Service manual

COPYRIGHT © 1997 CANON INC. CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 6 FIXING SYSTEM
I. OPERATION.......................................6-1
A. Outline ...........................................6-1
II. CONTROLLING THE FIXING
TEMPERATURE.................................6-2
A. Controlling the Area of Heating
(fixing roller)...................................6-2
B. Controlling the Activation and the
Temperature of the Fixing Roller
(continuous copying) .....................6-3
1. Outline ......................................6-3
2. Controlling Period
of Activation..............................6-3
3. Controlling the Control
Temperature .............................6-4
4. Controlling the temperature
during Pre-heat mode ..............6-4
C. Protection Mechanism...................6-5
D. Driving the Cleaning Belt...............6-7
III. DELIVERY ASSEMBLY......................6-8
A. Outline ...........................................6-8
B. Controlling the Delivery Motor.......6-9
1. Outline ......................................6-9
2. Operation..................................6-10
IV. DISASSEMBLY AND ASSEMBLY......6-11
A. Fixing Assembly ............................6-11
1. Construction .............................6-11
2. Removing the Fixing
Assembly..................................6-12
3. Removing the Fixing Cleaning
Belt ...........................................6-15
4. Installing the Fixing Cleaning
Belt ...........................................6-16
5. Replacing the oil sheet.............6-17
6. Removing the Fixing Heater.....6-18
7. Removing the Fixing Roller......6-21
8. Installing the Upper Fixing
Roller and the Heater...............6-25
9. Adjusting the Nip (tightening
the pressure adjusting nut).......6-27
10.Installing the Thermistor...........6-28
11.Installing the Thermal Switch ...6-28
12.Position of the Paper Guide.....6-29
13.Positioning the Cleaning Belt
Solenoid ...................................6-29
B. Delivery Assembly.........................6-30
1. Removing the Delivery
Assembly..................................6-30
2. Removing the Upper
Separation Claws .....................6-32
3. Removing the Lower
Separation Claws .....................6-33
4. Removing the Delivery Motor...6-34
7. Adjusting the Pressure of the
Separation Roller......................5-53
8. Positioning the Pick-Up Assembly
Pick-Up Roller Releasing
Solenoid (SL1, SL2) .................5-53
9. Releasing the Lifter ..................5-54
10.Adjusting the Registration
(left/right) ..................................5-55
B. Multifeeder Assembly ....................5-56
1. Removing the Multifeeder
Assembly..................................5-56
2. Removing the Multifeeder Pick-
Up Roller/Separation Pad ........5-56
3. Adjusting the Pressure on the
Separation Pad.........................5-58
4. Adjusting the Left/Right
Registration ..............................5-58
5. Adjusting the Paper Guide Plate
Cam (multifeeder assembly) ....5-59
6. Routing the Timing Belt
(multifeeder assembly).............5-59
C. Registration Roller Assembly ........5-60
1. Removing the Registration
Roller ........................................5-60
D. Feeding Assembly.........................5-62
1. Removing the Feeding
Assembly..................................5-62
2. Removing the Feeding Belt......5-63
3. Removing the Feeding Fan......5-67
E. Lower Feeding Assembly..............5-68
1. Removing the Lower Feeding
Assembly..................................5-68
2. Attaching the Lower Feeding
Assembly..................................5-70
3. Removing the Set-Back Roller ..5-71
4. Removing the Lower Feeder
Outlet Roller .............................5-72
5. Removing the Lower Feeder
Inlet Roller ................................5-73