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NP7161
Service manual
Canon NP7161 Service Manual
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Service manual
(346 pages)
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Table Of Contents
395
page
of
395
Go
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395
Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Introduction
System Configuration
Contents
Features
Specifications
Copier
Type
Mechanisms
Performance
Cassette Feeding Module - C1
Names of Parts
External View
Cassette Feeding Module
Cross Section
Operating the Machine
Control Panel
User Mode
Outline
Routine Maintenance (by the User)
Points by Note (by the User)
Image Formation
Static Latent Image Formation Block
Basic Operation
Basic Mechanisms
Functional Construction
Outline of the Electrical Circuitry
Basic Sequence of Operations at Power-On
Basic Sequence of Operations at Copy Start
Main Motor (M1) Control Circuitry
Operation
Detecting an Error
Inputs to the DC Controller
Outputs from the DC Controller
Inputs to and Outputs from Accessories
Exposure System
Outline of Operation
Changing the Reproduction Ratio
Lens Drive System
Driving the Lens
Motor Control Circuit
DC Controller PCB
Moving the Lens
Scanner Drive System
Scanner Motor Control Circuit
Relationship between Scanner Sensor and Signals
Basic Sequence of Operations (Scanner)
Scanner Movement in Page Separation Mode
Detecting the Original Size
Detection of the Original Size by the ADF
Document Size Detection by Document Sensor (NP7210 Only)
Document Size
Disassembly/Assembly
Scanner Drive Assembly
Removing the Scanner Motor
Removing the Scanner Drive Cable
Routing the Scanner Drive Cable
Adjusting the Position of the Mirror
Adjusting the Tension of the Scanner Drive Cable
Lens Drive Assembly
Removing the Lens Drive Motor
Removing the Mirror Motor
Image Formation System
Outline of the Processes
Basic Sequence of Operations (Image Formation System)
NP7161/NP7160 (A4, 2 Copies)
NP7210 (A4, 2 Copies)
Controlling the Intensity of the Scanning Lamp
Protection Mechanisms
Controlling the Primary/Transfer Bias
Controlling the Developing/Separation Static Eliminator Bias
Turning On/Off the Developing DC Bias
Turning On/Off the Developing AC Bias/Separation Eliminator Bias
Controlling the Developing DC Bias to a Specific Voltage to Suit Copy Density
Controlling the Blank Exposure Lamp
Turning on the Blank Exposure Lamp in Reduce Mode
Turning on the Blank Exposure Lamp in Direct/Enlarge Mode
Turning on the Blank Exposure Lamp in Multifeeder Mode
Developing Assembly/Drum Cleaner
Detecting and Controlling the Level of Toner
Monitoring the Waste Toner Feeding Screw
Monitoring the Waste Toner Box
Control by the Cleaner Thermistor
Copying Speed down Sequence
Auto Density Adjustment (AE)
Measuring the Density of the Original
Scanning Lamp Assembly
Removing the Scanning Lamp
Mounting the Scanning Lamp
Removing the Thermal Fuse
Exposure Assembly
Removing the Pre-Exposure/Blank Exposure Lamp Assembly
Removing the Dust-Proofing Glass
Cleaning the no 6 Mirror
Drum Unit
Removing the Drum Unit
Cleaning the Photosensitive Drum
Removing the Cleaner Thermistor
Primary Charging Assembly
Removing the Primary Charging
Transfer Charging Assembly
Removing the Transfer Charging Assembly
Charging Wire
Stringing the Charging Wires
Adjust the Height of the Charging Wires
Developing Assembly
Removing the Developing Assembly
Removing the Developing Blade
Removing the Developing Cylinder
Pick-Up/Feeding System
Pick-Up from the Cassette
Pick-Up Operation
Sequence of Operations (Pick-Up/Feeding)
NP7210 Vertical Path Paper Control (A4, 2 Sheets)
Operation of the Cassette Lifter
Detecting the Size of the Cassette
Detecting the Cassette Size
Pick-Up from the Multifeeder
Detecting the Size of Paper in the Multifeeder
Sequence of Operation (Pick-Up from Multifeeder)
Controlling the Registration Clutch
Sequence of Operations (Jam Detection)
Registration Delay Jam
Registration Stationary Jam
Delivery Delay Jam
Delivery Stationary Jam
Pick-Up Assembly
Removing the Pick-Up Roller
Mounting the Pick-Up Roller
Removing the Pick-Up Drive Assembly
Removing the Pick-Up Assembly
Removing the Feed Roller
Removing the Separation Roller
Mounting the Separation Roller
Multifeeder Asseembly
Removing the Multifeeder Tray
Removing the Multifeeder Assembly
Removing the Multifeeder Pick-Up Roller
Removing the Separation Pad
Adjusting the Pressure of the Separation Pad
Removing the Registration Roller Assembly
Cassette Assembly
Removing the Cassette Size Switch
Changing the Cassette Size (AB/INCH)
Adjusting the Left/Right Registration
Fixing System
Controlling the Fixing Temperature
