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Canon Manuals
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PC720
Service manual
Canon PC720 Service Manual
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Also See for PC720
:
Service manual
(200 pages)
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Table Of Contents
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Contents
Table of Contents
Bookmarks
Table of Contents
Introduction
Contents
General Description
Features
Specifications
Type
System
Performance
Others
Names of Parts
External View
Cross Section
Operations
Control Panel
Basic Copying Operations
Using Transparencies
If the Transparency Is Not Picked up Smoothly
Removing Jams
Adding Paper
Replacing the Cartridge
When to Replace the Cartridge
Using the Density Correction Switch
Cleaning
If Images Are Soiled
Frequent Jams
Copying Process
Image Formation
Outline
Static Latent Image Formation Block
Primary Charging
Image Exposure
Development
Transfer
Separation
Fixing
Drum Cleaning
Auxiliary Process
Side Blank Exposure
Operations and Timing
Basic Operation
Functional Construction
Electrical Circuitry
Inputs to the DC Controller
Outputs from the DC Controller
Main Motor Control Circuit
Operation
Basic Sequence of Operations
Copy Start Key after Power on
Copy Start Key on Immediately after Power on
Exposure System
Varying the Reproduction Ratio
Lens Drive System
Scanner Drive System
Relationship between the Scanner Sensor and Signals
Basic Sequence of Scanner Operations
Driving the Scanner Motor
Image Formation System
Sequence of Operations
Controlling the Scanning Lamp
Controlling the Scanning Lamp for Pre-Heating
Turning on and off the Scanning Lamp
Controlling the Intensity of the Scanning Lamp
Intensity Lower than the Specified Value
Controlling the Primary Charging Roller Bias
Turning on and off the DC/AC Bias
Controlling the DC Bias to a Specific Voltage
Switching the DC Bias Voltage Level
Controlling the Developing
Separation Static Eliminator Bias
Turning on and off the DC Component
Turning the AC Component on and off
Black Developing Assembly
Copy Density Adjusting Lever
Color Developing Assembly
Controlling the Transfer
Transfer Bias
Cleaning Bias
Reference Bias
Turning on and off the Transfer Roller Bias
Controlling the Transfer Bias to a Specific Voltage
Correcting the Voltage Level of the Transfer Bias
Switching the Polarity of the DC Bias
Measuring the Density of the Original
AE Measurement
AE Adjustment
Controlling the Side Blank Exposure
Pick-Up/Feeding System
DC Controller PCB
Controlling the Pick-Up Roller
Controlling the Feeding Mechanism
Controlling the Registration Roller
Pick up from the Cassette
Single Feeder Sequence
Pick up from the Multifeeder
Fixing and Delivery
Controlling the Temperature of the Fixing Heater
Controlling the Power Supply to the Fixing Heater
Correction the Variation in the Resistance of the Fixing Heater
Checking for Overheating at the End of the Fixing Heater
Protection Mechanisms
Thermistor
Thermal Fuse
Correcting Displacement of the Fixing Film
Cassette Pick up Delay Jam
Singlefeeder Pick up Delay Jam
Pick up Stationary Jam
Delivery Delay Jam
Power Supply
Distribution of Power
Power Supply Circuit
Detecting Errors by the Composite Power Supply PCB
Protection Mechanism of the Power Supply Circuit
Overcurrent
Standards and Adjustments
Actions to Take after Replacement
Adjusting the Intensity of the Scanning Lamp
Preparing for Adjustment
Adjusting the Leading Edge Non-Image Width
Adjusting the Leading Edge Margin
Fine-Adjusting the Reproduction Ratio
Checking the Photointerrupters
Self Diagnosis
Mechanical System
Externals
External Covers
Removing the Upper Cover
Removing the Front Lower Cover
Removing the Control Panel
Drive System
Scanner Drive Assembly
Removing the Scanner Drive Motor
Routing the Scanner Drive Cable
Lens Drive Assembly
Removing the Lens Cable
Main Motor/Main Drive Assembly
Removing the Main Motor Unit
Removing the Main Drive Assembly
Pick up Assembly
Cassette Pick up Roller Unit
Removing the Pick up Roller
Removing the Pick up Clutch
Multifeeder Assembly
Removing the Multifeeder Pick up Roller
Removing the Separation Pad
Singlefeeder Assembly
Removing the Singlefeeder Assembly
Feeding Assembly
Registration Roller
Detaching the Feeding Belt
Removing the Registration Roller Unit
Removing the Registration Roller Clutch
Delivery Assembly
Removing the Delivery Roller
Illuminating Assembly
Removing the Scanning Lamp
Installing the Scanning Lamp
Removing the Blanking Unit
Charging/Developing/Cleaning System
Cartridge
Transfer Corona Assembly
Cleaning the Drum
Removing the Transfer Charging Roller
Fixing System
Removing the Upper Fixing Unit
Electrical System
Removing the DC Controller PCB
Composite Power Supply PCB
Removing the Composite Power Supply PCB
Installation
Selecting the Site
Unpacking and Installation
Setting Copy Paper
Relocating the Copier
Maintenance and Servicing
Periodically Replaced Parts
Durables and Consumables
Scheduled Servicing
Storing Without Removing the Seal
After Opening
Storing after Removing the Seal
Temperature/Humidity Conditions
Handling
General Timing Chart
Signals
Abbreviations
General Circuit Diagram
DC Controller Circuit Diagram
Composite Power Supply Circuit Diagram
Control Panel Circuit Diagram
Intensity/Ae Sensor Circuit Diagram
Sensor Circuit Diagram
Noise Filter Circuit Diagram
High Voltage Contact Circuit Diagram
Blank Exposure Circuit Diagram
Special Tools
Solvents/Oils
Advertisement
Quick Links
1
Features
2
Names of Parts
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See also:
Service Manual
Table of
Contents
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This manual is also suitable for:
Pc740
Pc750
Pc770
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