Canon NP7161 - Chapter 10: Maintenance and Servicing; Periodically Replaced Parts

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Introduction3
System Configuration5
Contents7
Features17
Specifications18
Copier18
Type18
Mechanisms18
Performance19
Cassette Feeding Module - C124
Names of Parts25
External View25
Cassette Feeding Module26
Cross Section27
Operating the Machine29
Control Panel29
User Mode31
Outline31
Routine Maintenance (by the User)34
Points by Note (by the User)35
Image Formation36
Static Latent Image Formation Block37
Basic Operation41
Basic Mechanisms41
Functional Construction41
Outline of the Electrical Circuitry42
Basic Sequence of Operations at Power-On44
Basic Sequence of Operations at Copy Start46
Main Motor (M1) Control Circuitry48
Operation48
Detecting an Error48
Inputs to the DC Controller49
Outputs from the DC Controller52
Inputs to and Outputs from Accessories56
Exposure System59
Outline of Operation59
Changing the Reproduction Ratio59
Lens Drive System61
Driving the Lens61
Motor Control Circuit62
DC Controller PCB62
Moving the Lens63
Scanner Drive System64
Scanner Motor Control Circuit65
Relationship between Scanner Sensor and Signals65
Basic Sequence of Operations (Scanner)66
Scanner Movement in Page Separation Mode67
Detecting the Original Size68
Detection of the Original Size by the ADF68
Document Size Detection by Document Sensor (NP7210 Only)69
Document Size72
Disassembly/Assembly73
Scanner Drive Assembly74
Removing the Scanner Motor74
Removing the Scanner Drive Cable75
Routing the Scanner Drive Cable77
Adjusting the Position of the Mirror78
Adjusting the Tension of the Scanner Drive Cable79
Lens Drive Assembly80
Removing the Lens Drive Motor80
Removing the Mirror Motor81
Image Formation System85
Outline of the Processes85
Basic Sequence of Operations (Image Formation System)86
NP7161/NP7160 (A4, 2 Copies)86
NP7210 (A4, 2 Copies)86
Controlling the Intensity of the Scanning Lamp87
Protection Mechanisms89
Controlling the Primary/Transfer Bias90
Controlling the Developing/Separation Static Eliminator Bias91
Turning On/Off the Developing DC Bias92
Turning On/Off the Developing AC Bias/Separation Eliminator Bias93
Controlling the Developing DC Bias to a Specific Voltage to Suit Copy Density94
Controlling the Blank Exposure Lamp96
Turning on the Blank Exposure Lamp in Reduce Mode97
Turning on the Blank Exposure Lamp in Direct/Enlarge Mode97
Turning on the Blank Exposure Lamp in Multifeeder Mode97
Developing Assembly/Drum Cleaner98
Detecting and Controlling the Level of Toner100
Monitoring the Waste Toner Feeding Screw101
Monitoring the Waste Toner Box102
Control by the Cleaner Thermistor104
Copying Speed down Sequence104
Auto Density Adjustment (AE)105
Measuring the Density of the Original105
Scanning Lamp Assembly108
Removing the Scanning Lamp108
Mounting the Scanning Lamp109
Removing the Thermal Fuse109
Exposure Assembly110
Removing the Pre-Exposure/Blank Exposure Lamp Assembly110
Removing the Dust-Proofing Glass110
Cleaning the no 6 Mirror111
Drum Unit112
Removing the Drum Unit112
Cleaning the Photosensitive Drum113
Removing the Cleaner Thermistor113
Primary Charging Assembly114
Removing the Primary Charging114
Transfer Charging Assembly115
Removing the Transfer Charging Assembly115
Charging Wire116
Stringing the Charging Wires116
Adjust the Height of the Charging Wires120
Developing Assembly121
Removing the Developing Assembly121
Removing the Developing Blade121
Removing the Developing Cylinder122
Pick-Up/Feeding System127
Pick-Up from the Cassette128
Pick-Up Operation128
Sequence of Operations (Pick-Up/Feeding)129
NP7210 Vertical Path Paper Control (A4, 2 Sheets)130
Operation of the Cassette Lifter131
Detecting the Size of the Cassette133
Detecting the Cassette Size134
Pick-Up from the Multifeeder135
Detecting the Size of Paper in the Multifeeder136
