No.
Definition
Symptom Possible Cause
551 A
Fusing thermistor open (rear)
The fusing temperature detected by
the thermistor
is below 71°C and is
not corrected after the main power
switch is turned on.
Fusing thermistor defective or out of position
Power supply board defective
Loose connectors
552 A
Fusing temperature warm-up error (rear)
The fusing temperature rises less
than 7 degrees in 2 seconds, and
this continues 5 times
consecutively.
The fusing temperature is not
detected in 25 or 35 seconds.
Fusing thermistor defective or out of position
Fusing lamp open
Power supply board defective
553 A
Fusing overheat error (rear)
The fusing temperature is over
230°C for 1 second (detected by
the thermistor).
Fusing thermistor defective
Power supply board defective
555 A
Fusing lamp overheat error (rear)
After the fusing temperature
reaches
the
target temperature, the
fusing lamp does not turn off for 20
consecutive seconds.
Fusing thermistor defective or out of position
Power supply board defective
556 A
Unstable fusing temperature (rear)
The fusing temperature varies 50°
C or
more within 1 second, and this
occurs 2 consecutive times.
Thermistor defective or out of position
Power supply unit defective
559
Jam error detected 3 times in succession
The exit sensor and the duplex
sensor detect a paper jam 3 times
in succession
This condition can occur when SP
1159 1 is set to 'on'. The default is
'off'.
Paper jams can occur for the following reasons.
Dampness
Paper curl
Incorrect paper setting in the paper tray
Stripper pawls coming apart
Service Call Conditions
25
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