Fuser Control - Xerox Phaser 6360 Service Manual

Fuser Control

Phaser 6300/6350/6360 Color Laser Printer Service Manual
Fuser Temperature Control
During Fuser temperature control the printer's target temperature is set based
on the media type. The Heat Roller surface temperature is controlled to match
the target temperature by turning the heater lamp On and Off.
The Heat Roller surface temperature is detected by two sensors. A Non-
Contact Sensor (NCS) in the middle of the roller and the Temperature Sensor
at the edge of the roller. These sensors are checked every 10 ms to maintain
an even temperature across the Heat Roller. If the readings indicate the
temperature is higher than the target, the heater lamp is turned Off. If the
readings fall below the target temperature, the heater lamp is turned On.
For the target temperature, different temperatures are set for standby, printing,
and process control. The target temperature is also changed according to the
inside temperature detected with the Temperature/Humidity Sensor, print
count, print mode, input power supply voltage and paper type.
Cool Down
During printing, the temperature distribution of the Heat Roller becomes
uneven. To compensate, a wait time is provided and the heater lamp is kept
Off. When Heat Roller temperature stabilizes, printing resumes.
Theory of Operation
2-15