Sequence of Operation (Pick-Up from Multifeeder)137
Controlling the Registration Clutch138
Sequence of Operations (Jam Detection)140
Registration Delay Jam140
Registration Stationary Jam140
Delivery Delay Jam141
Delivery Stationary Jam141
Pick-Up Assembly143
Removing the Pick-Up Roller143
Mounting the Pick-Up Roller143
Removing the Pick-Up Drive Assembly144
Removing the Pick-Up Assembly144
Removing the Feed Roller145
Removing the Separation Roller145
Mounting the Separation Roller146
Multifeeder Asseembly147
Removing the Multifeeder Tray147
Removing the Multifeeder Assembly147
Removing the Multifeeder Pick-Up Roller148
Removing the Separation Pad148
Adjusting the Pressure of the Separation Pad149
Removing the Registration Roller Assembly150
Cassette Assembly151
Removing the Cassette Size Switch151
Changing the Cassette Size (AB/INCH)152
Adjusting the Left/Right Registration153
Fixing System157
Controlling the Fixing Temperature158
Copy Speed Reducing Sequence (NP7210 Only)161
Error Detection Circuit164
Surface Temperature of the Fixing Upper Roller165
Activation of the Fixing Heater (H1)165
Fixing Assembly169
Construction169
Locking Mechanism169
Removing the Fixing Assembly169
Removing the Fixing Heater171
Removing the Thermal Switch Assembly172
Removing the Main Thermistor173
Removing the Sub Thermistor173
Removing the Fixing Upper Roller174
Removing the Fixing Lower Roller175
Removing the Heat Discharge Roller175
Adjusting the Height of the Fixing Inlet Guide175
Adjusting the Nip176
Measuring the Nip176
Delivery Assembly177
Removing the Upper Separation Claw177
Removing the Lower Separation Claw177
Removing the Delivery Roller178
Removing the Upper Left Cover191
Removing the Delivery Lower Cover191
Removing the Delivery Upper Cover191
Removing the Lower Inside Cover192
Control Panl193
Removing the Control Panel193
Copyboaed Glass194
Removing the Copyboard Glass194
Fans195
Removing the Scanner Cooling Fan195
Removing the Exhaust Fan196
Remove the Ozone Filter197
Counter Assembly198
Main Motor Assembly198
Removing the Counter Assembly198
Removing the Main Motor Assembly198
Removing the DC Controller PCB199
Points to Note When Replacing the DC Controller PCB199
Removing the Power Supply PCB200
Removing the High-Voltage Power Supply PCB200
Lamp Regulator PCB201
Removing the Lamp Regulator PCB201
Inputs to and Outputs from Cassette Relay PCB205
Cassette Feeding206
Cassette Motor Control Circuit207
Pick-Up/Feeding Sequence208
Vertical Path Paper Control of NP7161 and NP7160209
Vertical Path Paper Control of NP7210210
Waste Toner Swing Control211
Jam Detection212
Jam Detection Sequence213
External Cover215
Removing the Upper Front Cover215
Drive Assembly216
Removing the Cassette Motor216
Removing the Pick-Up Rollers217
Installing the Pick-Up Rollers217
Removing the Feed Rollers219
Removing the Separation Rollers219
Installing the Separation Rollers220
Cassette Size Switch Assembly221
Cassette Relay PCB223
Removing the Cassette Relay PCB223
Installation227
Selecting the Site227
Unpacking and Installation228
Removing the Metal Fixings229
Mounting the Drum Unit230
Cleaning the Parts and Making Checks232
Checking the Images/Operations and User Mode234
Supplying Toner236
Relocating the Machine238
Installing the Control Card IV N239
Installing the Remote Diagnostic Device II240
Installing the Accessory Counter249
Procedure for Installing the Accessory Heater251
Installing the Heater Switch251
Installing the Cassette/Drum Heater253
Installing the Mirror Heater255
Installing the Cassette Heater256
Maintenance and Service261
Periodically Replaced Parts261
Consumables and Durables262
Scheduled Servicing Chart264
Scheduled Servicing Table266
Guide to Troubleshooting Tables271
Standards and Adjustments275
Mechanical275
Leading Edge Non-Image Width (Blank Exposure Lamp off Timing)275
