Canon NP6251 Manuals

Manuals and User Guides for Canon NP6251. We have 3 Canon NP6251 manuals available for free PDF download: Service Manual, Service Bulletin

Canon NP6251 Service Manual

Canon NP6251 Service Manual (812 pages)

Brand: Canon | Category: Copier | Size: 10 MB

Table of Contents

Table of Contents

7
- System Configuration
  5
- Chapter 1 General Description
  
  20
  - Features
    20
  - Specifications
    21
    
    Copier
    21
    
    II. Specifications
    21
    
    Mechanisms
    21
    
    Type
    21
    
    Performance
    22
    
    Others
    25
    
    Paper Deck-A1
    28
  - Names of Parts
    29
    
    External View
    29
    
    III. Names of Parts
    29
    
    Cross Section
    31
  - Operating the Machine
    32
    
    Control Panel
    32
    
    Extended Modes
    33
    
    User Mode
    34
  - Points to Note (by the User)
    38
  - Routine Maintenance by the User
    38
  - Image Formation
    39
    
    Outline
    39
Chapter 2 Basic Operation

42
- Basic Operation
  42
- Basic Mechanisms
  43
Chapter 3 Exposure System

75
- Outline of Operation
  76
  - Varying the Reproduction Ratio
    76
    
    Outline of the Movement
    77
  - Lens Drive System
    77
    
    Lens Motor Control Circuit
    78
    
    Moving the Lens
    78
    
    Moving of the Lens
    79
- Scanner Drive System
  81
- Others
  95
  - Original Size Detection
    95
    
    Outline of Detection
    95
    
    Operation
    96
- Disassembly and Assembly
  98
  - Scanner Drive Assembly
    99
    
    Removing the Scanner Drive Motor
    99
    
    Orienting the Heat Absorbing Glass
    101
    
    Routing the Scanner Drive Cable
    101
    
    Removing the Scanner Drive Cable
    102
    
    Adjusting the Tension of the Scanner Drive Cable
    104
    
    Positioning the Mirror
    104
    
    Adjusting the Scanner Home Position
    105
    
    Positioning the Scanner Locking Solenoid (SL1)
    106
  - Lens Drive Assembly
    107
    
    Removing the Lens Stage Temporarily
    109
    
    Installing the Light-Blocking Belt Mount
    110
    
    Removing the Lens X Direction Drive Motor
    111
    
    Attaching the Lens X Direction Drive Belt
    112
    
    Replacing the Light Blocking Belt
    113
Chapter 4 Image Formation System

114
- Processes
  115
  - Controlling the Drum Surface Potential
    115
    
    Outline
    115
    
    Control Method
    116
    
    Potential Measurement Circuit
    118
  - Controlling the Intensity of the Scanning Lamp
    120
    
    Outline
    120
    
    Auto Exposure Control
    121
    
    Operation
    121
    
    Making Checks
    124
  - Controlling the Primary/Transfer Corona Current
    125
    
    Controlling the Primary Corona Current
    125
    
    Outline
    125
    
    Controlling the Transfer Corona Current
    127
  - Controlling the Separation/Pre-Transfer Corona Current
    129
    
    Outline
    129
    
    Turning on and off the Separation/ Pre-Transfer II. Corona Current
    130
    
    Pre-Transfer Corona Current
    131
    
    Separation Corona Current (DC Component)
    131
    
    Of the Separation/Pre-Transfer Corona Current
    132
  - Controlling the Blanking Exposure Lamp (LED)
    133
    
    Controlling the Activation in Direct Mode
    133
    
    Controlling the Activation in Reduce Mode
    133
    
    Lamp (LED)
    133
    
    Outline
    133
    
    Controlling the Activation in AE Mode
    135
  - Drum Heater Circuit
    136
    
    Outline
    136
    
    Idle Rotation of the Photosensitive Drum and the Developing Cylinder
    138
  - Cleaning the Primary Charging Wire
    139
    
