Gestetner G060, Service Manual

Page: 137 / 1106

SC TABLE
SM 4-23 G060
SC No. Item Definition Possible Cause
Related
SCs
Troubleshooting Procedure Type
SC 554 Pressure roller
fusing lamp
low
temperature
error During stand-by mode or
printing, the detected pressure
roller temperature stays at 50
°C or less for five seconds.
•
Loose connection
between the fusing
unit and the machine
•
Defective pressure
roller thermistor
•
Defective PSU
•
Defective 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.
A
SC 555 Pressure roller
fusing lamp
consecutive
full power 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.
•
Pressure roller
thermistor out of
position
1. Replace the fusing unit. A
SC 556 Pressure roller
fusing lamp
temperature
fluctuation The pressure 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 pressure roller
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 pressure roller thermistor
connector is firmly connected.
3. Replace the fusing unit.
A
SC 560 Zero cross
error 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.
•
Electrical noise in the
supply from the
power cord
1. Replace the PSU. A