Fusing Temperature Control - Minolta EPI 054 User Manual

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 GENERAL, MECHANICAL/ELECTRICAL
98.04.24
1174SBM2101A

21-1. Fusing Temperature Control

The Upper Fusing Roller is heated by a Fusing Heater Lamp which is an AC halogen lamp.
The Fusing Thermistor installed on the Upper Fusing Roller helps keep the optimum fusing
temperature.
The fusing temperature is normally controlled at 195°C. To ensure good fusing perfor-
mance, however, 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:
If the initial fusing temperature is less than 90°C:
Temperature is controlled at 205°C for 3 min. after the copier has completed warming up,
which is followed by a temperature control at 195°C.
If the initial fusing temperature is less than 150°C:
Temperature is controlled at 205°C for 1 min. after the copier has completed warming up,
which is followed by a temperature control at 195°C.
If the initial fusing temperature is more than 150°C:
Temperature is controlled at 195°C after the copier has completed warming up.
TH1 is positioned at a point 84 mm from the paper path reference position, thereby prevent-
ing offset caused by low temperature and degraded fusing performance for small-size
paper.
The control temperature in the Energy Saving Mode is 100°C.
The Fusing Thermoswitch, 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 the Fusing Heater Lamp remains
ON due to a faulty temperature control circuit.
M-68
1174M008CC