    Automatic Cleaning Mechanism
    139
    
    Outline
    139
  - Pre-Transfer/Transfer/Separation Charging Wire Automatic Cleaning Mechanism
    140
  - Drum Cleaning Assembly/Developing Assembly
    142
  - Outline
    142
  - Detecting the Level of Toner and Controlling the Supply Operation
    144
  - Controlling the Developing Bias/Roller Electrode
    146
    
    Control Timing
    146
    
    Outline
    146
    
    Developing Bias Control Circuit
    149
    
    Roller Electrode Bias Control Circuit
    150
  - Detecting the Waste Toner Feeding Screw (Locking)
    152
- Disassembly and Assembly
  153
  - Scanning Lamp Assembly
    153
    
    Removing the Scanning Lamp
    153
    
    Removing the Thermal Fuse
    155
  - Standard White Plate
    155
  - Pre-Exposure Lamp Unit
    157
    
    Removing the Pre-Exposure Lamp Unit
    157
  - Blanking Exposure Lamp Assembly
    158
    
    Removing the Blanking Exposure Lamp Assembly
    158
  - Photosensitive Drum
    159
    
    Removing the Drum Unit
    159
    
    Installing the Photosensitive Drum
    161
    
    Replacing the Drum Heater
    161
  - Potential Sensor Assembly
    162
    
    Removing the Potential Sensor Assembly
    162
  - Primary Charging Assembly
    162
    
    Removing the Primary Charging Assembly
    162
  - Pre-Transfer Charging Assembly
    163
    
    Removing the Pre-Transfer Charging Assembly
    163
  - Transfer/Separation Charging Assembly
    163
    
    Removing the Transfer/Separation Charging Assembly
    163
    
    Installing the Transfer/Separation Charging Assembly
    165
  - Charging Wire
    167
    
    Outline
    167
  - Developing Assembly
    174
  - Hopper Assembly
    180
  - Drum Cleaner
    181
  - Separation Claw/Separation Claw Drive Assembly
    185
  - Waste Toner Feeding Assembly
    186
Chapter 5 Pick-Up/Feeding System

187
Chapter 6 Fixing System

308
- Fixing System
  308
- Outline
  309
- Outline of Operations
  309
- Fixing Drive Assembly
  311
- Controlling the Fixing Temperature
  313
- Reciprocating Mechanism for the Main Thermistor (TH1)
  318
- Disassembly and Assembly
  326
  - Fixing Assembly
    327
    
    Construction
    327
    
    Locking Mechanism
    327
    
    Removing the Fixing Cleaning Belt
    328
    
    Installing the Fixing Cleaning Belt
    330
    
    Removing the Upper Fixing Unit
    331
    
    Removing the Fixing Heater
    333
    
    Installing the Fixing Heater
    335
    
    Removing the Fixing Upper Roller
    335
    
    Installing the Upper Fixing Roller
    337
  - Delivery Assembly
    344
Chapter 7 Externals/Auxiliary Mechanisms

349
- Control Panel
  350
  - Outline
    350
  - Operation
    350
    
    Data Communication
    350
    
    LCD Processing
    351
    
    Automatic Control of LCD Contrast
    353
    
    Touch Switch Inputs
    354
- Fans
  355
- Power Supply
  358
  - Outline of Power Supply
    358
  - Power Supply Circuit
    359
  - Date/Time Display Power Supply
    361
- Disassembly and Assembly
  362
  - External Covers
    363
    
    Removing the Front Door
    364
    
    Cover
    366
    
    Removing the Fixing/Feeding Unit
    366
    
    Removing the Rear Cover
    366
    
    Sliding out the Hopper Assembly
    367
  - Removing the Process Unit
    367
  - Installing the Process Unit
    370
- Control Panel
  371
- Door Switch Assembly
  377
- Fan Unit
  379
  - Removing the Scanner Cooling Fan
    379
  - Removing the Exhaust Fan
    379
  - Removing the Fixing Heat Exhaust Fan
    380
    
