Fresa G024, Руководство по обслуживанию

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TRANSPORT/FUSING/PAPER EXIT UNIT 31 March, 1999
2-58
2.7.5 TEMPERATURE CONTROL
The hot roller [A] and pressure roller [B] have independent thermistors [C] to
monitor temperature.
The hot roller fusing lamp is easier to heat or cool than the pressure roller fusing
lamp, and may overheat quickly if left on. Therefore, the reheat start temperature
for the hot roller fusing lamp is 10
°
C higher than that for the pressure roller fusing
lamp.
The hot roller and pressure roller fusing lamps are heated alternately. When a
fusing lamp reaches the reheat start temperature, the lamp is switched on and off
alternately (the cycle is 1 second; for example, within this cycle, the printer may
switch the lamp on for 0.6 s, and off for 0.4 s).
In level-1 energy-saving mode, the fusing
lamps are turned off. In level-2 energy-
saving mode, the fusing lamps are
intermittently turned on to keep the
pressure and hot roller temperature at
120
°
C. The user can select which mode
to use with the system menu in the user
tools.
Fusing lamp status
Fusing lamp
Below 130
°°°°
C 130
°°°°
C 140
°°°°
C 150
°°°°
C
Hot roller Full power Full power On/off Off
Pressure roller Full power On/off On/off Off
The thermofuse [D] opens when it reaches 167ºC, removing power from the fusing
lamp (this prevents the fusing unit from overheating).
G024D305.WMF
150
140
130
c
b
a
°C
Time
G024D524.WMF
a: Target temperature: 150
°
C
b: Hot roller temperature: Reheating starts at 150-10
°
C.
c: Pressure roller temperature: Reheating starts at 150-20
°
C.
[A]
[B]
[C]
[D]