Image Leading Edge Margin (Registration on Timing)275
Left/Right Registration (Cassette)276
Routing the Scanner Drive Cble277
Adjusting the Height of the Charging Wires283
Adjusting the Height of the Fixing Assembly Inlet Guide286
Adjusting the Pressure of the Lower Roller286
Electrical System288
Obtaining Optimum Exposure288
AE Adjustment289
After Replacing the DC Controller PCB292
Checking the Photointerrupters293
Image Faults297
Initial Checks297
Checking the Site Environment297
Checking the Originals297
Checking the Charging Assembly298
Checking the Developing Assembly298
Checking the Paper298
Checking the Periodically Replaced Parts298
Troubleshooting Image Faults301
The Copy Is too Light (Halftone Area Only)301
The Copy Has Uneven Density (Front Side Dark)303
The Copy Has Uneven Density (Front Side Light)303
The Copy Is Foggy (Overall)304
The Copy Is Foggy (Vertical)305
The Copy Has Black Lines (Vertical, Fuzzy, Thick)305
The Copy Has Black Lines (Vertical, Thin)305
The Copy Has White Spots (Vertical)306
The Copy Has White Lines (Vertical)306
The Back of the Copy Is Soiled308
The Copy Has Faulty Fixing309
The Copy Has a Displaced Leading Edge310
The Copy Has a Blurred Image311
The Copy Is Foggy (Horizontally)311
The Copy Has Poor Sharpness312
The Copy Is Blank313
The Copy Is Solid Black313
Troubleshooting Malfunctions314
E000314
E001315
E002/E003316
E004317
E010317
E013317
E030318
E031318
E202 (the Keys on the Control Panel Fail to Operate)318
E208319
E210319
E220319
E261320
E710/E711320
E712320
E717320
E800321
E805321
E821321
AC Power Is Absent322
DC Power Supply Is Absent323
The Scanner Fails to Move324
The Lens Fails to Move325
The Mirror Fails to Move325
The Scanning Lamp Fails to Turn on326
The Pre-Exposure Lamp Fails to Turn on327
The Blank Exposure Lamp Fails to Turn on327
Pick-Up Fails (Cassette)328
Pick-Up Operation Fails (Multifeeder)329
The Registration Roller Fails to Rotate329
The Fixing Heater Fails to Mturn on330
The Add Toner Indicator Does Not Flash/Turn on330
The Add Toner Indicator Fails to Turn off331
The Waste Toner Box Full Indicator Fails to Flash/Turn on331
The Waste Toner Box Full Indicator Fails to Turn off332
The Add Paper Indicator Fails to Flash332
The Add Paper Indicator Fails to Turn off333
The Jam Indicator Fails to Flash333
The Jam Indicator Fails to Turn off334
The Set Control Card Indicator Fails to Turn on334
The Set Control Card Indicator Fails to Turn off334
E904335
Fails to Pick up336
Load Paper Indicator Fails to Flash337
Load Paper Indicator Fails to Extinguish337
Troubleshooting Feeding Problems338
Copy Jams338
Pick-Up /Feeding Assembly339
Fixing/Delivery Assembly340
Faulty Feeding341
Double Feeding341
Wrinkles341
Arrangement and Functions of Electrical Parts342
Motors, Fans,Clutches and Solenoids344
Heater, Lamps and Others346
Pcbs348
Variable Resistors, Light-Emitting Diodes and Check Pins by PCB350
Power Supply PCB353
High-Voltage Power Supply PCB354
Service Mode355
Using Service Mode355
Starting Service Mode355
Selecting Service Mode355
Using Adjust Mode and Function Mode356
Display Mode357
Guide to Jam Types and Jam History358
Guide to ADF Jam History and ADF Jam Type359
Guide to ADF Warning359
Guide to Sorter Jam History and Sorter Jam Type359
Guide to Sorter Tray Warning360
Checking the Control Panel Keys360
How to Read no 127 Document Size Indicator (NP7210 Only)361
I/O Display Mode362
Guide to Nos 202, 203, 204, 205, 219, 220, 221, 222 and 223363
Adjust Mode366
Function Mode368
Option Mode369
Paper Sizes Available under no 505/506371
Counter Mode372
Application Mode373
Self Diagnosis374
Adf378
Sorter379
Special Tools List391
Solvents and Oils392

Canon NP7161 - Chapter 10: Maintenance and Servicing; Periodically Replaced Parts

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