Ricoh M156, Руководство по обслуживанию

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Service Call
SM 6-5 M156/M157/M176/M177
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The thermistor output is less than 0°C for 5 seconds after the fusing lamp turns
ON.

Disconnected or defective thermistor

Disconnected or defective fusing lamp
1. Check the harness connection of the thermistor.
2. Replace the fusing unit.

Execute "Fuser SC Reset" to recover the machine after completing the
recovery procedure. Otherwise, the machine continues to issue this SC
code and cannot be operated.
542
Fuser reload error
This SC is issued if one of following conditions occurs:
The fusing temperature rises 8°C or less in 1.5 seconds; and this continues 5
times consecutively.
-or-
The fusing temperature has not reached 45°C within 9 seconds (after the fusing
lamp comes ON while the machine is warming-up).
-or-
The fusing unit does not attain reload temperature within 35 s. (normal
temperature) or 65 s (lower temperature – the thermistor output is less than 18°C)
after the fusing temperature control starts.

Defective or deformed thermistor

Incorrect power supply input at the main power socket
1. Defective fusing lamp
543
High temperature error (Soft)

The detected temperature stays at 235°C for 1 second, and this
consecutively occurs 10 times.

Defective Main board

Defective PSU
1. Replace the Main board
2. Replace the PSU

Execute "Fuser SC Reset" to recover the machine after completing the
recovery procedure. Otherwise, the machine continues to issue this SC
code and cannot be operated.