Brother HL-1870N Service Manual
Brother Laser Printer
SERVICE MANUAL
MODEL: HL-1850/1870N
Read this manual thoroughly before maintenance work.
Keep this manual in a convenient place for quick and easy reference at all times.
January 2002
SM-PRN031
© Copyright Brother Industries, Ltd. 2002
All rights reserved.
No part of this publication may be reproduced in any form or by any means without permission
in writing from the publisher.
Specifications are subject to change without notice.
Trademarks:
The brother logo is a registered trademark of Brother Industries, Ltd.
Apple, the Apple Logo, and Macintosh are trademarks, registered in the United States and
other countries, and TrueType is a trademark of Apple computer, Inc.
Epson is a registered trademark and FX-80 and FX-850 are trademarks of Seiko Epson
Corporation.
Hewlett Packard is a registered trademark and HP LaserJet is a trademark of Hewlett Packard
Company.
IBM, IBM PC and Proprinter are registered trademarks of International Business Machines
Corporation.
Microsoft and MS-DOS are registered trademarks of Microsoft Corporation.
Windows is a registered trademark of Microsoft Corporation in the U.S. and other countries.
HL-1850/1870N SERVICE MANUAL
PREFACE
This service manual contains basic information required for after-sales service of the laser
printer (hereinafter referred to as "this machine" or "the printer"). This information is vital to the
service technician to maintain the high printing quality and performance of the printer.
This service manual covers the HL-1850/1870N printers.
This manual consists of the following chapters:
CHAPTER 1: GENERAL
Features, specifications, etc.
CHAPTER 2: INSTALLATION AND BASIC OPERATION
Installation conditions, Installation procedures, basic operation of the printer
etc.
CHAPTER 3: THEORY OF OPERATION
Basic operation of the mechanical system, the electrical system and the
electrical circuits and their timing information.
CHAPTER 4: DISASSEMBLY AND RE-ASSEMBLY
Procedures for disassembling and re-assembling the mechanical system.
CHAPTER 5: PERIODIC MAINTENANCE
Periodical replacements parts, consumable parts, etc.
CHAPTER 6: TROUBLESHOOTING
Reference values and adjustments, troubleshooting image defects,
troubleshooting malfunctions, etc.
CHAPTER 7: HIDDEN FUNCTIONS
Professional menu mode and Service menu mode, etc.
APPENDICES: Serial No. descriptions, Drum life & page counter, Diameter / circumference
of rollers, Connection diagrams, PCB circuit diagrams, etc.
Information in this manual is subject to change due to improvement or redesign of the product.
All relevant information in such cases will be supplied in service information bulletins
(Technical Information).
A thorough understanding of this printer, based on information in this service manual and
service information bulletins, is required for maintaining its print quality performance and for
improving the practical ability to find the cause of problems.
i
TABLE OF CONTENTS
TABLE OF CONTENTS
REGULATION.............................................................................................viii
SAFETY INFORMATION...............................................................................x
CHAPTER 1 GENERAL .......................................................................... 1-1
1. FEATURES .............................................................................................................1-1
2. OVERVIEW .............................................................................................................1-3
3. SPECIFICATIONS...................................................................................................1-4
3.1 Printing ............................................................................................................................. 1-4
3.2 Functions.......................................................................................................................... 1-5
3.3 Electrical and Mechanical ................................................................................................ 1-6
3.4 Network ............................................................................................................................ 1-7
3.5 Paper................................................................................................................................ 1-8
3.5.1 Feedable paper................................................................................................................... 1-8
3.5.2 Paper cassette capacity....................................................................................................1-10
3.5.3 Print delivery ..................................................................................................................... 1-10
3.6 Printing Area................................................................................................................... 1-11
3.6.1 PCL5e/EPSON/IBM emulation.......................................................................................... 1-11
3.6.2 PCL6/BR-Script3 emulation .............................................................................................. 1-14
CHAPTER 2 INSTALLATION AND BASIC OPERATION ...................... 2-1
1. CONDITIONS REQUIRED FOR INSTALLATION....................................................2-1
1.1 Power Supply ................................................................................................................... 2-1
1.2 Environment ..................................................................................................................... 2-1
®
1.3 System Requirements for Brother Printer Solution for Windows
2. UNPACKING ...........................................................................................................2-2
3. INSTALL THE PRINTER .........................................................................................2-3
3.1 For All Users .................................................................................................................... 2-3
3.1.1 Install the drum unit assembly ............................................................................................ 2-4
3.1.2 Load paper into the paper cassette .................................................................................... 2-4
3.1.3 Print a test page.................................................................................................................. 2-5
3.2 For Windows® Users ........................................................................................................ 2-6
3.3 For Macintosh Users ...................................................................................................... 2-10
4. PRINTING METHODS...........................................................................................2-12
4.1 Printing from the Paper Cassette ................................................................................... 2-12
4.2 Printing from Multi-purpose Tray .................................................................................... 2-12
4.2.1 Printing on envelopes (Face up printing) .......................................................................... 2-14
4.2.2 Printing on label, transparency, etc. ................................................................................. 2-15
4.3 Printing to the Face up Output Tray (Face up Printing) ................................................. 2-17
4.4 Printing on Both Sides of the Paper (Duplex Printing) ................................................... 2-17
4.5 Manual Feed ..................................................................................................................2-18
.................................... 2-1
ii
HL-1850/1870N SERVICE MANUAL
5. CONTROL PANEL OPERATION...........................................................................2-19
5.1 Data LED Indications ..................................................................................................... 2-19
5.2 Panel Switches Functions .............................................................................................. 2-20
5.2.1 Go switch .......................................................................................................................... 2-20
