Brother 1270N Manuals

Manuals and User Guides for Brother 1270N. We have 1 Brother 1270N manual available for free PDF download: Service Manual

Brother 1270N Service Manual

Brother 1270N Service Manual (243 pages)

Brother Laser Printer SERVICE MANUAL HL-1030, 1240, 1250, 1270N

Brand: Brother | Category: Printer | Size: 5.21 MB

Table of Contents

Table of Contents

4
- Service Manual
  1
- Regulation
  9
- Safety Information
  11
- Chapter 1 General
  
  13
  - Features
    13
  - Overview
    16
  - Specifications
    17
    
    Printing
    17
    
    Functions
    18
    
    Electrical and Mechanical
    19
    
    Feedable Paper
    20
    
    Network (for HL-1270N Only)
    20
    
    Paper
    20
    
    Paper Cassette Capacity
    22
    
    Print Delivery
    22
    
    Effective Printing Area
    23
    
    Print Guaranteed Area
    23
    
    Printing Area
    23
- Chapter 2 Installation and Basic Operation
  
  25
- Chapter 3 Theory of Operation
  
  43
  - Electronics
    43
    
    General Block Diagram
    43
    
    Main PCB Block Diagram
    46
    
    Asic
    49
    
    Main PCB
    49
    
    Rom
    52
    
    Dram
    54
    
    Flash ROM
    54
    
    Optional RAM
    56
    
    Optional Serial I/O
    57
    
    PCI Bus
    57
    
    Eeprom
    58
    
    Reset Circuit
    58
    
    Engine I/O
    59
    
    BR-Net PCB (for HL-1270 Only)
    60
    
    Engine PCB
    60
    
    Low-Voltage Power Supply
    61
    
    Power Supply
    61
    
    High-Voltage Power Supply
    62
  - Mechanics
    63
    
    Overview of Printing Mechanism
    63
    
    Paper Registration
    65
    
    Paper Supply
    65
    
    Paper Transfer
    65
    
    Cover Sensors a and B
    66
    
    Paper Eject
    66
    
    Sensors
    66
    
    Cleaner
    67
    
    Drum Unit
    67
    
    Photosensitive Drum
    67
    
    Primary Charger
    67
    
    Toner Cartridge
    67
    
    Toner Sensor
    67
    
    Transfer Roller
    67
    
    Charging
    68
    
    Exposure Stage
    68
    
    Print Process
    68
    
    Developing
    69
    
    Fixing Stage
    70
    
    Transfer
    70
- Chapter 4 Disassembly and Re-Assembly
  
  71
  - Safety Precautions
    71
  - Disassembly Flow
    72
  - Disassembly Procedure
    73
    
    AC Cord
    73
    
    Drum Unit
    73
    
    Paper Cassette
    74
    
    Network Board (for HL-1270N Only)
    80
    
    Front Cover
    81
    
    Top Cover
    82
    
    Main Cover
    83
    
    Laser Unit
    85
    
    Drive Unit
    86
    
    Fixing Unit
    88
    
    Base Plate
    99
    
    Lower Tray Relay PCB ASSY (for HL-1250/1270N Only)
    101
    
    Main PCB ASSY
    101
    
    Low-Voltage Power Supply PCB ASSY
    102
    
    Engine PCB ASSY / High-Voltage Power Supply PCB ASSY
    104
    
    Panel PCB ASSY
    106
    
    Solenoid ASSY
    106
    
    Fan Motor ASSY
    109
    
    Toner Sensor PCB ASSY (Light Emission)
    110
    
    Toner Sensor PCB ASSY (Light Reception)
    110
    
    Paper Pick-Up Roller ASSY
    111
    
    Paper Feed Roller ASSY
    112
    
    Outer Chute 1
    113
  - Packing
    114
- Chapter 5 Periodic Maintenance
  
  115
  - Consumable Parts
    115
    
    Drum Unit
    115
    
    Toner Cartridge
    116
  - Periodical Replacement Parts
    118
  - Periodical Cleaning
    119
    
    Cleaning the Drum Unit
    119
    
    Cleaning the Printer Exterior
    119
    
    Cleaning the Electrical Terminals
    120
    
    Cleaning the Scanner Window
    120
  - Mtbf / Mttr
    121
- Chapter 6 Troubleshooting
  
