Xerox FaxCentre F110, Service Manual

Page: 145 / 204

General Procedures / Information
FaxCentre F110 12/04 6-59
GP 25 Heat Control
A halogen lamp of 800W heats up the fuser. The initial heating time is around 15s, it means that
at full power, the temperature of the system change not faster than 8°C/s.
The FUSER signal switches on(1)/off(0) the halogen lamp. To protect the device against over-
heating, this signal is overridden by a thermal shutdown when necessary.
Figure 1
The output of the thermistor is measure through an ADC to enable an accurate regulation of the
temperature. See following diagram for the normal behaviour.
Figure 2
Lam p M ains
Fuser
Therm istor
AC
Power
165°C
±
3°C
145°C
±
3°C
Ambiant: 25 °C
Preheating: 15s
Waiting for
information
Printing
Inactivity:
30s
Cooling
down
Waiting
time: 4-5min
Fuser command
Fan command
Full speed
Half speed