2.4.2.5 Fixing bias generation............................................................................................................................................................ 2- 13

2.4.2.6 Cartridge presence detection................................................................................................................................................. 2- 13

2.5 PICKUP AND FEEDING SYSTEM........................................................................................................... 2- 13

2.5.1 Overview/Configuration..........................................................................................................................................2- 13

2.5.1.1 Outline.................................................................................................................................................................................... 2- 13

2.5.2 Detecting Jams ......................................................................................................................................................2- 14

2.5.2.1 Jam Detection Outline............................................................................................................................................................ 2- 14

2.5.2.2 Delay Jams ............................................................................................................................................................................ 2- 15

2.5.2.3 Stationary Jams ..................................................................................................................................................................... 2- 15

2.5.2.4 Other Jams ............................................................................................................................................................................ 2- 15

2.5.3 Cassette Pickup .....................................................................................................................................................2- 15

2.5.3.1 Cassette pick-up .................................................................................................................................................................... 2- 15

2.5.4 Multi-purpose Pickup .............................................................................................................................................2- 16

2.5.4.1 Manual Fees pick-ip............................................................................................................................................................... 2- 16

2.5.5 Duplex Feeding......................................................................................................................................................2- 16

2.5.5.1 Outline.................................................................................................................................................................................... 2- 16

2.5.5.2 Operation ............................................................................................................................................................................... 2- 16

2.6 EXTERNAL AND CONTROLS SYSTEM ................................................................................................. 2- 17

2.6.1 Fan.........................................................................................................................................................................2- 17

2.6.1.1 Fan motor control................................................................................................................................................................... 2- 17

2.6.2 Power Supply.........................................................................................................................................................2- 17

2.6.2.1 Power Supply......................................................................................................................................................................... 2- 17

2.6.2.2 Protective Functions .............................................................................................................................................................. 2- 18

2.7 ENGINE CONTROL SYSTEM ................................................................................................................. 2- 19

2.7.1 Video Controller .....................................................................................................................................................2- 19

2.7.1.1 Outline.................................................................................................................................................................................... 2- 19

2.7.1.2 Outline of Operation by Block ................................................................................................................................................ 2- 19

2.7.1.3 Overview ................................................................................................................................................................................ 2- 20

2.7.1.4 Outline of Operation by Block ................................................................................................................................................ 2- 20

2.7.2 Engine Controller ...................................................................................................................................................2- 21

2.7.2.1 Outline.................................................................................................................................................................................... 2- 21

2.8 FIXING UNIT/DELIVERY SYSTEM.......................................................................................................... 2- 23

2.8.1 Overview/Configuration..........................................................................................................................................2- 23

2.8.1.1 Outline.................................................................................................................................................................................... 2- 23

2.8.2 Various Control Mechanisms .................................................................................................................................2- 24

2.8.2.1 Fixing Temperature Control ................................................................................................................................................... 2- 24

2.8.2.2 Protective Functions .............................................................................................................................................................. 2- 25

Chapter 3 DISASSEMBLY AND ASSEMBLY

3.1 EXTERNAL AND CONTROLS SYSTEM ................................................................................................... 3- 1

3.1.1 Rear Cover...............................................................................................................................................................3- 1

3.1.1.1 Preparation for removing the rear cover unit ........................................................................................................................... 3- 1

3.1.1.2 Removing the rear cover unit................................................................................................................................................... 3- 1

3.1.2 Right Cover ..............................................................................................................................................................3- 1

3.1.2.1 Detaching the right cover ......................................................................................................................................................... 3- 1

3.1.3 Left Cover ................................................................................................................................................................3- 2

3.1.3.1 Detaching the left cover ........................................................................................................................................................... 3- 2

3.1.4 Upper Cover.............................................................................................................................................................3- 3

3.1.4.1 Preparation for detaching the upper cover unit........................................................................................................................ 3- 3

3.1.4.2 Detaching the upper cover....................................................................................................................................................... 3- 3

3.1.4.3 Detaching the upper cover....................................................................................................................................................... 3- 3

3.1.5 Front Cover ..............................................................................................................................................................3- 4

3.1.5.1 Preparation for detaching the front cover unit.......................................................................................................................... 3- 4

3.1.5.2 Detaching the front cover unit .................................................................................................................................................. 3- 4

3.1.6 Main Drive Unit ........................................................................................................................................................3- 5

3.1.6.1 Preparation for removing the main drive assembly.................................................................................................................. 3- 5

3.1.6.2 Removing the main drive assembly ......................................................................................................................................... 3- 5

3.1.7 Duplexing Drive Unit ................................................................................................................................................3- 6

Table of Contents