2KJ/2KH
1-4-16
1-4-2 Self-diagnosis
(1) Self-diagnostic function
This unit is equipped with a self-diagnostic function. When a problem is detected, copying is disabled and the problem dis-
played as a code consisting of C followed by a number, indicating the nature of the problem.
A message is also displayed requesting the user to call for service.
After removing the problem, the self-diagnostic function can be reset by turning the main power switch off and back on.
List of system errors
When an unexpected error is detected for some reason, a system error will be indicated. After a system error is indicated,
the error can be cleared by turning the main power switch off and then on. If the error is detected continuously, however,
perform the operation shown in Table 1-4-1. If a system error occurs frequently, a fault may have occurred. Check the
details of the C call to take proper measures.
Table 1-4-1
Partial operation control
If any of the following calls for service is detected, partial operation control will be activated. After taking measures against
the cause of trouble, run maintenance item U906 to reset partial operation control.
Measures against the service codes detecting fuser problems
If one of the following service codes is detected, take actions to clear the cause of the trouble and perform maintenance
item U163 to reset the service code.
System error Contents Operation
0410 Document processor communication problem
System error
→ service call
0420 First paper feeder communication problem
System error
→ service call
0440 Built-in finisher communication problem
System error
→ service call
0500 Second paper feeder communication problem
System error
→ service call
0510 Third paper feeder communication problem
System error
→ service call
Code Contents
C8170 Finisher front side registration motor problem (optional built-in finisher)
C8180 Finisher rear side registration motor problem (optional built-in finisher)
C8190 Finisher trailing edge registration motor problem (optional built-in finisher)
C8210 Finisher stapler problem (optional built-in finisher)
Code Contents
C6000 Fuser heater break
C6020 Abnormally high fuser thermistor center temperature
C6050 Abnormally low fuser thermistor center temperature
C6400 Zero-cross signal error
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