    Removing the Developing Fan
    380
    
    Removing the Cleaner Fan
    381
    
    Removing the Feeding Fan
    382
  - Removing the Counter Assembly
    382
  - Main Motor Assembly
    383
    
    Removing the Main Motor
    383
  - Fixing/Waste Toner Drive Assembly
    384
    
    Construction
    384
    
    Removing the Fixing/Waste Toner Drive Assembly
    384
    
    Removing the Waste Toner Bottle
    384
  - Main Drive Assembly (Drum/Developing)
    387
    
    Construction
    387
    
    Removing
    387
  - Vertical Path Drive Assembly
    389
  - Pick-Up Drive Assembly
    391
    
    Construction
    391
    
    Removing
    392
  - Duplexing Drive (1) Assembly
    393
  - Lifter Drive Assembly
    395
  - Cassette Pick-Up Drive Assembly
    397
  - Attaching the Drive Belt
    399
  - DC Controller PCB
    400
  - DC Power Supply Assembly
    401
  - High-Voltage Transformer Assembly
    402
  - Power Supply Inlet Assembly
    403
Chapter 8 Paper Deck-A1

404
- Side Paper Deck
  405
  - Inputs to and Outputs from the Side Deck Driver
    405
    
    Inputs to the Side Deck Driver (1/2)
    405
    
    Inputs to the Side Deck Driver
    406
    
    Outputs from the Side Deck Driver (1/1)
    407
  - Pick-Up
    408
    
    Outline
    408
    
    Pick-Up Operation
    408
    
    Sequence of Operations (Deck Pick-Up)
    410
  - Detection of Paper for the Deck
    411
    
    Absence of Paper
    411
    
    Changing the Paper Size for the Deck
    411
  - Deck Lifter
    412
    
    Lifter Operation
    412
  - Opening/Closing the Deck
    415
  - (Compartment)
    415
    
    Sequence of Operations (Deck Opening/Closing)
    416
    
    Controlling the Deck Main Motor (M101)
    417
  - Controlling the Deck Motor
    417
    
    Controlling the Deck Lifter Motor (M102)
    419
  - Detecting Jams
    421
    
    Outline
    421
    
    Deck Pick-Up/Vertical Path Delay Jam
    422
    
    Deck Pick-Up/Vertical Path Stationary Jam
    422
    
    When Copy Paper Is Present at any of the Sensors at Power-On, End of Wait-Up, or During Standby
    422
- Disassembly and Assembly
  423
  - External Covers
    424
    
    Removing the
    425
    
    Removing the Vertical Path Cover (Rear)
    428
    
    Removing the Right Cover
    429
    
    Removing the Upper Cover
    430
  - Paper Deck
    432
    
    Removing the Deck from the Copier
    432
    
    Removing the Compartment
    434
    
    Changing the Deck Paper Size
    436
    
    Adjusting the Deck Registration
    437
    
    Positioning the Roll
    438
    
    Drive System
    439
    
    Removing the Deck Pick-Up Clutch (CL102)
    439
    
    Removing the Deck Vertical Path Clutch (CL101)
    439
    
    Removing the Deck Main Motor (M101)
    440
    
    Removing the Deck Lifter Motor (M102)
    441
    
    Removing the Lifter Cable (Deck Front)
    442
    
    Removing the Lifter Cable (Deck Rear)
    444
    
    Routing the Lifter Cable
    447
  - Feeding System
    448
    
    Removing the Deck Pick-Up Unit
    448
    
    Removing the Deck Pick-Up Roller
    449
    
    Electrical System
    453
Chapter 9 Installation

455
- Selecting the Site
  456
- Unpacking and Installing
  459
  - Unpacking
    460
  - Installing the Scanner
    462
  - Installing the Fixing Assembly
    463
  - Installing the AP Kit and the Charging Assemblies
    465
  - Installing the Copy Tray
    471
    