5.2.2 Job Cancel switch............................................................................................................. 2-20
5.2.3 Reprint switch ................................................................................................................... 2-21
5.2.4 + & - switch ....................................................................................................................... 2-24
5.2.5 Set switch ......................................................................................................................... 2-24
5.2.6 Back switch....................................................................................................................... 2-24
5.3 LCD Display ................................................................................................................... 2-24
5.3.1 Backlights ......................................................................................................................... 2-25
5.3.2 Printer status messages ................................................................................................... 2-26
5.4 How to Use the Control Panel........................................................................................ 2-27
5.5 Control Panel Setting Menu ........................................................................................... 2-28
5.5.1 Information........................................................................................................................ 2-29
5.5.2 Paper ................................................................................................................................ 2-29
5.5.3 Quality............................................................................................................................... 2-30
5.5.4 Setup ................................................................................................................................ 2-30
5.5.5 Print menu......................................................................................................................... 2-31
5.5.6 Network............................................................................................................................. 2-34
5.5.7 Interface............................................................................................................................ 2-34
5.5.8 Reset menu....................................................................................................................... 2-35
5.5.9 Set IP address .................................................................................................................. 2-35
5.5.10 About emulation modes .................................................................................................... 2-36
5.5.11 List of factory settings ....................................................................................................... 2-36
5.6 Other Control Features .................................................................................................. 2-40
5.6.1 Sleep mode....................................................................................................................... 2-40
5.6.2 Inspection mode ............................................................................................................... 2-40
6. NETWORK BOARD OPERATION.........................................................................2-41
6.1 Installing the Network Board .......................................................................................... 2-41
6.2 Functions........................................................................................................................ 2-43
6.2.1 LED functions ................................................................................................................... 2-43
6.2.2 Factory default setting ...................................................................................................... 2-43
CHAPTER 3 THEORY OF OPERATION ................................................ 3-1
1. ELECTRONICS .......................................................................................................3-1
1.1 General Block Diagram .................................................................................................... 3-1
1.2 Main PCB Block Diagram................................................................................................. 3-2
1.3 Main PCB ......................................................................................................................... 3-3
1.3.1 ASIC.................................................................................................................................... 3-3
1.3.2 ROM.................................................................................................................................... 3-5
1.3.3 Flash ROM.......................................................................................................................... 3-6
1.3.4 SDRAM ............................................................................................................................... 3-7
1.3.5 Optional RAM...................................................................................................................... 3-9
1.3.6 PCI bus ............................................................................................................................. 3-10
1.3.7 EEPROM .......................................................................................................................... 3-11
1.3.8 Reset circuit ...................................................................................................................... 3-11
iii
TABLE OF CONTENTS
1.3.9 Engine I/O......................................................................................................................... 3-12
1.3.10 Panel I/O ........................................................................................................................... 3-12
1.4 Engine PCB.................................................................................................................... 3-13
1.5 BR-net PCB.................................................................................................................... 3-13
1.6 Power Supply .................................................................................................................3-14
1.6.1 Low-voltage Power Supply ............................................................................................... 3-14
1.6.2 High-voltage Power Supply............................................................................................... 3-15
2. MECHANICS ......................................................................................................... 3-16
2.1 Overview of Printing Mechanism.................................................................................... 3-16
2.2 Paper Transfer ...............................................................................................................3-18
2.2.1 Paper supply..................................................................................................................... 3-18
2.2.2 Paper registration ............................................................................................................. 3-18
2.2.3 Paper eject........................................................................................................................ 3-19
2.2.4 Duplex printing.................................................................................................................. 3-19
2.3 Sensors .......................................................................................................................... 3-20
2.3.1 Cover sensors................................................................................................................... 3-20
2.3.2 Toner sensors................................................................................................................... 3-20
2.3.3 DX tray sensor / DX paper size sensor............................................................................. 3-21
2.3.4 Rear cover sensor ............................................................................................................ 3-21
