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
Service Manual1................................................................................................................................................................
Table Of Contents4................................................................................................................................................................
Regulation9................................................................................................................................................................
Safety Information11................................................................................................................................................................
Chapter 1 General13................................................................................................................................................................
Features13................................................................................................................................................................
Overview16................................................................................................................................................................
Specifications17................................................................................................................................................................
Printing17................................................................................................................................................................
Functions18................................................................................................................................................................
Electrical And Mechanical19................................................................................................................................................................
Network (for Hl-1270n Only)20................................................................................................................................................................
Paper20................................................................................................................................................................
Feedable Paper20................................................................................................................................................................
Paper Cassette Capacity22................................................................................................................................................................
Print Delivery22................................................................................................................................................................
Printing Area23................................................................................................................................................................
Effective Printing Area23................................................................................................................................................................
Print Guaranteed Area23................................................................................................................................................................
Chapter 2 Installation And Basic Operation25................................................................................................................................................................
Conditions Required For Installation25................................................................................................................................................................
Power Supply25................................................................................................................................................................
Environment25................................................................................................................................................................
System Requirements For Brother Printer Solution For Windows25................................................................................................................................................................
Unpacking26................................................................................................................................................................
Install The Printer27................................................................................................................................................................
For Windows Users27................................................................................................................................................................
For Windows Users With No Cd-rom Drive29................................................................................................................................................................
Install The Drum Unit29................................................................................................................................................................
Load Paper29................................................................................................................................................................
Print A Test Page29................................................................................................................................................................
Connect The Printer And The Computer30................................................................................................................................................................
Install The Printer Driver From Floppy Disk30................................................................................................................................................................
Using The Usb Interface31................................................................................................................................................................
Using The Usb Interface (for Windows 98 Only)31................................................................................................................................................................
Connect The Usb Interface Cable31................................................................................................................................................................
Install The Usb Driver31................................................................................................................................................................
Set The Pc Printer Port33................................................................................................................................................................
For Macintosh (imac And Power Macintosh) With Usb Users Only33................................................................................................................................................................
Paper Handling34................................................................................................................................................................
Load Paper Into The Paper Cassette34................................................................................................................................................................
Load Paper Manually34................................................................................................................................................................
Two Side Printing (manual Duplexing)35................................................................................................................................................................
To Print On Both Sides Of The Paper From The Paper Cassette35................................................................................................................................................................
To Print On Both Sides Of The Paper From The Manual Feed Slot36................................................................................................................................................................
Control Panel Operation37................................................................................................................................................................
Ready (paper) Led Indications37................................................................................................................................................................
Data (toner) Led Indications38................................................................................................................................................................
Drum Led Indications38................................................................................................................................................................
Alarm Led Indications38................................................................................................................................................................
Control Panel Button Operations39................................................................................................................................................................
Other Control Features39................................................................................................................................................................
Sleep Mode39................................................................................................................................................................
Test Print Mode40................................................................................................................................................................
Network Board Operation (for Hl-1270n Only)41................................................................................................................................................................
Preparing The Br-net Board41................................................................................................................................................................
Connect The Ethernet Cable41................................................................................................................................................................
Install The Bradmin32: Configuration Utility (for Windows 95/98/nt 4.0 Users Only)41................................................................................................................................................................
Print Configuration Page42................................................................................................................................................................
Led Functions42................................................................................................................................................................
Factory Default Setting42................................................................................................................................................................
Chapter 3 Theory Of Operation43................................................................................................................................................................
Electronics43................................................................................................................................................................
General Block Diagram43................................................................................................................................................................
Main Pcb Block Diagram46................................................................................................................................................................
Main Pcb49................................................................................................................................................................
Asic49................................................................................................................................................................
Rom52................................................................................................................................................................
Flash Rom54................................................................................................................................................................
Dram54................................................................................................................................................................
Optional Ram56................................................................................................................................................................
Optional Serial I/o57................................................................................................................................................................
Pci Bus57................................................................................................................................................................
Eeprom58................................................................................................................................................................
Reset Circuit58................................................................................................................................................................
Engine I/o59................................................................................................................................................................