    Replacing the Delivery Gear
    471
    
    Assembly
    472
    
    Replacing the Delivery Roller Leaf Spring
    472
    
    Checking the Developing Assembly
    473
  - Installing the Pick-Up Assembly
    475
  - Supplying Toner
    477
    
    Connecting the RDF Connector
    481
- Relocating the Machine
  486
- Installing the Control Card V
  487
- Installing the Copy Data Controller-A1
  495
  - Setting the Board
    495
  - Installing to the Copier
    499
  - Checking the Operation
    501
- Installing the Remote Diagnostic Device II
  511
  - Installation to the Copier
    511

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Canon NP6251 Service Manual

Canon NP6251 Service Manual (812 pages)

Brand: Canon | Category: Printer | Size: 9 MB

Table of Contents

Table of Contents

7
- System Configuration
  5
Table of Contents

17
- Chapter 1 General Description
  20
- Features
  20
- Specifications
  21
  - II. Specifications
    21
  - Copier
    21
    
    Type
    21
    
    Mechanisms
    21
    
    Performance
    22
    
    Others
    25
  - Paper Deck-A1
    28
  - Specifications
    28
- Names of Parts
  29
  - III. Names of Parts
    29
  - External View
    29
  - Cross Section
    31
  - Copier
    31
  - Operating the Machine
    32
    
    Control Panel
    32
    
    Extended Modes
    33
    
    User Mode
    34
    
    Types of User Modes
    34
  - Routine Maintenance by the User
    38
  - Points to Note (by the User)
    38
  - Image Formation
    39
- VII. Image Formation
  39
  - Outline
    39
Chapter 2 Basic Operation

42
- Basic Operation
  42
- Basic Mechanisms
  43
Chapter 3 Exposure System

75
- Holding Tray Feeding
  43
- Outline of Operation
  76
  - Varying the Reproduction Ratio
    76
  - Lens Drive System
    77
  - Outline of the Movement
    77
  - Moving of the Lens
    78
    
    Moving the Lens
    78
    
    Lens Motor Control Circuit
    78
    
    Moving the Lens
    79
- Scanner Drive System
  81
  - Scanner Movement
    81
    
    Outline of Movement
    81
    
    Relationship between the Scanner Sensors and the Signals
    82
    
    Basic Sequence of Operations
    83
    
    Movement of the Scanner in Page Separation Mode
    84
  - Outline
    86
    
    Movement of the Scanner with the RDF in Use (A4, 2 Originals, 1 Copy)
    86
    
    Movement of the Scanner with the RDF in Use (A4, 2 Copies)
    88
    
    Scanner Motor (M3) Control Circuit
    92
- Others
  95
  - Original Size Detection
    95
    
    Outline of Detection
    95
    
    Operation
    96
- Disassembly and Assembly
  98
  - Scanner Drive Assembly
    99
    
    Removing the Scanner Drive Motor
    99
    
    Routing the Scanner Drive Cable
    101
    
    Orienting the Heat Absorbing Glass
    101
    
    Removing the Scanner Drive Cable
    102
    
    Adjusting the Tension of the Scanner Drive Cable
    104
    
    Positioning the Mirror
    104
    
    Adjusting the Scanner Home Position
    105
    
    Positioning the Scanner Locking Solenoid (SL1)
    106
  - Lens Drive Assembly
    107
    
    Removing the Lens y Direction Drive Motor
    107
    
    Removing the Lens Stage Temporarily
    109
    
    Installing the Light-Blocking Belt Mount
    110
    
    Removing the Lens X Direction Drive Motor
    111
    
    Attaching the Lens X Direction Drive Belt
    112
    
    Routing the Light-Blocking Belt
    112
    
    Replacing the Light Blocking Belt
    113
Chapter 4 Image Formation System

114
- Processes
  115
  - Controlling the Drum Surface Potential
    115
    
    Outline
    115
    
    Control Method
    116
    
    Potential Measurement Circuit
    118
  - Controlling the Intensity of the Scanning Lamp
    120
    
