Xerox Phaser 4500 Service Manual

2-26 Phaser 4500 Service Manual
Fuser Control
The fuser heater control maintains the fuser at a pre-determined control temperature
by turning the Halogen Lamp in the Heat Roller ON and OFF. The control
temperature varies depending on whether or not the printer is at the Ready state, and
whether the Main Motor is operating.
The fuser temperature is considered abnormal when the detected temperature exceeds
250° C, or falls below 130° C.
Temperature Control
At the start of warm-up and when the Main Motor is at rest, the standby temperature
is used as the Fuser control temperature. When the Main Motor is operating except at
warm-up, the running temperature is used as the Fuser control temperature.
Fuser Warm-Up
The Halogen Lamp is turned on when the Fuser warm-up begins. When the surface
temperature of the Heat Roller (detected by the Thermistor) reaches the Fuser control
temperature (standby temperature), the Fuser warm-up is ended.
Fuser Temperature Cycling
The Fuser temperature does not remain at a single, constant temperature, but varies
within a temperature range. There are several ranges, which are summarized in the
table. Except for the Standby mode, the mode is determined by the media type.
Mode Temperature
Standby Lamp ON 180° C
Lamp OFF 185° C
Normal 1-100 pages:
Lamp ON 205° C
Lamp OFF 206° C
101-120 pages:
Lamp ON 205° C
Temp. decreases by
.25° C per page
120 + pages:
Lamp ON 200° C
Lamp OFF 201° C
Thick Paper 1 Lamp ON 210° C
Lamp OFF 211° C
Thick Paper 2 Lamp ON 215° C
Lamp OFF 216° C
Transparency Lamp ON 185° C
Lamp OFF 186° C

Xerox Phaser 4500 Specifications

General

Brand	Xerox
Model	Phaser 4500
Category	Printer
Language	English