Canon imageRUNNER 2270 Service Manual page 12

Contents
Chapter 9 Fixing System
9.1 Construction ............................................................................................................... 9-1
9.1.1 Specifications, Control Mechanisms, and Functions .......................................... 9-1
9.1.2 Major Components.............................................................................................. 9-2
9.2 Basic Sequence .......................................................................................................... 9-3
9.2.1 Power-On Sequence ............................................................................................ 9-3
9.2.2 Down Sequence................................................................................................... 9-3
9.3 Various Control Mechanisms .................................................................................... 9-4
9.3.1 Controlling the Speed of the Fixing Film ..........................................................9-4
9.3.2 Controlling the Fixing Film Temperature ...........................................................9-5
9.3.3 Cleaning ..............................................................................................................9-8
9.3.4 Detecting the Passage of Paper ...........................................................................9-9
9.4 Protective Functions................................................................................................. 9-10
9.4.1 Protective Functions.......................................................................................... 9-10
9.4.2 Detecting an Error ............................................................................................. 9-11
9.5 Parts Replacement Procedure .................................................................................. 9-13
9.5.1 Fixing Unit ........................................................................................................9-13
9.5.2 Pressure Roller ..................................................................................................9-16
9.5.3 Cleaning Roller .................................................................................................9-21
9.5.4 Fixing Film ........................................................................................................9-22
9.5.5 Internal Delivery Sensor ...................................................................................9-24
9.5.6 Fixing Film Sensor ............................................................................................9-27
Chapter 10 External and Controls
10.1 Control Panel ......................................................................................................... 10-1
10.1.1 Overview ......................................................................................................... 10-1
10.1.2 LCD Indication Processing ............................................................................. 10-2
10.1.3 Adjustment of the LCD Contact ..................................................................... 10-2
10.1.4 Functions of the Control Panel CPU............................................................... 10-2
10.2 Counters ................................................................................................................. 10-3
10.2.1 Overview ......................................................................................................... 10-3
10.2.2 Timing of Increasing the Count ...................................................................... 10-5
10.3 Fans ........................................................................................................................ 10-6
10.3.1 Overview ......................................................................................................... 10-6
10.3.2 2-Speed Control .............................................................................................. 10-7
10.3.3 Sequence of Operation .................................................................................... 10-7
10.4 Power Supply System ............................................................................................ 10-9