    Outline
    120
    
    Operation
    121
    
    Auto Exposure Control
    121
    
    Making Checks
    124
  - Controlling the Primary/Transfer Corona Current
    125
    
    Outline
    125
    
    Controlling the Primary Corona Current
    125
    
    Controlling the Transfer Corona Current
    127
  - Controlling the Separation/Pre-Transfer Corona Current
    129
    
    Outline
    129
    
    Turning on and off the Separation/ Pre-Transfer II. Corona Current
    130
    
    Separation Corona Current (DC Component)
    131
    
    Pre-Transfer Corona Current
    131
    
    Of the Separation/Pre-Transfer Corona Current
    132
  - Controlling the Blanking Exposure Lamp (LED)
    133
    
    Outline
    133
    
    Controlling the Activation in Reduce Mode
    133
    
    Controlling the Activation in Direct Mode
    133
    
    Controlling the Activation in Hole Image Erase Mode
    135
    
    Controlling the Activation in AE Mode
    135
  - Drum Heater Circuit
    136
    
    Outline
    136
    
    Idle Rotation of the Photosensitive Drum and the Developing Cylinder
    138
  - Cleaning the Primary Charging Wire
    139
    
    Outline
    139
    
    Automatic Cleaning Mechanism
    139
  - Pre-Transfer/Transfer/Separation Charging Wire Automatic Cleaning Mechanism
    140
  - Drum Cleaning Assembly/Developing Assembly
    142
  - Outline
    142
  - Detecting the Level of Toner and Controlling the Supply Operation
    144
  - Controlling the Developing Bias/Roller Electrode
    146
    
    Outline
    146
    
    Control Timing
    146
    
    Developing Bias Control Circuit
    149
    
    Roller Electrode Bias Control Circuit
    150
  - Detecting the Waste Toner Feeding Screw (Locking)
    152
- Disassembly and Assembly
  153
  - Scanning Lamp Assembly
    153
    
    Removing the Scanning Lamp
    153
    
    Removing the Thermal Fuse
    155
  - Standard White Plate
    155
  - Pre-Exposure Lamp Unit
    157
    
    Removing the Pre-Exposure Lamp Unit
    157
  - Blanking Exposure Lamp Assembly
    158
    
    Removing the Blanking Exposure Lamp Assembly
    158
  - Photosensitive Drum
    159
    
    Removing the Drum Unit
    159
    
    Replacing the Drum Heater
    161
    
    Installing the Photosensitive Drum
    161
  - Potential Sensor Assembly
    162
    
    Removing the Potential Sensor Assembly
    162
  - Primary Charging Assembly
    162
    
    Removing the Primary Charging Assembly
    162
  - Pre-Transfer Charging Assembly
    163
    
    Removing the Pre-Transfer Charging Assembly
    163
  - Transfer/Separation Charging Assembly
    163
    
    Removing the Transfer/Separation Charging Assembly
    163
    
    Installing the Transfer/Separation Charging Assembly
    165
  - Charging Wire
    167
    
    Outline
    167
    
    The Primary Charging Assembly
    167
    
    Stringing the Charging Wires
    167
    
    Stringing the Grid Wire of the Primary Charging Assembly
    170
    
    Adjusting the Height of the Charging Wire
    172
    
    Cleaning the Primary Charging Assembly Anti-Stray Sheet
    173
  - Developing Assembly
    174
    
    Removing the Developing Assembly from the Copier
    174
    
    Installing the Blade
    175
    
    Removing the Blade Unit
    175
    
    Cylinder and the Magnetic Seal
    176
    
    Cleaning the Developing Assembly Anti-Stray Sheet
    179
  - Hopper Assembly
    180
  - Removing the Hopper Assembly from the Copier
    180
  - Drum Cleaner
    181
    
