17 January, 2003
SC TABLE
4-25
SC No.
Item
Definition
Possible Cause
Related
SCs
Troubleshooting Procedure
Type
SC 544 Heating roller
fusing lamp
high
temperature
error
During stand-by mode or a
print job, the detected heating
roller temperature stays at
210 °C or more for 0.1 second.
•
Defective heating
roller thermistor
•
Defective PSU
•
Defective BCU
1. Replace the fusing unit.
2. Replace the PSU.
3. Replace the BCU.
A
SC 545 Heating roller
fusing lamp
consecutive full
power
When the fusing unit is not
running in the Ready condition,
the heating roller fusing lamp
keeps on with full power for 30
consecutive seconds.
•
Heating roller
thermistor out of
position
1. Replace the fusing unit.
A
SC 546 Heating roller
fusing lamp
temperature
fluctuation
The heating roller temperature
changes by
±
20°C or more in
one second. This occurs three
times in one minute or two
consecutive times.
•
Loose connection of
the thermistor
•
Loose connection
between the fusing
unit and main frame
1. Check if the fusing unit is properly set
and connected to the main frame.
2. Check if the heating roller thermistor
connector is firmly connected.
3. Replace the fusing unit.
A
SC 551 Pressure roller
thermistor error
The measured pressure roller
temperature does not reach
7°C for 30 seconds.
•
Loose connection of
pressure roller
thermistor
•
Defective pressure
roller thermistor
•
Defective BCU
1. Check that the pressure roller
thermistor is firmly connected.
2. Replace the fusing unit.
3. Replace the BCU.
A
SC 552 Pressure roller
warm-up error
After the main switch is turned
on or the door is closed, the
pressure roller temperature
does not reach the ready
temperature within 150
seconds during fusing unit
warm-up.
•
Pressure roller fusing
lamp broken
•
Defective pressure
roller thermistor
•
Defective BCU
1. Check if the pressure roller thermistor
is firmly connected.
2. Replace the fusing unit.
3. Replace the BCU.
A
SC 553 Pressure roller
fusing lamp
overheat
The detected pressure roller
temperature stays at 200°C or
more for five seconds.
•
Defective PSU
•
Defective BCU
1. Replace the fusing unit.
2. Replace the PSU.
3. Replace the BCU.
A