Gestetner G060 Service Manual page 510

SC TABLE
SC No. Item
SC 553 Pressure roller
fusing lamp
overheat
SC 554 Pressure roller
fusing lamp low
temperature
error
SC 555 Pressure roller
fusing lamp
consecutive full
power
SC 556 Pressure roller
fusing lamp
temperature
fluctuation
SC 560 Zero cross error
G570
Definition
• Defective PSU
The detected pressure roller
• Defective BCU
temperature stays at 200°C
or more for five seconds.
• Loose connection
During stand-by mode or
printing, the detected
pressure roller temperature
• Defective pressure
stays at 50°C or less for five
seconds.
• Defective PSU
• Defective BCU
• Pressure roller
When the fusing unit is not
running in the Ready
condition, the pressure roller
fusing lamp keeps ON with
full power for 100
consecutive seconds.
• Loose connection of
The pressure roller
temperature changes by
±20°C or more in one
• Loose connection
second. This occurs three
times in one minute or two
consecutive times.
• Electrical noise in the
When the main switch is
turned on, the machine
checks how many zero-
cross signals are generated
during 500 ms. If the
number of zero-cross signal
generated is either more
than 66 or less than 45 and
when this condition is
detected 10 consecutive
times, this code is displayed.
Related
Possible Cause
SCs
between the fusing
unit and the machine
roller thermistor
thermistor out of
position
the pressure roller
thermistor
between the fusing
unit and main frame
supply from the
power cord
4-28
Troubleshooting Procedure
1. Replace the fusing unit.
2. Replace the PSU.
3. Replace the BCU.
1. Check the connection between the
fusing unit and main frame.
2. Replace the fusing unit.
3. Replace the PSU.
4. Replace the BCU.
1. Replace the fusing unit.
1. Check if the fusing unit is properly set
and connected to the main frame.
2. Check if the pressure roller thermistor
connector is firmly connected.
3. Replace the fusing unit.
1. Replace the PSU.
Type
A
A
A
A
A
SM