    Construction
    181
    
    Removing the Cleaning Blade
    181
    
    Installing the Cleaning Blade
    182
    
    Installing the Side Seal
    183
  - Separation Claw/Separation Claw Drive Assembly
    185
    
    Removing from the Drum Unit
    185
  - Waste Toner Feeding Assembly
    186
Chapter 5 Pick-Up/Feeding System

187
- Pick-Up/Feeding System
  187
- Outline
  188
- Pick-Up/Feeding System
  188
- Cassette Pick-Up
  191
  - II. Cassette Pick-Up
    191
  - Pick-Up Operation
    191
    
    Outline
    192
    
    Sequence of Pick-Up Operations
    192
  - Cassette Lifter Operation
    193
  - Identifying the Size of Copy Paper in the Cassette
    195
    
    Outline
    195
    
    Markings on the Width Guide Rail
    197
    
    Paper
    199
    
    Registering Paper Width Basic Value
    199
- Front Paper Deck Assembly
  200
  - Outline
    200
    
    Pick-Up Operation
    201
    
    Sequence of Pick-Up Operations
    202
  - Lifter Operation
    203
    
    Operation
    203
    
    Deck Limit Detection
    205
  - Detecting the Presence/Absence of Paper in the Deck
    206
    
    Detecting the Presence
    206
    
    Detecting the Size of the Deck
    206
  - High-Speed Pick-Up
    206
- Multifeeder
  207
- Controlling the Registration Clutch
  210
- Making Two-Sided/Overlay Copies
  211
- Detecting Jams
  233
  - Outline
    233
    
    Registration Roller Delay Jam
    236
    
    Registration Roller Stationary Jam
    236
    
    Pick-Up Vertical Path Feeding 0/1 Delay Jam
    237
    
    Pick-Up Vertical Path Feeding 0/1 Stationary Jam
    237
    
    Pick-Up Vertical Path Feeding 2 through 4 Delay Jam
    238
    
    Pick-Up Vertical Path Feeding 2 through 4 Stationary Jam
    238
    
    Fixing Assembly Outlet Delay Jam
    239
    
    Fixing Assembly Outlet Stationary Jam
    239
    
    External Delivery Delay Jam
    240
    
    External Delivery Stationary Jam
    240
    
    Internal Delivery Delay Jam
    241
    
    Internal Delivery Stationary Jam
    241
    
    Holding Tray Inlet Delay Jam
    242
    
    Holding Tray Inlet Stationary Jam
    242
    
    Holding Tray Re-Pick up Delay Jam
    243
    
    Holding Tray Registration Delay Jam
    243
    
    Holding Tray Registration Stationary Jam
    244
    
    Holding Tray Feeding 1/2 Delay Jam
    244
    
    Holding Tray Feeding 1/2 Stationary Jam
    245
    
    Left Deck Pick-Up Delay Jam
    245
    
    Left Deck Pick-Up Stationary Jam
    246
    
    Fixing Separation Claw Assembly Stationary Jam
    246
- Disassembly and Assembly
  247
- Removing the Feeding Belt
  284
  - Holding Tray Assembly
    288
    
    Construction
    288
    
    Removing the Holding Tray from the Copier
    289
    
    Removing the Holding Tray Re-Pick up Assembly
    289
    
    Removing the Holding Tray Registration Paper Sensor
    290
    
    Removing the Re-Pick up Roller
    291
    
    Removing the Holding Tray Driver PCB
    291
    
    Removing the Holding Tray y Motor
    292
    
    Removing the y Motor Home Position Sensor
    294
    
    Removing the Holding Tray Inlet Assembly
    294
    
    Roller/Separation Belt Assembly
    296
- Removing the Feeding Roller
  297
Chapter 6 Fixing System

