Table of Contents
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Contents
9.8 Transfer Unit ..................................................................................................... 9-46
9.8.1 Outline of the Transfer Unit ................................................................................... 9-46
9.8.1.1 Outline of the Transfer Unit .............................................................................................. 9-46
9.8.1.2 Transfer Unit Drive Control............................................................................................... 9-47
9.8.2 Controlling the Transfer Bias ................................................................................. 9-48
9.8.2.1 Transfer Bias Control......................................................................................................... 9-48
9.8.3 Cleaning .................................................................................................................... 9-50
9.8.3.1 Intermediate Transfer Belt (ITB) ...................................................................................... 9-50
9.8.3.2 Secondary External Roller ................................................................................................ 9-51
9.8.3.3 Waste Toner Collection Mechanism ............................................................................... 9-51
9.8.4 Separation Mechanism .......................................................................................... 9-52
9.8.4.1 Separation ........................................................................................................................... 9-52
9.9 Parts Replacement Procedure....................................................................... 9-54
9.9.1 Drum ITB Motor ....................................................................................................... 9-55
9.9.2 Drum Drive Unit ....................................................................................................... 9-56
9.9.3 Drive Roller .............................................................................................................. 9-57
9.9.4 Developing Motor (Bk/Y/M/C) ............................................................................... 9-58
9.9.5 Secondary Transfer Unit ........................................................................................ 9-59
9.9.6 Intermediate Transfer Unit ..................................................................................... 9-60
9.9.7 Transfer Cleaning Unit ........................................................................................... 9-62
9.9.8 Intermediate Transfer Belt ..................................................................................... 9-62
9.9.9 Intermediate Transfer Belt Tension Roller .......................................................... 9-66
9.9.10 Primary Transfer Roller ........................................................................................ 9-66
9.9.11 Secondary Transfer External Roller ................................................................... 9-67
9.9.12 Secondary Transfer Internal Roller .................................................................... 9-69
9.9.13 Toner Container Drive Unit .................................................................................. 9-70
9.9.14 Waste Toner Detection PCB ............................................................................... 9-71
9.9.15 Feedscrew Rotation Sensor ................................................................................ 9-73
9.9.16 Tone Container Motor .......................................................................................... 9-75
9.9.17 Waste Toner Feedscrew Case ........................................................................... 9-77
9.9.18 Pattern Reader Unit .............................................................................................. 9-79
9.9.19 Auto Registration Sensor PCB ............................................................................ 9-80
9.9.20 SALT Sensor .......................................................................................................... 9-81
Chapter 10 Pickup/Feeding System
10.1 Construction.................................................................................................... 10-1
10.1.1 Specifications, Control Mechanisms, and Functions....................................... 10-1
10.1.2 Arrangement of he Units ...................................................................................... 10-2
10.1.3 Arrangement of Rollers ........................................................................................ 10-3
10.1.4 Diagram of the Paper Paths ................................................................................ 10-4
10.1.5 Arrangement of Sensors ...................................................................................... 10-5
10.1.6 Arrangement of the Clutches and Solenoids .................................................... 10-6
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