Canon imageRUNNER 2270, Service Manual

Page: 428 / 994

Contents
Contents
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
10.4.1 Power Supply .................................................................................................. 10-9
10.4.2 Rated Output of the DC Power Supply PCB ................................................ 10-14
10.4.3 Protection Function ....................................................................................... 10-17
10.4.4 Backup Battery ..............................................................................................10-16
10.4.5 Energy-Saving Function ............................................................................... 10-17
10.5 Parts Replacement Procedure .............................................................................. 10-20
10.5.1 Main Drive Assembly ................................................................................... 10-20
10.5.2 Power Supply Unit ........................................................................................ 10-23
10.5.3 Control Panel ................................................................................................. 10-25
10.5.4 Control Panel LCD Unit ............................................................................... 10-26
10.5.5 Removing the DC Controller PCB ................................................................ 10-28
10.5.6 Control Panel Inverter PCB ..........................................................................10-29
10.5.7 Control Panel Key Switch PCB .................................................................... 10-30
10.5.8 Control Panel CPU PCB ............................................................................... 10-31
10.5.9 All Night Power Supply PCB ....................................................................... 10-32
10.5.10 Controller Power Supply PCB .................................................................... 10-32
10.5.11 Option Power Supply PCB ......................................................................... 10-34
10.5.12 High-Voltage PCB ...................................................................................... 10-35
10.5.13 Exhaust Fan ................................................................................................. 10-47