308
- Outline
  309
- Outline of Operations
  309
- Fixing Drive Assembly
  311
- Controlling the Fixing Temperature
  313
- The Main Thermistor (TH1)
  313
- D. Reciprocating Mechanism for the Main Thermistor (TH1)
  318
- Reciprocating Mechanism for the Upper Separation Claw
  319
- SSR Error Detection Circuit for the Fixing Heater
  320
- Locking Operation (Fixing/Feeding Unit)
  322
- Error Detection Circuit
  323
- Disassembly and Assembly
  326
  - Fixing Assembly
    327
    
    Construction
    327
    
    Locking Mechanism
    327
    
    Removing the Fixing Cleaning Belt
    328
    
    Installing the Fixing Cleaning Belt
    330
    
    Removing the Upper Fixing Unit
    331
    
    Removing the Fixing Heater
    333
    
    Installing the Fixing Heater
    335
    
    Removing the Fixing Upper Roller
    335
    
    Installing the Upper Fixing Roller
    337
  - Removing the Thermal Switch
    338
  - Removing the Lower Separation Claw Assembly
    339
  - Removing the Lower Roller
    340
    
    Removing the Upper Separation Claw
    340
    
    Adjusting the Nip (Tightening the Pressure Adjusting Nut)
    341
  - Adjusting the Fixing Clutch
    342
- B. Delivery Assembly
  344
Chapter 7 Externals/Auxiliary Mechanisms

349
- Control Panel
  350
  - Outline
    350
  - Operation
    350
    
    Data Communication
    350
    
    LCD Processing
    351
    
    Automatic Control of LCD Contrast
    353
    
    Touch Switch Inputs
    354
- Fans
  355
  - II. Fans
    355
- Power Supply
  358
  - III. Power Supply
    358
  - Outline of Power Supply
    358
  - Power Supply Circuit
    359
  - Date/Time Display Power Supply
    361
- Disassembly and Assembly
  362
  - External Covers
    363
    
    Removing the Front Door
    364
    
    Removing the Inside Upper Cover
    365
    
    Cover
    366
    
    Removing the Fixing/Feeding Unit
    366
    
    Removing the Fixing/Feeding Unit Front Cover
    366
    
    Removing the Rear Cover
    366
    
    Sliding out the Hopper Assembly
    367
  - Removing the Process Unit
    367
  - Installing the Process Unit
    370
- Control Panel
  371
- Door Switch Assembly
  377
- Fan Unit
  379
  - Removing the Scanner Cooling Fan
    379
  - Removing the Exhaust Fan
    379
  - Removing the Fixing Heat Exhaust Fan
    380
    
    Removing the Developing Fan
    380
    
    Removing the Cleaner Fan
    381
    
    Removing the Feeding Fan
    382
  - Removing the Counter Assembly
    382
  - Main Motor Assembly
    383
    
    Removing the Main Motor
    383
  - Fixing/Waste Toner Drive Assembly
    384
    
    Construction
    384
    
    Removing the Waste Toner Bottle
    384
    
    Removing the Fixing/Waste Toner Drive Assembly
    384
  - Main Drive Assembly (Drum/Developing)
    387
    
    Construction
    387
    
    Removing
    387
    
    Construction
    389
    
    Removing
    389
  - Vertical Path Drive Assembly
    389
    
    Construction
    391
  - Pick-Up Drive Assembly
    391
    
    Removing
    392
  - Duplexing Drive (1) Assembly
    393
- Construction
  393
- Removing
  394
  - L. Lifter Drive Assembly
    395
    
    Construction
    395
    
    Removing
    395
    
    Construction
    397
    
    M. Cassette Pick-Up Drive Assembly
    397
- Removing
  397
  - Attaching the Drive Belt
    399
  - DC Controller PCB
    400
  - DC Power Supply Assembly
    401
  - High-Voltage Transformer Assembly
    402
  - Power Supply Inlet Assembly
    403

Canon NP6251 Service Bulletin

Canon NP6251 Service Bulletin (67 pages)

Brand: Canon | Category: Copier | Size: 1 MB

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