Copy Speed Reducing Sequence (NP7210 Only)
Error Detection Circuit
Surface Temperature of the Fixing Upper Roller
Activation of the Fixing Heater (H1)
Fixing Assembly
Construction
Locking Mechanism
Removing the Fixing Assembly
Removing the Fixing Heater
Removing the Thermal Switch Assembly
Removing the Main Thermistor
Removing the Sub Thermistor
Removing the Fixing Upper Roller
Removing the Fixing Lower Roller
Removing the Heat Discharge Roller
Adjusting the Height of the Fixing Inlet Guide
Adjusting the Nip
Measuring the Nip
Delivery Assembly
Removing the Upper Separation Claw
Removing the Lower Separation Claw
Removing the Delivery Roller
Removing the Upper Left Cover
Removing the Delivery Lower Cover
Removing the Delivery Upper Cover
Removing the Lower Inside Cover
Control Panl
Removing the Control Panel
Copyboaed Glass
Removing the Copyboard Glass
Fans
Removing the Scanner Cooling Fan
Removing the Exhaust Fan
Remove the Ozone Filter
Counter Assembly
Main Motor Assembly
Removing the Counter Assembly
Removing the Main Motor Assembly
Removing the DC Controller PCB
Points to Note When Replacing the DC Controller PCB
Removing the Power Supply PCB
Removing the High-Voltage Power Supply PCB
Lamp Regulator PCB
Removing the Lamp Regulator PCB
Inputs to and Outputs from Cassette Relay PCB
Cassette Feeding
Cassette Motor Control Circuit
Pick-Up/Feeding Sequence
Vertical Path Paper Control of NP7161 and NP7160
Vertical Path Paper Control of NP7210
Waste Toner Swing Control
Jam Detection
Jam Detection Sequence
External Cover
Removing the Upper Front Cover
Drive Assembly
Removing the Cassette Motor
Removing the Pick-Up Rollers
Installing the Pick-Up Rollers
Removing the Feed Rollers
Removing the Separation Rollers
Installing the Separation Rollers
Cassette Size Switch Assembly
Cassette Relay PCB
Removing the Cassette Relay PCB
Installation
Selecting the Site
Unpacking and Installation
Removing the Metal Fixings
Mounting the Drum Unit
Cleaning the Parts and Making Checks
Checking the Images/Operations and User Mode
Supplying Toner
Relocating the Machine
Installing the Control Card IV N
Installing the Remote Diagnostic Device II
Installing the Accessory Counter
Procedure for Installing the Accessory Heater
Installing the Heater Switch
Installing the Cassette/Drum Heater
Installing the Mirror Heater
Installing the Cassette Heater
Maintenance and Service
Periodically Replaced Parts
Consumables and Durables
Scheduled Servicing Chart
Scheduled Servicing Table
Guide to Troubleshooting Tables
Standards and Adjustments
Mechanical
Leading Edge Non-Image Width (Blank Exposure Lamp off Timing)
Image Leading Edge Margin (Registration on Timing)
Left/Right Registration (Cassette)
Routing the Scanner Drive Cble
Adjusting the Height of the Charging Wires
Adjusting the Height of the Fixing Assembly Inlet Guide
Adjusting the Pressure of the Lower Roller
Electrical System
Obtaining Optimum Exposure
AE Adjustment
After Replacing the DC Controller PCB
Checking the Photointerrupters
Image Faults
Initial Checks
Checking the Site Environment
Checking the Originals
Checking the Charging Assembly
Checking the Developing Assembly
Checking the Paper
Checking the Periodically Replaced Parts
Troubleshooting Image Faults
The Copy Is too Light (Halftone Area Only)
The Copy Has Uneven Density (Front Side Dark)
The Copy Has Uneven Density (Front Side Light)
The Copy Is Foggy (Overall)
The Copy Is Foggy (Vertical)
The Copy Has Black Lines (Vertical, Fuzzy, Thick)
The Copy Has Black Lines (Vertical, Thin)
The Copy Has White Spots (Vertical)
The Copy Has White Lines (Vertical)
The Back of the Copy Is Soiled
The Copy Has Faulty Fixing
The Copy Has a Displaced Leading Edge
The Copy Has a Blurred Image
The Copy Is Foggy (Horizontally)
The Copy Has Poor Sharpness
The Copy Is Blank
The Copy Is Solid Black
Troubleshooting Malfunctions
E000
E001
E002/E003
E004
E010
E013
E030
E031
E202 (the Keys on the Control Panel Fail to Operate)
E208
E210
E220
E261
E710/E711
E712
E717
E800
E805
E821
AC Power Is Absent
DC Power Supply Is Absent
The Scanner Fails to Move
The Lens Fails to Move
The Mirror Fails to Move
The Scanning Lamp Fails to Turn on
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Introduction
2
System Configuration
3
Specifications
4
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Table of
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Table of Contents
Troubleshooting
Guide to Troubleshooting Tables
271
Troubleshooting Image Faults
301
Troubleshooting Malfunctions
314
Troubleshooting Feeding Problems
338
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Np7160
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