Canon LBP-CX Series Manuals

Manuals and User Guides for Canon LBP-CX Series. We have 1 Canon LBP-CX Series manual available for free PDF download: Service Manual

Canon LBP-CX Series Service Manual

Canon LBP-CX Series Service Manual (210 pages)

Brand: Canon | Category: Printer | Size: 19.13 MB

Table of Contents

Introduction
3
Table of Contents
5
General Description
9
Chapter 1 General Description

11
- Features
  11
- Specifications
  12
- Safety Information
  13
  - Laser Safety
    13
  - Additional Information
    13
  - CDRH Regulations
    13
  - Parts
    14
  - External View
    14
  - Cross Sectional View
    15
  - Operation
    16
  - Display Unit
    16
  - Test Switch
    16
  - Print Density Adjustment Dial
    16
  - Operating Procedure
    17
  - Flowchart
    17
  - Manual Feed
    18
  - Double-Sided Printing
    18
  - Operation and Timing
    19
Chapter 2 Operation and Timing

21
- Basic Operation
  21
  - Functions
    21
  - Main Drive
    22
  - Basic Sequence
    23
  - Wait
    23
  - Standby
    23
  - Last Rotation
    23
- Laser/Scanner
  24
  - Scanning Mirror
    24
  - Exposure, Image Formation
    24
  - Scanning a Rotating Drum
    24
  - Scanner Drive
    25
  - Driving the Scanner
    25
  - Print Unit
    26
  - Image Formation System
    26
  - Printing System
    26
  - Printing Signals
    26
  - Intr
    27
  - Lstr
    27
  - Print
    27
  - Printing Process
    28
  - Basic Process
    28
  - The Print Unit
    28
  - Printing Stages
    28
  - Primary Corona
    29
  - Preconditioning Exposure
    29
  - Scanning Exposure
    29
  - Surface Exposure
    29
  - Development Stage
    30
  - AC Bias
    30
  - Uniform Toner Application
    30
  - Tone Projection Development
    31
  - Toner Projection
    31
  - Transfer Stage
    32
  - Drum-Cleaning Stage
    32
  - Fixing Stage
    32
  - Drum Cleaning
    32
  - Auxiliary Processes
    33
  - Static-Charge Eliminators
    33
  - Ozone Filter
    33
  - Pickup/Feed System
    34
  - Casseette Feed
    35
  - Two Consecutive A4/Letter Size Prints
    35
  - Auxiliary Feed
    36
  - Two Consecutive Legal-Size Prints
    36
  - System Interface
    37
  - Handshaking Signals
    37
  - Printer Connection
    37
  - Interface Signals
    37
  - Video Signal
    38
  - BD Timing
    38
  - The Electrical System
    39
Chapter 3 The Electrical System

41
- Outline of the Electrical System
  41
- Reference Lists
  42
  - Component Symbols, Functions
    42
  - Layout of Electrical Components
    44
  - Printed Circuit Boards
    46
  - Signal List
    47
  - DC Controller
    47
  - PCB List
    48
  - Layouts of Electrical Components on Pcbs
    48
  - DC Power Supply & Main Motor Driver PCB
    49
  - High-Voltage Power Supply PCB
    49
  - Print Process
    50
  - Print Sequences
    50
  - Timing Chart for Loads and Function
    53
  - Semiconductor Laser
    55
  - Semiconductor
    55
  - Collimating Lens
    56
  - Scanning Mirror and Focusing Lenses
    56
  - Control Signals for Scanning
    56
  - Circuit Diagrams by Function
    58
  - DC Controller Circuit
    58
  - Input/Output Circuits
    59
  - Differential Inputs
    59
  - Thermistor
    59
  - Noise Suppression
    59
  - Output Circuits
    60
  - TTL Drivers
    60
  - Jam Detection
    61
  - Faulty Pickup Jam
    62
  - Outlet Delay Jam
    63
  - Outlet Stationary Jam
    64
  - The Multiplexer and Error-Detection Circuitry
    65
  - Checking the BD Pulse
    66
  - Detecting Paper in the Cassette
    67
  - BD Pulse Generated Normally
    67
  - Paper Detection
    67
  - IBD Pulse Early or Late
    67
  - Detecting the EP Cartridge in the Printer
    68
  - EP Cartridge Detection
    68
  - Control Circuits
    69
  - Zero Cross Sync Generator
    69
  - Acp1
    69
  - Fixing Roller Temperature Control Circuit
    70
  - Fixing Roller Heater Control
    71
  - Thermistor Malfunction
    71
  - Fixing Roller Temperature
    71
  - Triac Malfunction
    72
  - Laser Driver Circuit
    73
  - Generation of Laser Drive Signal
    74
  - Electron Beam Scanning
    74
  - Unblanking
    74
  - LD Signal Generation Timing Chart
    74
  - Laser Beam Intensity Control
    75
  - Laser Chip Temperature Control
    75
  - Blank Areas
    75
  - Horizontal Sync Generator Mechanism
    76
  - Laser Chip Thermistor Malfunction
    76
  - Beam Detect Pulse
    76
  - CPU Reset Circuit
    77
  - Timing between RESET and RES
    77
  - HVRST, RESET Timing
    77
  - CPU Malfunction Protection Timing
    77
  - High-Voltage Power Supply
    79
  - Generation of Primary Corona High Voltage
    79
  - Generation of Transfer Corona High Voltage
    79
  - Reset Circuitry
    80
  - Developing Bias Generation
    80
  - Main Motor Driver Circuit
    81
  - Main Motor Driver Timing Chart
    81
  - APC Voltage
    82
  - AFC Voltage
    82
  - Power Supplies
    84
  - Power Interlock Assembly
    84
  - DC Power Supply
    85
  - Power-Up Sequence
    85
  - Timing Chart for DC Controller Inputs/Outputs
    87
  - The Mechanical System
    88
- Externals
  90
  - Covers and Panels
    90
  - Top Cover
    90
  - Right and Left Panels
    90
  - Front Panel
    91
  - Print Tray
    91
  - Power Switch Unit
    91
  - Manual Feed Tray
    91
  - Door Switch
    92
  - Interface Connector
    93
  - Fan
    93
  - Removing the Fan
    93
  - Removing the Ozone Filter
    94
- Drive System
  95
- Main Motor
  95
- Paper Transport System
  96
  - Removing the Lower Roller
    96
  - Manual Pickup Roller
    96
  - Registration Shutter
    97
  - Transfer Guide
    98
  - Attaching the Transfer Guides
    99
  - Separation/Feeder Unit
    100
  - Feed Guide
    100
  - Removing the Separation/Feeder Unit
    100
  - Cassette Pickup Assembly
    101
  - Pickup Roller and Clutch Operation
    101
  - Removing the Pickup Roller
    102
  - Paper Detection Arm
    103
  - Cassette
    103
  - Removing the Paper Detection Arm
    103
  - Cassette Spring Force
    104
  - Exposure System
    105
  - Laser and Scanner Unit
    105
  - Laser Beam-Blocking Shutter
    105
  - Electrostatic Image/Developing/Cleaning System
    107
  - EP Cartridge
    107
  - Protective Shield
    107
  - Light Blocking Shutters
    107
  - Stringing the Corona Wires
    108
  - Transfer Corona Assembly
    108
  - Corona Wire Height
    109
  - Stringing the Guide Wire
    109
  - Fixing System
    110
  - Fixing Assembly
    110
  - Fixing Roller Cleaner Felt
    110
  - Removing the Upper Roller/Fixing Roller Heater
    111
  - Installing the Upper Roller/Fixing Roller Heater
    112
  - Attaching the Fixing Roller Heater
    112
  - Installing the Thermoprotector
    112
  - Fixing Roller Heater
    112
  - Installing the Lower Roller
    113
  - Procedure for Measuring Nip Width
    113
  - Nip Width
    113
  - Nip Width Measurement
    113
  - Removing the Separation Claws
    114
  - Electrical Components
    115
  - DC Controller PCB
    115
  - High Voltage Power Supply
    115
  - Transformer
    116
  - Scanner Driver PCB
    116
  - Installation
    118
  - Installation Suggestions
    120
  - Installation Space Requirements
    120
Chapter 4 The Mechanical System

