Canon iR8500 Service Manual page 45

CONTENTS
5.14 Duplexing Unit ........................ 5-72
5.14.1 Removing the Reversal
Motor ................................. 5-72
5.14.2 Removing the Lower Feed
Motor ................................. 5-73
5.15 Fixing Assembly ...................... 5-74
5.15.1 Removing the Main/
Sub Heater ......................... 5-74
5.15.2 Mounting the Main/
Sub Heater ......................... 5-75
5.15.3 Removing the Thermal
Switch ................................ 5-75
5.15.4 Removing the Main
Thermistor ......................... 5-77
5.15.5 Removing the Sub
Thermistor ......................... 5-79
5.15.6 Fixing Roller Assembly ..... 5-80
5.16 Delivery Assembly ................... 5-81
5.16.1 Removing the External
Delivery Roller .................. 5-81
5.16.2 Removing the Internal
Delivery Roller .................. 5-82
5.16.3 Removing the Delivery
Speed Switching Clutch .... 5-83
5.17 Paper Sensor ............................ 5-84
5.17.1 Removing the Claw Jam
Sensor ................................ 5-84
5.17.2 Removing the External
Delivery Sensor ................. 5-84
5.17.3 Removing the Internal
Delivery Sensor ................. 5-85
5.17.4 Removing the Reversal
Sensor ................................ 5-86
5.17.5 Removing the Fixing/
g
Cover ................................. 5-89
5.18.2 Removing the Inside Upper
Cover ................................. 5-90
5.18.3 Removing the Fixing/
Feeding Unit Cover ........... 5-91
5.18.4 Removing the Rear
Cover ................................. 5-91
xiv
5.19 Control panel ........................... 5-93
5.20 Fans .......................................... 5-98
5.21 Switches ................................. 5-110
..... 5-87
..... 5-88
5.22 PCBs ...................................... 5-113
COPYRIGHT© 2001 CANON INC.
5.19.1 Removing the Control
Panel .................................. 5-93
5.19.2 Removing the Control
Panel Controller (CPU)
PCB and the Control Panel In-
verter PCB ......................... 5-95
5.19.3 Removing the Control
Panel PCB and the LCD
Panel .................................. 5-96
5.20.1 Removing the Laser Driver
Cooling Fan ....................... 5-98
5.20.2 Removing the Curl-Reducing
Fan ................................... 5-100
5.20.3 Removing the Power
Supply Cooling Fan 1 ...... 5-101
5.20.4 Removing the Power
Supply Cooing Fan 2 ....... 5-102
5.20.5 Removing the Separation
Fan ................................... 5-102
5.20.6 Developing Assembly
Fan ................................... 5-104
5.20.7 System Fan ...................... 5-105
5.20.8 Delivery Anti-Adhesion
Fan ................................... 5-106
5.20.9 Removing the Drum Drive
Assembly ......................... 5-106
5.20.10 Removing the Cassette
Pickup Drive Assembly ... 5-109
5.21.1 Removing the Cover
Switch (door switch)
Assembly ......................... 5-110
5.21.2 Removing the Manual
Tray Switch Assembly ..... 5-111
5.21.3 Removing the Drum
Heater Switch
Assembly ......................... 5-112
5.22.1 DC Controller PCB ......... 5-113
5.22.2 After Replacing the DC
Controller PCB ................ 5-113
5.22.3 Removing the Differential
PCB .................................. 5-113
CANON iR8500 REV.0 MAR. 2001