  123
  - Introduction
    123
    
    Initial Check
    123
    
    Warnings for Maintenance Work
    124
    
    Identify the Problem
    125
  - Operator Calls & Service Calls
    126
    
    Operator Calls
    126
    
    Service Calls
    126
  - Error Messages
    128
    
    Error Messages in the Status Monitor
    128
    
    Error Message Printouts
    130
  - Paper Problems
    131
    
    Paper Load Problems
    131
    
    Clearing the Jammed Paper
    132
    
    Paper Jams
    132
    
    Causes & Countermeasures
    133
    
    Paper Feeding Problems
    134
  - Software Setting Problems
    136
  - Malfunctions
    140
  - Image Defects
    145
    
    Image Defect Examples
    145
    
    Troubleshooting Image Defect
    146
    
    Drum Unit
    163
    
    Location of Grounding Contacts
    163
    
    Printer Body & Paper Cassette
    163
  - Incorrect Printout
    164
  - Network Problem (for Hl-1270N Only)
    167
    
    Installation Problem
    167
    
    Intermittent Problem
    168
    
    TCP/IP Troubleshooting
    169
    
    UNIX Troubleshooting
    169
    
    Windows 95/98 Peer to Peer Print (LPR) Troubleshooting
    170
    
    Windows NT/LAN Server (TCP/IP) Troubleshooting
    170
    
    Internet Print (TCP/IP) Troubleshooting
    171
    
    Windows 95/98 (or Later) Peer to Peer (HP Jetadmin Compatible Method) Troubleshooting
    171
    
    Windows 95/98/NT 4.0 Peer to Peer Print (Netbios) Troubleshooting
    171
    
    Appletalk Troubleshooting
    172
    
    Novell Netware Troubleshooting
    172
    
    Apple TCP/IP Printing (System 8.6 or Later)
    173
    
    Web Browser Troubleshooting (TCP/IP)
    173
  - Inspection Mode
    174
    
    Test Print Mode
    174
    
    Inspection Mode
    175
  - Serial No. Descriptions
    179
  - Diameter / Circumference of Rollers
    181
  - Print Speeds with Various Settings
    182
  - How to Know Drum Unit Life & Page Counter
    183
  - How to Use the Self-Diagnostics Tools
    189
  - Nvram Default Value
    193
  - Paper Cassette Information (for Europe Only
    194
  - Connection Diagram, Hl-1030/1240
    195
  - Connection Diagram, Hl-1250
    196
  - Connection Diagram, Hl-1270N
    197
  - Main Pcb Circuit Diagram, Hl-1030/1240 (1/2
    198
  - Main Pcb Circuit Diagram, Hl-1030/1240 (2/2
    199
  - Main Pcb Circuit Diagram, Hl-1250/1270N (1/5
    200
  - Main Pcb Circuit Diagram, Hl-1250/1270N (2/5
    201
  - Main Pcb Circuit Diagram, Hl-1250/1270N (3/5
    202
  - Main Pcb Circuit Diagram, Hl-1250/1270N (4/5
    203
  - Main Pcb Circuit Diagram, Hl-1250/1270N (5/5
    204
  - Engine Pcb Circuit Diagram (Old
    205
  - Engine Pcb Circuit Diagram (New
    206
  - Network Board Circuit Diagram
    207
  - Low-Voltage Power Supply Pcb Circuit Diagram (110 - 120V)
    208
  - Low-Voltage Power Supply Pcb Circuit Diagram (220 - 240V)
    209
  - High-Voltage Power Supply Pcb Circuit Diagram (Old
    210
  - High-Voltage Power Supply Pcb Circuit Diagram (New
    211
  - Differences between Old & New Versions of Hvps & Engine Pcb
    212
    
    Parts Reference List
    219
Table of Contents

221
- Frame / Drive Unit
  222
- Laser Unit
  222
- Paper Feeder
  224
- Fixing Unit
  226
- Paper Cassette
  230
- Covers
  231
- Main Pcb
  234
- Engine Pcb
  235
- Low-Voltage Power Supply Pcb
  235
- Ac Cords
  237
- High-Voltage Power Supply Pcb
  237
- Accessories
  239
- Network Board
  241
- Packing Materials
  241
- Adjusting Tool
  243

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