Canon PIXMA MG3220 series Service Manual Page 59
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- Table of contents
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Image-formation system
Laser printing requires the interaction of several technologies, including electronics, optics, and
electrophotographics, to produce a printed page. Each process functions independently and must be
coordinated with the other product processes. Image formation consists of the following five processes:
●
Electrostatic latent-image formation
●
Developing
●
Transfer
●
Fusing
●
Drum cleaning
These five processes contain seven steps, which are shown in
Figure 4-9 Image-formation system
on page 43 and described in the following sections.
Figure 4-9 Image-formation system
Step 1: Primary charging
DC and AC biases are applied to the primary charging roller, which transfers a uniform negative potential
to the photosensitive drum.
Figure 4-10 Primary charging
ENWW Image-formation system 43
- HP LaserJet M1120 MFP Series 1
- Table of contents 5
- List of tables 11
- List of figures 13
- 1 Product information 17
- Table 1-1 Product guides 18
- Product comparison 19
- Product features 20
- Product walkaround 21
- Software description 23
- Advanced installation 24
- Macintosh software 24
- Software for Windows 25
- Software for Macintosh 26
- Uninstall software 27
- Media specifications 28
- 2 Installation 31
- Site preparations 32
- Minimum system requirements 33
- What was in the box 34
- Install input devices 35
- Install supplies 37
- 3 Maintenance 39
- Manage supplies 40
- Replace supplies 41
- HP policy on non-HP supplies 42
- HP fraud hotline 43
- Clean the product 44
- Clean the paper path 45
- Management tools 46
- Features 47
- 4 Operational theory 49
- Basic operation 50
- ENWW Basic operation 35 51
- Scanner functions 52
- Scanner operation 53
- 789101112 54
- Engine control system 55
- Laser/scanner system 57
- Pickup/feed/delivery system 58
- Image-formation system 59
- 5 Removal and replacement 63
- Introduction 64
- Before performing service 65
- After performing service 66
- Post-service tests 67
- Parts removal order 68
- ENWW Scanner assembly 53 69
- ENWW Scanner assembly 55 71
- Scanner lid 72
- ENWW Scanner assembly 57 73
- Control-panel assembly 74
- ENWW Scanner assembly 59 75
- Scanner assembly 76
- (callout 4) 78
- Product base 81
- Separation pad 82
- ENWW Product base 67 83
- ENWW Product base 69 85
- Scanner cushions 86
- Media input tray 87
- Transfer roller 89
- Side covers 90
- Print-cartridge door 92
- Rear cover and fuser cover 93
- Front cover 95
- 5. Remove the front cover 96
- Formatter 97
- Power supply 98
- ENWW Product base 85 101
- Scanner support frame 102
- ENWW Product base 87 103
- Laser/scanner assembly 105
- ENWW Product base 91 107
- Main motor 109
- ENWW Product base 99 115
- Paper-pickup assembly 116
- ENWW Product base 101 117
- 6 Problem solve 121
- Problem-solving checklist 122
- Control-panel messages 124
- Critical error messages 125
- Clear jams 127
- Where to look for jams 128
- ENWW Clear jams 115 131
- Avoid repeated jams 133
- Print problems 134
- General print-quality issues 136
- ENWW Print problems 121 137
- ENWW Print problems 123 139
- Scan problems 140
- ENWW Scan problems 125 141
- Scan-quality problems 142
- Copy problems 143
- Media-handling problems 144
- ENWW Copy problems 129 145
- Performance problems 146
- Functional checks 147
- Perform other checks 148
- Heating element check 149
- High-voltage contacts check 149
- Service-mode functions 151
- Problem-solving tools 153
- Service menu 154
- Turn on archive print 155
- Problem-solving diagrams 156
- Interface ports 157
- Formatter connectors 158
- ECU connectors 159
- Solenoid and motor 160
- Figure 6-6 Rollers 161
- Figure 6-7 Sensors 162
- Major components 163
- PCAs (base unit) 164
- Circuit diagram 165
- Firmware updates 166
- Ordering information 168
- Supplies and hinge tool 168
- Whole-unit replacement 169
- 154 Chapter 7 Parts ENWW 170
- 156 Chapter 7 Parts ENWW 172
- Control-panel overlays 173
- 158 Chapter 7 Parts ENWW 174
- 160 Chapter 7 Parts ENWW 176
- 162 Chapter 7 Parts ENWW 178
- Types of screws 179
- Scanner assemblies 180
- ENWW Scanner assemblies 165 181
- Assemblies 182
- ENWW Assemblies 167 183
- 168 Chapter 7 Parts ENWW 184
- Internal components (1 of 3) 186
- 172 Chapter 7 Parts ENWW 188
- 174 Chapter 7 Parts ENWW 190
- Alphabetical parts list 192
- Numerical parts list 194
- ENWW Numerical parts list 179 195
- 180 Chapter 7 Parts ENWW 196
- A Service and support 197
- Customer support 200
- HP maintenance agreements 200
- B Specifications 201
- Power consumption 202
- Environmental specifications 203
- Acoustic emissions 203
- C Regulatory information 205
- FCC compliance 206
- Plastics 207
- HP LaserJet print supplies 207
- Non-US returns 208
- Declaration of conformity 210
- Safety statements 211
- Laser statement for Finland 212
- Substances table (China) 212
- 206 Index ENWW 222
- *CB537-90945* 224
- CB537-90945 224
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