Parts Replacement Procedure - Canon iR4570 Series Service Manual

Contents
10.1 Control Panel.................................................................................................................................................. 10-1
10.1.1 Overview ................................................................................................................................................. 10-1
10.1.2 Overview ................................................................................................................................................. 10-1
10.1.3 LCD Indication Processing ..................................................................................................................... 10-2
10.1.4 LCD Indication Processing ..................................................................................................................... 10-2
10.1.5 Adjustment of the LCD Contact.............................................................................................................. 10-2
10.1.6 Adjustment of the LCD Contact.............................................................................................................. 10-2
10.1.7 Functions of the Control Panel CPU ....................................................................................................... 10-3
10.1.8 Functions of the Control Panel CPU ....................................................................................................... 10-3
10.2 Counters.......................................................................................................................................................... 10-4
10.2.1 Overview ................................................................................................................................................. 10-4
10.2.2 Timing of Increasing the Count............................................................................................................... 10-5
10.3 Fans ................................................................................................................................................................ 10-7
10.3.1 Overview ................................................................................................................................................. 10-7
10.3.2 2-Speed Control....................................................................................................................................... 10-7
10.3.3 Sequence of Operation ............................................................................................................................ 10-8
10.4 Power Supply System..................................................................................................................................... 10-9
10.4.1 Power Supply .......................................................................................................................................... 10-9
10.4.1.1 Route of Power Inside the Printer Unit .......................................................................................... 10-9
10.4.1.2 Route of Power Inside the Printer Unit .......................................................................................... 10-10
10.4.1.3 Power Supply Route in the Reader Unit......................................................................................... 10-12
10.4.1.4 Timing of Supply to the Reader Unit ............................................................................................. 10-12
10.4.1.5 Connections to Various Accessories .............................................................................................. 10-13
10.4.1.6 Connections to Various Accessories .............................................................................................. 10-14
10.4.2 Rated Output of the DC Power Supply PCB......................................................................................... 10-15
10.4.2.1 Rated Output of the Printer Unit Power Supply PCB .................................................................... 10-15
10.4.2.2 Rated Output of the Controller Power Supply PCB....................................................................... 10-15
10.4.2.3 Rated Output of the Accessories Power Supply PCB .................................................................... 10-16
10.4.2.4 Rated Output of the All-Night Power Supply PCB........................................................................ 10-16
10.4.3 Protection Function ............................................................................................................................... 10-16
10.4.3.1 Protective Mechanisms................................................................................................................... 10-16
10.4.4 Backup Battery ...................................................................................................................................... 10-17
10.4.4.1 Backup Battery ............................................................................................................................... 10-17
10.4.5 Energy-Saving Function........................................................................................................................ 10-17
10.4.5.1 Overview ........................................................................................................................................ 10-17
10.4.5.2 Machine as Supplied with Power ................................................................................................... 10-18

10.5 Parts Replacement Procedure ....................................................................................................................... 10-20

10.5.1 Main Drive Assembly ........................................................................................................................... 10-20
10.5.1.1 Removing the Rear Cover .............................................................................................................. 10-20
10.5.1.2 Removing the Main Drive Assembly ............................................................................................. 10-20
10.5.1.3 Removing the Main Drive Assembly ............................................................................................. 10-21
10.5.2 Power Supply Unit ................................................................................................................................ 10-23
10.5.2.1 Removing the Rear Cover .............................................................................................................. 10-23
10.5.2.2 Removing the Left Cover (lower) .................................................................................................. 10-23
Contents