Minolta EP4000, Общий, Механический/Электрический

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Interleaf EP5000/EP4000 GENERAL, MECHANICAL/ELECTRICAL
97.04.01
M-89
1156SBM2301A
23-1. Fusing Temperature Control
The Upper Fusing Roller is heated by Fusing Heater Lamp H1 which is an AC
halogen lamp. Fusing Thermistor 1 TH1 and Thermistor 2 TH2 installed on the
Upper Fusing Roller helps keep the optimum fusing temperature.
The fusing temperature is normally controlled at 200
°
C
during a copy cycle and at 190
°
C
in the standby state. To ensure good fusing performance even when the Lower Fusing
Roller remains cool immediately after warm–up in the early morning, the temperature
is controlled as follows when the copier is turned ON.
D
Temperature is controlled at 200
°
C for one hour after the copier has completed
warming up, which is followed by a temperature control at 190
°
C
.
If a copy cycle is started while the temperature is being controlled at 190
°
C , the tempera-
ture control at 200
°
C begins. As soon as the copy cycle is completed, control is again
switched to 190
°
C
.
TH1 is positioned at a point 30.5 mm from the paper path reference position, there-
by preventing offset caused by low temperature and degraded fusing performance
for small-size paper.
The control temperature in the Energy Saving Mode is 155
°
C. With EP5000, the
control temperature is 180
°
C in the Energy Saving Mode.
Fusing Thermoswitch TS1, installed above the Upper Fusing Roller, cuts off the
power to the Fusing Unit if the temperature of the Upper Fusing Roller becomes
excessively high. It eliminates the possibility of a fire that could occur when H1
remains ON due to a faulty temperature control circuit.
1151M012CA
1 hour after Power Switch ON
EP5000 Energy Saving Mode
During Copy Cycle
In Standby State
Copying Enabled
Energy Saving Mode OFF
In Energy
Saving Mode
Energy Saving Mode ON Copy Cycle Started Copying Enabled
During Predrive
Power Switch ON
Copy Cycle Completed
EP4000 Energy Saving Mode
200
_
C
190
_
C
180
_
C
165
_
C
155
_
C