Controlling The Fixing Temperature; Controlling The Temperature Of The Fixing Roller - Canon 1130 Service Manual

III. CONTROLLING THE FIXING TEMPERATURE
A. Controlling the Temperature of the Fixing Roller
The fixing upper roller and the fixing lower roller are each heated by a fixing heater (main
heater H1, sub heater H2). The surface temperature of the upper roller is monitored by the fixing
upper thermistor 1 (THM1) and that of the lower fixing roller is monitored by the fixing lower
thermistor 3 (THM3) in terms of voltage.
Using voltage readings, the DC-CPU on the CPU PCB causes the fixing upper heater drive
signal (UHON) and the fixing lower heater drive signal (LHON) to go '1' or '0' so as to control the
surface temperature of each roller to a specific level. (See Table 8-301.)
If energy saver mode has been selected in user mode, the surface temperature of the upper roller
and the lower roller is controlled as shown in Table 8-302.
During full-color copying
During mono-color copying
During standby
Note: The values in parentheses indicate the temperature detected by the thermistor.
COPYRIGHT © 2002 CANON INC.
Operation
Table 8-301
Saving rate Recovery time
0% 0 sec
10% 75 sec
25% 210 sec
50% 420 sec
table 8-302
CANON CLC1100/1130/1150/1160/1180 REV.1 JAN. 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 8 FIXING SYSTEM
Control temperature
Upper roller
Lower roller
158ºC (156ºC)
158ºC (156ºC)
162ºC (160ºC)
162ºC (160ºC)
158ºC (156ºC)
158ºC (156ºC)
Control temperature
158ºC
135ºC
100ºC
50ºC
8-9