1".
 Disconnected mechanical counter
 Defective mechanical counter
1. Check or replace the mechanical counter.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
622 D
Paper tray unit communication error
While the BICU communicates with an optional unit, an SC code is
displayed if one of following conditions occurs.
 The IPU receives the break signal which is generated by the
peripherals only just after the main switch is turned on.
 When the BCU does not receive an OK signal from a peripheral
100ms after sending a command to it. The IPU resends the
command. The IPU does not receive an OK signal after sending
the command 3 times.
 Cable problems
 BICU problems
 PSU problems in the machine
 Main board problems in the peripherals
1. Check if the cables of peripherals are correctly connected.
2. Replace the main board of peripherals.
3. Replace the BICU if no power is supplied to peripherals.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
623 D 2nd Paper Bank communication error
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