Engine Pcb60................................................................................................................................................................
Br-net Pcb (for Hl-1270 Only)60................................................................................................................................................................
Low-voltage Power Supply61................................................................................................................................................................
High-voltage Power Supply62................................................................................................................................................................
Mechanics63................................................................................................................................................................
Overview Of Printing Mechanism63................................................................................................................................................................
Paper Transfer65................................................................................................................................................................
Paper Supply65................................................................................................................................................................
Paper Registration65................................................................................................................................................................
Paper Eject66................................................................................................................................................................
Sensors66................................................................................................................................................................
Cover Sensors A And B66................................................................................................................................................................
Toner Sensor67................................................................................................................................................................
Drum Unit67................................................................................................................................................................
Photosensitive Drum67................................................................................................................................................................
Primary Charger67................................................................................................................................................................
Transfer Roller67................................................................................................................................................................
Cleaner67................................................................................................................................................................
Toner Cartridge67................................................................................................................................................................
Print Process68................................................................................................................................................................
Charging68................................................................................................................................................................
Exposure Stage68................................................................................................................................................................
Developing69................................................................................................................................................................
Transfer70................................................................................................................................................................
Fixing Stage70................................................................................................................................................................
Chapter 4 Disassembly And Re-assembly71................................................................................................................................................................
Safety Precautions71................................................................................................................................................................
Disassembly Flow72................................................................................................................................................................
Disassembly Procedure73................................................................................................................................................................
Ac Cord73................................................................................................................................................................
Paper Cassette74................................................................................................................................................................
Network Board (for Hl-1270n Only)80................................................................................................................................................................
Front Cover81................................................................................................................................................................
Top Cover82................................................................................................................................................................
Main Cover83................................................................................................................................................................
Laser Unit85................................................................................................................................................................
Drive Unit86................................................................................................................................................................
Fixing Unit88................................................................................................................................................................
Base Plate99................................................................................................................................................................
Main Pcb Assy101................................................................................................................................................................
Lower Tray Relay Pcb Assy (for Hl-1250/1270n Only)101................................................................................................................................................................
Low-voltage Power Supply Pcb Assy102................................................................................................................................................................
Engine Pcb Assy / High-voltage Power Supply Pcb Assy104................................................................................................................................................................
Panel Pcb Assy106................................................................................................................................................................
Solenoid Assy106................................................................................................................................................................
Fan Motor Assy109................................................................................................................................................................
Toner Sensor Pcb Assy (light Emission)110................................................................................................................................................................
Toner Sensor Pcb Assy (light Reception)110................................................................................................................................................................
Paper Pick-up Roller Assy111................................................................................................................................................................
Paper Feed Roller Assy112................................................................................................................................................................
Outer Chute 1113................................................................................................................................................................
Packing114................................................................................................................................................................
Chapter 5 Periodic Maintenance115................................................................................................................................................................
Consumable Parts115................................................................................................................................................................
Periodical Replacement Parts118................................................................................................................................................................
Periodical Cleaning119................................................................................................................................................................
Cleaning The Printer Exterior119................................................................................................................................................................
Cleaning The Drum Unit119................................................................................................................................................................
Cleaning The Scanner Window120................................................................................................................................................................
Cleaning The Electrical Terminals120................................................................................................................................................................
Mtbf / Mttr121................................................................................................................................................................
Chapter 6 Troubleshooting123................................................................................................................................................................
Introduction123................................................................................................................................................................
Initial Check123................................................................................................................................................................
Warnings For Maintenance Work124................................................................................................................................................................
Identify The Problem125................................................................................................................................................................
Operator Calls & Service Calls126................................................................................................................................................................
Operator Calls126................................................................................................................................................................
Service Calls126................................................................................................................................................................
Error Messages128................................................................................................................................................................
Error Messages In The Status Monitor128................................................................................................................................................................
Error Message Printouts130................................................................................................................................................................
Paper Problems131................................................................................................................................................................
Paper Load Problems131................................................................................................................................................................
Paper Jams132................................................................................................................................................................
Clearing The Jammed Paper132................................................................................................................................................................
