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NP-2020
Service manual
Canon NP-2020 Service Manual
For 220/240v
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Also See for NP-2020
:
Service manual
(207 pages)
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Table Of Contents
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Contents
Table of Contents
Bookmarks
Table of Contents
Features
Specifications
Type
Construction
Performance
Others
Fixed Reproduction Ratio
Copy Speed
Paper Size
Names of Parts
External View
Cross Sectional View
Operation
Control Panel
Size
Making Copies
Using the Manual Feed Tray
Making Two Sided Copies
Making Overlay Copies
Using the COPY DENSITY Correction Lever
Replacing the CT Unit
Auto-Start
Warnings and Actions to Take
JAM Indicator
ADD Paper Indicator
Using the Multifeeder Tray
Add Toner Indicator
Control Card Indicator
CT Unit
Black Developing Assembly
Routine Work by the User
Image Formation Process
Formation of Electrostatic Latent Image
Pre-Conditioning Exposure
Primary Corona Exposure
Image Exposure
Development
Transfer
Separation
Drum Cleaning
Auxiliary Processes
Blank Exposure Mechanism
Ozone Filter
Basic Mechanisms
Functional Construction
Electrical Circuitry
Microprocessors
Lsi
Inputs to DC Controller
Outputs from DC Controller
Basic Sequence
Exposure System
Varying the Reproduction Ratio
Lens Drive System
Basic Sequence for Lens Drive System
Lens Drive Motor Circuit
Scanner Drive System
Relationship between Sensor and Signals
Basic Sequence for Scanner
Movement of Scanner in Page Separation Mode
Document Size Identification
Mechanism
Document Identification Timing
Identification of Document Size
Image Formation System
Basic Sequence of Image Formation
Controlling the Scanning Lamp
Copy Density Correction Lever
Controlling the Primary/Transfer Corona Current
Turning the Grid Bias on and off
Controlling the Development Bias
Controlling the DC Bias Voltage Level
Control Sequence for Development Bias
Measuring the Document Density
Reading the AE Sensor Output
Adjustment
Adjusting the AE Slope
Adjusting PCB
Developing Assembly and Drum Cleaning Unit
Monitoring the Toner Level
Torque Limiter
Blank Control
Controlling the Blank Exposure Shutter
Controlling the Transfer Corona Wire Cleaning Mechanism
Cleaning Mechanism
Pick-Up/Feed System
Contact Sensor
DC Controller PCB
Sequence for Pick-Up/Feed System
Manual Feed Pick up
Using the Multifeeder
Sequence of Operations
Identifying the Cassette Size
Fixing Assembly and Delivery Assembly
Controlling the Fixing Roller Temperature
Oil Application Roller
Error Detection Circuit
Detection by Hardware
Error Code
Jam Detection
Pick-Up Delay Jam
Separation Delay Jam
Separation Stationary Jam
Delivery Delay Jam
Delivery Stationary Jam
Power Supply
DC Power Supply
Protection Mechanism for Power Supply Circuit
DC Power Supply for Options
Service Modes
Using the Service Mode
Self Diagnostic Mechanism
Externals
External Covers
Rear Cover
Inside Covers
Lower Front Cover
Left Cover
Right Cover
Copyboard Cover
Fans
Replacing the Contact Sheet
Scanner Cooling Fan
Exhaust Fan
Feeder Fan
Drive System
Lens Drive Unit
Lens Cable
Scanner Drive Unit
Detaching the Scanner Cable
Attaching the Scanner Cable
Adjusting the Scanner Drive Cable
Adjusting the Mirror Position
Lubrication
Main Motor Unit
Removing the Main Motor
Mounting the Main Motor
Feed System
Pick up Unit
Pick up Roller
Positioning the Pick up Roller
Registration Roller
Feeder Rollers
Manual Feed Pick up Roller
Detaching the Multifeeder
Detaching the Multifeeder Separation Pad
Detaching the Multifeeder Pick up Roller
Feeder Unit
Feeder Belt
Illuminating Unit
Removing the Scanning Lamp
Removing the Thermal Fuse
Blank Exposure Unit
Pre-Exposure PCB
Using the Mirror Cleaning Tool
Cleaning the No. 5 Mirror
Cleaning the No. 6 Mirror
Corona System
Drum Unit
Removing the Drum Unit
Cleaning
Primary and Transfer Corona Units
Primary Corona Unit
Transfer Corona Unit
Mounting the Transfer Corona Unit
Development System
Developing Assembly
Removing the Blade, Developing Cylinder and Side Seal
Mounting the Side Seal and Blade
Fixing System
Fixing Assembly
Removing the Fixing Assembly
Fixing Heater
Upper Fixing Roller
Lower Fixing Roller
Mounting the Heater and Upper Fixing Roller
Adjusting the Nip
Mounting the Thermistor
Tightening the Pressure Nut
Mounting the Thermal Switch
Position of the Paper Guide
Removing the Upper Separation Claw
Mounting the Upper Separation Claw
Removing the Lower Separation Claw
Location
Unpacking and Installing the Copiter
Mounting the Drum
Checking the Operation
Adding Toner
Checking the Image
Setting the Cassette Size
Replacing the Cassette Spring
Removing the Pick-Up Roller
Setting the CT Unit
Relocating the Copier
Setting Control Card V
Attaching the Document Holder
Periodically Replaced Parts
Consumables
Periodical Servicing
Periodical Servicing Chart
Signals and Abbreviations
General Circuit Diagram
Wiring Diagram
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