Contents
4.1.2
Basic Operation (DADF) ..........................................................................................................................................4- 2
4.1.3
Original Detection ....................................................................................................................................................4- 4
4.2
Detection Jams........................................................................................................................................... 4- 5
4.2.1
Jam Detection ..........................................................................................................................................................4- 5
4.3
ADF/DADF ................................................................................................................................................. 4- 6
4.3.1
Pick-up Roller...........................................................................................................................................................4- 6
4.3.1.1
Removing the ADF Pickup Roller ............................................................................................................................................ 4- 6
4.3.1.2
Removing the DADF Pickup Roller Unit .................................................................................................................................. 4- 6
4.3.2
ADF Motor................................................................................................................................................................4- 8
4.3.2.1
Preparation for Removing the ADF/DADF Motor..................................................................................................................... 4- 8
4.3.2.2
Removing the ADF Motor ........................................................................................................................................................ 4- 8
4.3.2.3
Removing the DADF Motor...................................................................................................................................................... 4- 9
4.3.3
Separation Pad ......................................................................................................................................................4- 12
4.3.3.1
Removing the ADF Separation Pad....................................................................................................................................... 4- 12
4.3.3.2
Removing the DADF Separation Pad .................................................................................................................................... 4- 12
Chapter 5
Laser Exposure
5.1
Overview/Configuration .............................................................................................................................. 5- 1
5.1.1
Overview ..................................................................................................................................................................5- 1
5.2
Controlling the Laser Activation Timing ...................................................................................................... 5- 2
5.2.1
Laser ON / OFF Control...........................................................................................................................................5- 2
5.3
Controlling the Intensity of Laser Light ....................................................................................................... 5- 2
5.3.1
Auto Photoelectric Current Control (APC) ...............................................................................................................5- 2
5.4
Controlling the Laser Scanner Motor.......................................................................................................... 5- 4
5.4.1
Overview ..................................................................................................................................................................5- 4
5.4.2
Scanner Motor Speed Control .................................................................................................................................5- 4
5.4.3
Detection of Fault of the Scanner Motor ..................................................................................................................5- 4
5.5
Parts Replacement Procedure ................................................................................................................... 5- 5
5.5.1
Laser/Scanner Unit ..................................................................................................................................................5- 5
5.5.1.1
Preparation for Removing the Laser Scanner Unit .................................................................................................................. 5- 5
5.5.1.2
Removing the Laser Scanner Unit ........................................................................................................................................... 5- 5
Chapter 6
Image Formation
6.1
Overview/Configuration .............................................................................................................................. 6- 1
6.1.1
Configuration............................................................................................................................................................6- 1
6.1.2
Print Process............................................................................................................................................................6- 1
6.2
Driving and Controlling the High-Voltage System ...................................................................................... 6- 2
6.2.1
Generation of Transfer Charging Bias .....................................................................................................................6- 2
6.3
Toner Cartridge .......................................................................................................................................... 6- 3
6.3.1
Toner Level Detection..............................................................................................................................................6- 3
6.4
Parts Replacement Procedure ................................................................................................................... 6- 4
6.4.1
Transfer Charging Roller..........................................................................................................................................6- 4
6.4.1.1
Removing the Transfer Charging Roller .................................................................................................................................. 6- 4
Chapter 7
Pickup and Feed System
7.1
Overview/Configuration .............................................................................................................................. 7- 1
7.1.1
Overview ..................................................................................................................................................................7- 1
7.2
Other Control .............................................................................................................................................. 7- 2
7.2.1
Overview ..................................................................................................................................................................7- 2
7.3
Detection Jams........................................................................................................................................... 7- 3
7.3.1
Jam Detection Outline..............................................................................................................................................7- 3
7.3.1.1
Overview .................................................................................................................................................................................. 7- 3
7.3.2
Delay Jams ..............................................................................................................................................................7- 3
7.3.2.1
Pickup Delay Jam .................................................................................................................................................................... 7- 3
Summary of Contents for i-SENSYS MF4300dn
Page 1: ...Aug 22 2008 Service Manual MF4300 Series ...
Page 2: ......
Page 6: ......
Page 12: ...Contents 15 1 1 Solvents Lubricants Table 15 1 ...
Page 13: ...Chapter 1 Introduction ...
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Page 33: ...Chapter 2 Basic Operation ...
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Page 39: ...Chapter 3 Original Exposure System ...
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Page 44: ...Chapter 3 3 2 F 3 1 ...
Page 49: ...Chapter 4 Original Feeding System ...
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Page 55: ...Chapter 4 4 3 F 4 6 ...
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Page 67: ...Chapter 5 Laser Exposure ...
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Page 73: ...Chapter 5 5 3 ...
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Page 77: ...Chapter 6 Image Formation ...
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Page 85: ...Chapter 7 Pickup and Feed System ...
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Page 97: ...Chapter 8 Fixing System ...
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Page 109: ...Chapter 9 External and Controls ...
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Page 121: ...Chapter 10 Maintenance and Inspection ...
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Page 129: ...Chapter 11 Measurement and Adjustments ...
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Page 135: ...Chapter 12 Correcting Faulty Images ...
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Page 144: ...Chapter 12 12 6 2 DCNT PCB 3 Power supply PCB 4 High voltage PCB SW301 Interlock switch ...
Page 145: ...Chapter 13 Error Code ...
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Page 147: ...Contents Contents 13 1 Error Code 13 1 13 1 1 Error Code Outline 13 1 13 1 2 Error Code 13 1 ...
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Page 153: ...Chapter 14 Service Mode ...
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Page 156: ...Contents 14 3 2 3 Sensor test 14 16 14 3 2 4 Key test 14 16 ...
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Page 175: ...Chapter 15 Service Tools ...
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Page 177: ...Contents Contents 15 1 Service Tools 15 1 15 1 1 Solvents Lubricants Table 15 1 ...
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Page 181: ...Aug 22 2008 ...
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