Causes & Countermeasures133................................................................................................................................................................
Paper Feeding Problems134................................................................................................................................................................
Software Setting Problems136................................................................................................................................................................
Malfunctions140................................................................................................................................................................
Image Defects145................................................................................................................................................................
Image Defect Examples145................................................................................................................................................................
Troubleshooting Image Defect146................................................................................................................................................................
Location Of Grounding Contacts163................................................................................................................................................................
Printer Body & Paper Cassette163................................................................................................................................................................
Incorrect Printout164................................................................................................................................................................
Network Problem (for Hl-1270n Only)167................................................................................................................................................................
Installation Problem167................................................................................................................................................................
Intermittent Problem168................................................................................................................................................................
Tcp/ip Troubleshooting169................................................................................................................................................................
Unix Troubleshooting169................................................................................................................................................................
Windows Nt/lan Server (tcp/ip) Troubleshooting170................................................................................................................................................................
Windows 95/98 Peer To Peer Print (lpr) Troubleshooting170................................................................................................................................................................
Windows 95/98 (or Later) Peer To Peer (hp Jetadmin Compatible Method) Troubleshooting171................................................................................................................................................................
Windows 95/98/nt 4.0 Peer To Peer Print (netbios) Troubleshooting171................................................................................................................................................................
Internet Print (tcp/ip) Troubleshooting171................................................................................................................................................................
Novell Netware Troubleshooting172................................................................................................................................................................
Appletalk Troubleshooting172................................................................................................................................................................
Apple Tcp/ip Printing (system 8.6 Or Later)173................................................................................................................................................................
Web Browser Troubleshooting (tcp/ip)173................................................................................................................................................................
Inspection Mode174................................................................................................................................................................
Serial No. Descriptions179................................................................................................................................................................
Diameter / Circumference Of Rollers181................................................................................................................................................................
Print Speeds With Various Settings182................................................................................................................................................................
How To Know Drum Unit Life & Page Counter183................................................................................................................................................................
How To Use The Self-diagnostics Tools189................................................................................................................................................................
Nvram Default Value193................................................................................................................................................................
Paper Cassette Information (for Europe Only194................................................................................................................................................................
Connection Diagram, Hl-1030/1240195................................................................................................................................................................
Connection Diagram, Hl-1250196................................................................................................................................................................
Connection Diagram, Hl-1270n197................................................................................................................................................................
Main Pcb Circuit Diagram, Hl-1030/1240 (1/2198................................................................................................................................................................
Main Pcb Circuit Diagram, Hl-1030/1240 (2/2199................................................................................................................................................................
Main Pcb Circuit Diagram, Hl-1250/1270n (1/5200................................................................................................................................................................
Main Pcb Circuit Diagram, Hl-1250/1270n (2/5201................................................................................................................................................................
Main Pcb Circuit Diagram, Hl-1250/1270n (3/5202................................................................................................................................................................
Main Pcb Circuit Diagram, Hl-1250/1270n (4/5203................................................................................................................................................................
Main Pcb Circuit Diagram, Hl-1250/1270n (5/5204................................................................................................................................................................
Engine Pcb Circuit Diagram (old205................................................................................................................................................................
Engine Pcb Circuit Diagram (new206................................................................................................................................................................
Network Board Circuit Diagram207................................................................................................................................................................
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 (old210................................................................................................................................................................
High-voltage Power Supply Pcb Circuit Diagram (new211................................................................................................................................................................
Differences Between Old & New Versions Of Hvps & Engine Pcb212................................................................................................................................................................
Parts Reference List219................................................................................................................................................................
Frame / Drive Unit222................................................................................................................................................................
Paper Feeder224................................................................................................................................................................
Covers231................................................................................................................................................................
Low-voltage Power Supply Pcb235................................................................................................................................................................
High-voltage Power Supply Pcb237................................................................................................................................................................
Ac Cords237................................................................................................................................................................
Accessories239................................................................................................................................................................
Packing Materials241................................................................................................................................................................
Network Board241................................................................................................................................................................
Adjusting Tool243................................................................................................................................................................

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