Chapter 6 Fixing System; Operation; Outline - Canon NP6330 Service Manual

I. OPERATION
A. Outline
The upper roller, lower roller, and delivery roller 1 are driven by the main motor (M1),
and the delivery roller 2 is driven by the delivery motor (M6).
The copier's upper roller is heated by two fixing heaters (H1 : 750 W (220 / 240 V) /
700 W (120 V) ; H2 : 640 W (220 / 240 V) / 600 W (120 V)), and its surface temperature
is monitored by a thermistor (TH1).
The DC controller turns on and off the fixing heater drive command (MHRD, SHRD)
based on the fixing temperature signal (TH1, analog) from the thermistor.
The control temperature and the area of heating during copying are varied according
to the following:
• Copy paper size (width)
• Number of copies (continuous copying)
Delivery
roller 1
Delivery
roller 2
COPYRIGHT © 1997 CANON INC.
Download Service Manual And Resetter Printer at http://printer1.blogspot.com
SL4
Cleaning belt solenoid
One-way
clutch
Cleaning belt
Cleaning belt
guide plate
Thermoswitch
(TSW)
Thermistor (TH1)
H1
H2
Fixing
roller
Figure 6-101
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 6 FIXING SYSTEM

cleaning belt solenoid drive command (CBSD
fixing thermistor signal (TH1)
+24VB
power switch off command (PWOFF
AC power
SSR
)
*
DC
controller
PCB
)
*
main heater drive
command (MHRD)
sub heater drive
command (SHRD)
main SSR drive
signal (MSSRD)
sub SSR drive
signal (SSSRD)
6-1