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OPERATIONS AND TIMING
COPYRIGHT
©
1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
I. Fixing/Delivery Assembly
1. Controlling the Fixing Roller Tem-
perature
The upper and lower rollers of the fixing assembly
and the delivery roller of the delivery unit are driven
by the main motor (M1).
The upper roller is heated by a heater (H1:900W)
built in it.
The DC controller monitors the surface
temperature of the upper roller by means of two
thermistor (TH1, TH2) so as to control the
temperature to a specific value.
The temperature of the upper fixing roller is
controlled as follows (paper area):
160°C (at standby, during copy operation)
175°C (during copy operation)
To prevent drops in the temperature of the upper
roller during continuous copy operation, the control
temperature is as follow, measured with main ther-
mistor (TH1) Located out of paper area.
Aux themistor (TH2) is at same position of main
thermistor and is checking correct function of TH1.