Service Call Conditions
SM 6-11 M052/M053/M054
Trouble-
shooting
547 D
Zero cross signal detection error
Zero cross signals were not detected within the prescribed time.
PSU, BICU harness loose or broken
PSU defective
557 B
Zero cross waveform signal error
The waveform of the zero cross signal was detected out of range.
Electrical noise on the power supply line
559 A
Consecutive fusing unit paper jams
Three consecutive paper jams occurred in the fusing unit.
The paper jam counter for the fusing unit reaches 3 times. The paper jam
counter clears after the paper feeds correctly.
Note: This SC is issued only if SP1159 is set to "1".
Remove the paper jam in the fusing unit.
Make sure that the paper path in the fusing unit is clear.
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