Chapter 6 Fixing System; Basic Operations; Outline - Canon NP6045 Service Manual

I. BASIC OPERATIONS
A. Outline
The upper and lower rollers of the fixing assembly and the delivery roller are driven
by the main motor (M1) through clutches. (See Figure 6-101.)
The upper roller is equipped with two built-in heaters; the sub heater is turned on
during WMUP after power-on, and the main heater is turned on/off during WMUP and
thereafter for temperature control. (See Figure 6-102.)
The surface temperature of the upper roller is monitored by the main thermistor
(TH1) and is controlled by the DC controller so that it remains at the target value.
The cleaning belt for the upper fixing roller is operated by a one-way clutch method
using a solenoid (SL14; fixing cleaning belt drive solenoid).
You can display the message that warns against the running out of the cleaning belt
in service mode after the fixing cleaning belt drive solenoid (SL14) has turned on
250,000 times.
Further, you can check the cumulative number of times the fixing cleaning belt drive
solenoid has turned on in service mode (*6*; 'WEB').
The length of the cleaning belt is monitored by keeping the cleaning belt detecting
lever in contact with the belt. The cleaning belt detecting lever shifts as the belt is used
and fed, and 'E005' is indicated on the control panel when it blocks the sensor PS11.
The delivery assembly is equipped with a delivery paper deflecting plate; the DC
controller PCB generates the delivery flapper solenoid drive signal while causing two-
sided/overlay copies to turn ON the delivery flapper solenoid (SL2), thereby driving the
delivery flapper and, as a result, sending copy paper to the holding tray.
The cleaning belt drive solenoid (SL14) is used to trigger the external delivery sensor
(PS10).
Number of Activations (SL14)
• twice for large-size copy
• once for small-size copy
Reference:
1. Heater
120V model
220/240 model : 1200 W (main)
2. Thermal switch: 240 ±10°C
COPYRIGHT © 1997 CANON INC.
: 790 W (main) + 410 W (sub)
CANON NP6045 REV. 1 MAR. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 6 FIXING SYSTEM

6-1