Gestetner G060, Service Manual

Page: 286 / 1106

FUSING
G060 6-56 SM
Temperature Corrections
To prevent excessive glossiness caused by fusing temperature overshoot, there
are the following SP modes:
•
1-913: Fusing temperature is reduced after this number of pages during the job.
•
1-914: This shows how much the temperature is reduced
If a job using OHP or thick paper starts while the fusing unit is still warm, the fusing
temperature could be higher than the target for this type of paper, causing marks
on the output. To prevent this problem, we have the following SP modes:
•
1-996-4, 5: These SPs specify a limit, above which printing will not start.
Overheat Protection
•
If the heating or pressure roller temperature becomes greater than 200
°
C, the
CPU cuts off the power to the fusing lamp. SC543 for the heating roller or SC553
for the pressure roller is generated.
•
If thermistor overheat protection fails, there is a thermostat for the heating roller
and a themofuse for the pressure roller in series with the common ground line of
the fusing lamp.
•
If the thermostat temperature becomes greater than 210
°
C, the thermostat
opens, removing power from the fusing lamp.
•
If the thermofuse temperature becomes greater than 169
°
C, the thermofuse
opens, removing power from the fusing lamp.
•
At this time, the machine stops operation.