Canon NP-2020 - Features

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Features2
Specifications3
Type3
Construction3
Performance4
Others5
Fixed Reproduction Ratio6
Copy Speed6
Paper Size7
Names of Parts8
External View8
Cross Sectional View9
Operation11
Control Panel11
Size11
Making Copies13
Using the Manual Feed Tray13
Making Two Sided Copies13
Making Overlay Copies14
Using the COPY DENSITY Correction Lever14
Replacing the CT Unit14
Auto-Start15
Warnings and Actions to Take16
JAM Indicator16
ADD Paper Indicator17
Using the Multifeeder Tray17
Add Toner Indicator18
Control Card Indicator18
CT Unit18
Black Developing Assembly18
Routine Work by the User19
Image Formation Process20
Formation of Electrostatic Latent Image21
Pre-Conditioning Exposure21
Primary Corona Exposure22
Image Exposure22
Development22
Transfer23
Separation23
Drum Cleaning24
Auxiliary Processes25
Blank Exposure Mechanism25
Ozone Filter25
Basic Mechanisms26
Functional Construction26
Electrical Circuitry27
Microprocessors27
Lsi27
Inputs to DC Controller29
Outputs from DC Controller33
Basic Sequence36
Exposure System38
Varying the Reproduction Ratio38
Lens Drive System39
Basic Sequence for Lens Drive System41
Lens Drive Motor Circuit42
Scanner Drive System43
Relationship between Sensor and Signals44
Basic Sequence for Scanner44
Movement of Scanner in Page Separation Mode45
Document Size Identification46
Mechanism46
Document Identification Timing47
Identification of Document Size48
Image Formation System49
Basic Sequence of Image Formation50
Controlling the Scanning Lamp51
Copy Density Correction Lever52
Controlling the Primary/Transfer Corona Current53
Turning the Grid Bias on and off54
Controlling the Development Bias55
Controlling the DC Bias Voltage Level56
Control Sequence for Development Bias57
Measuring the Document Density58
Reading the AE Sensor Output58
Adjustment59
Adjusting the AE Slope60
Adjusting PCB60
Developing Assembly and Drum Cleaning Unit61
Monitoring the Toner Level61
Torque Limiter61
Blank Control62
Controlling the Blank Exposure Shutter62
Controlling the Transfer Corona Wire Cleaning Mechanism63
Cleaning Mechanism63
Pick-Up/Feed System64
Contact Sensor64
DC Controller PCB65
Sequence for Pick-Up/Feed System66
Manual Feed Pick up67
Using the Multifeeder68
Sequence of Operations69
Identifying the Cassette Size70
Fixing Assembly and Delivery Assembly71
Controlling the Fixing Roller Temperature71
Oil Application Roller72
Error Detection Circuit74
Detection by Hardware76
Error Code77
Jam Detection78
Pick-Up Delay Jam79
Separation Delay Jam79
Separation Stationary Jam80
Delivery Delay Jam80
Delivery Stationary Jam81
Power Supply82
DC Power Supply82
Protection Mechanism for Power Supply Circuit82
DC Power Supply for Options83
Service Modes85
Using the Service Mode86
Self Diagnostic Mechanism87
Externals89
External Covers89
Rear Cover90
Inside Covers91
Lower Front Cover91
Left Cover91
Right Cover92
Copyboard Cover93
Fans93
Replacing the Contact Sheet93
Scanner Cooling Fan94
Exhaust Fan94
Feeder Fan94
Drive System95
Lens Drive Unit95
Lens Cable96
Scanner Drive Unit97
Detaching the Scanner Cable97
Attaching the Scanner Cable97
Adjusting the Scanner Drive Cable98
Adjusting the Mirror Position98
Lubrication99
Main Motor Unit100
Removing the Main Motor100
Mounting the Main Motor100
Feed System101
Pick up Unit101
Pick up Roller101
Positioning the Pick up Roller101
Registration Roller102
Feeder Rollers103
Manual Feed Pick up Roller103
Detaching the Multifeeder104
Detaching the Multifeeder Separation Pad104
Detaching the Multifeeder Pick up Roller105
Feeder Unit106
Feeder Belt107
Illuminating Unit108
Removing the Scanning Lamp108
Removing the Thermal Fuse108
Blank Exposure Unit109
Pre-Exposure PCB109
Using the Mirror Cleaning Tool110
Cleaning the No. 5 Mirror110
Cleaning the No. 6 Mirror110
Corona System111
Drum Unit111
Removing the Drum Unit111
Cleaning111
Primary and Transfer Corona Units112
Primary Corona Unit113
Transfer Corona Unit113
Mounting the Transfer Corona Unit114
Development System115
Developing Assembly115
Removing the Blade, Developing Cylinder and Side Seal115
Mounting the Side Seal and Blade117
Fixing System118
Fixing Assembly118
Removing the Fixing Assembly118
Fixing Heater119
Upper Fixing Roller119
Lower Fixing Roller120
Mounting the Heater and Upper Fixing Roller120
Adjusting the Nip121
Mounting the Thermistor121
Tightening the Pressure Nut121
Mounting the Thermal Switch122
Position of the Paper Guide122
Removing the Upper Separation Claw123
Mounting the Upper Separation Claw123
Removing the Lower Separation Claw123
Location124
Unpacking and Installing the Copiter125
Mounting the Drum128
Checking the Operation129
Adding Toner130
Checking the Image131
Setting the Cassette Size132
Replacing the Cassette Spring135
Removing the Pick-Up Roller136
Setting the CT Unit137
Relocating the Copier138
Setting Control Card V139
Attaching the Document Holder141
Periodically Replaced Parts142
Consumables143
Periodical Servicing144
Periodical Servicing Chart145
Signals and Abbreviations147
General Circuit Diagram149
Wiring Diagram151

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