Service Call Conditions
D017/D018/D019/D020 4-16 SM
roller rotating. 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.
590 B Exhaust fan motor error
The CPU detects an exhaust fan lock
signal for more than 3.5 seconds.
Poor connection of the
exhaust fan motor
Too much load on the motor
drive
620 B Communication error between IPU and ADF
A break occurred in
the connection
between the IPU and
ADF
ADF disconnected
ADF defective
IPU harness connection loose, broken
IPU defective
External noise
621 B Communication timeout between BCU and finisher
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