120
Chapter 5 Installation

120
- Unpacking and Installation
  121
- Packing
  123
- Fixing Assembly Spacers
  123
- Wire Cleaner
  123
- Storing and Handling EP Cartridges
  126
- Storage Conditions
  126
- Conditions for Storage with Intact Packing Seal
  126
- Maintenance and Servicing
  128
- Expected Service Life of Consumables
  130
- List of Tools
  131
- List of Lubricants, Cleaners
  133
Chapter 6 Maintenance and Servicing

134
- Service Checkpoints
  134
- Customer Maintenance
  136
  - Printing Capacity Indicator
    136
  - Regular Servicing Checkpoints
    136
  - Replacing Consumables
    136
  - Separation Belt
    137
  - Primary Corona Wire
    138
  - Wire Cleaner and Separation Belt Location
    138
  - Transfer Corona Wire
    139
  - Troubleshooting
    140
  - Basic Procedure
    142
  - Initial Check
    142
- Introduction
  142
  - Printer Driver and Laser Driver Checker Operation
    143
- Check/Adjustment
  143
  - Mechanical Adjustment
    144
  - Adjusting the Cassette Spring Lifting Force
    144
  - Adjusting the Fixing Rollers (Nip Width)
    144
  - Adjusting the Height of the Transfer Corona Wire
    144
  - Image Adjustment
    144
  - Basic Image Adjustment
    144
    
    Electrical Adjustment
    146
    
    Leds and VR Settings
    146
    
    Setting Vrs
    146
    
    Checking the Input/Output Signals
    147
    
    DC Controller Signals
    147
  - Adjusting Laser Power
    148
  - Examples of Image Defects
    154
  - How to Read the Troubleshooting Tables
    155
  - Troubleshooting Image Defects
    156
  - Dark Image
    157
  - Blank Print
    158
  - Black Image
    159
  - Stained Separation Strip
    159
  - Stains on Back of Paper
    160
  - Dark Vertical Lines (Paper Feed Direction)
    160
  - Sharp Horizontal Black Lines (Cross Feed Direction)
    161
  - Vertical Fogged Stripes (Paper Feed Direction)
    161
  - I-11. White Horizontal Lines or Other Shapes on a Black Print
    162
  - I-12. Thin Vertical White Lines or Stripes (Paper Feed Direction)
    162
  - Faulty Registration
    163
Chapter 7 Troubleshooting

163
Appendix Dccontrollerpcb Layout

198
- DC Power Supply & Main Motor Driver Pcb Layout
  199
- Ac Driver Pcb Layout (Ac Controller Pcb, Fixing Roller Heater Safety Pcb
  200
- Varistor Pcb Layouts
  201
- Preconditioning Exposure
  201
  - Labels
    206
  - Location of Warning Labels
    206
  - Warning Labels
    207

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