Chapter 8 Fixing System; Operations; Outline - Canon CLC 1120 Service Manual

I.

OPERATIONS

A. Outline
Table 8-101 shows the major functions of the fixing unit assembly.
Item
Method
Fixing assembly drive
Fixing heater
Fixing temperature detection
Cleaner
Oil application
Protective function
COPYRIGHT © 1999 CANON INC.
Heat roller method
Fixing motor (M5)
Main heater (H1): 540 W (100/120 V), 700 W (230 V)
Sub heater (H2):
Fixing upper thermistor 1 (THM1; at center of fixing upper roller)
Fixing upper thermistor 2 (THM2; at front end of fixing upper roller)
Fixing lower thermistor 3 (THM3; at center of fixing lower roller)
Fixing lower thermistor 4 (THM4; at rear end of fixing lower roller)
Fixing upper cleaning belt (for fixing upper roller)
Fixing lower cleaning belt (for fixing lower roller)
· Life estimated at about 25,000 copies.
· Driven by the fixing upper cleaning belt solenoid (SL1) and
the fixing lower cleaning belt (SL2).
· Number of operations varies according to the size of copy
paper.
Small size (182 to 216 mm; 1 operation per copy)
Large size (217 to 432 mm; 2 operations per copy)
· Length of cleaning belt detected by the following:
Fixing upper cleaning belt length sensor (PS11)
Fixing lower cleaning length sensor (PS67)
· Circulatory application of silicone oil by the oil pump (PSP1),
felt, and applying blade.
Capacity:
Detection of oil level:
Detection is executed as follows; shuts off the power to the fixing
heater in response to an error:
· Reading of thermistors (TH1 through TH4)
· Error in SSR
· Operating temperature (220°C) of the fixing upper thermal
switch (TP2; rear end of upper roller)
· Operating temperature (220°C) of the fixing lower thermal
switch (TP3; front end of lower roll)
Table 8-101
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 8 FIXING SYSTEM

Description
500 W (common to all voltage models)
equivalent of about 50,000 copies/L.
by fixing oil level sensor (PS10)
8-1