2.3.5 Cassette sensor / Paper empty sensor............................................................................. 3-22
2.3.6 Paper eject sensor............................................................................................................ 3-22
2.4 Drum Unit ....................................................................................................................... 3-23
2.4.1 Photosensitive drum ......................................................................................................... 3-23
2.4.2 Primary charger ................................................................................................................ 3-23
2.4.3 Transfer roller ................................................................................................................... 3-23
2.4.4 Cleaner ............................................................................................................................. 3-23
2.5 Toner Cartridge ..............................................................................................................3-23
2.6 Print Process.................................................................................................................. 3-23
2.6.1 Charging ........................................................................................................................... 3-23
2.6.2 Exposure stage................................................................................................................. 3-24
2.6.3 Developing........................................................................................................................ 3-25
2.6.4 Transfer ............................................................................................................................ 3-25
2.6.5 Fixing stage ...................................................................................................................... 3-26
CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY.............................. 4-1
1. SAFETY PRECAUTIONS ........................................................................................4-1
2. DISASSEMBLY FLOW ............................................................................................4-2
3. DISASSEMBLY PROCEDURE ................................................................................4-3
3.1 AC Cord ........................................................................................................................... 4-3
3.2 Drum Unit ......................................................................................................................... 4-3
3.3 Paper Cassette ................................................................................................................ 4-4
3.4 Network Board (For HL-1870N only).............................................................................. 4-11
3.5 Top Cover ...................................................................................................................... 4-12
3.6 DX Feed ASSY............................................................................................................... 4-16
3.7 Rear Cover..................................................................................................................... 4-20
3.8 Rear Cover R & L / Side Cover R & L ............................................................................ 4-22
3.9 MP Cover ASSY............................................................................................................. 4-23
iv
HL-1850/1870N SERVICE MANUAL
3.10 Process Unit Cover ASSY.............................................................................................. 4-25
3.11 Laser Unit....................................................................................................................... 4-26
3.12 Fixing Unit ...................................................................................................................... 4-27
3.13 Paper Pick-up Roller ASSY............................................................................................ 4-39
3.14 Feed MP Unit ................................................................................................................. 4-40
3.15 Drive Unit ....................................................................................................................... 4-42
3.16 Low-voltage Power Supply PCB ASSY.......................................................................... 4-47
3.17 Main PCB ASSY............................................................................................................. 4-48
3.18 Fan Motor / Fan Motor 60 .............................................................................................. 4-48
3.19 Base Plate...................................................................................................................... 4-49
3.20 Engine PCB ASSY / High-voltage Power Supply PCB ASSY........................................ 4-49
3.21 DX Sensor PCB ASSY................................................................................................... 4-51
3.22 Toner Sensor PCB Unit (Light Reception) ..................................................................... 4-52
3.23 Toner LED PCB Unit (Light Emission) ........................................................................... 4-52
3.24 Paper Feed Roller ASSY................................................................................................ 4-53
3.25 First Feed Roller ASSY .................................................................................................. 4-53
3.26 Exit Roller Unit................................................................................................................ 4-55
3.27 Harness Winding Form .................................................................................................. 4-57
4. PACKING ..............................................................................................................4-58
CHAPTER 5 PERIODIC MAINTENANCE............................................... 5-1
1. CONSUMABLE PARTS...........................................................................................5-1
1.1 Drum Unit ......................................................................................................................... 5-1
1.2 Toner Cartridge ................................................................................................................ 5-2
2. PERIODICAL REPLACEMENT PARTS...................................................................5-5
3. PERIODICAL CLEANING........................................................................................5-6
3.1 Cleaning the Printer Exterior ............................................................................................ 5-6
3.2 Cleaning the Drum Unit .................................................................................................... 5-6
3.3 Cleaning the Scanner Window ......................................................................................... 5-7
3.4 Cleaning the Electrical Terminals..................................................................................... 5-8
4. MTBF / MTTR..........................................................................................................5-9
CHAPTER 6 TROUBLESHOOTING ....................................................... 6-1
1. INTRODUCTION .....................................................................................................6-1
1.1 Initial Check...................................................................................................................... 6-1
1.2 Warnings for Maintenance Work ...................................................................................... 6-2
1.3 Identify the Problem .........................................................................................................6-3
2. OPERATOR CALLS & SERVICE CALLS ................................................................6-4
2.1 Operator Calls .................................................................................................................. 6-4
2.2 Service Calls .................................................................................................................... 6-6
3. PAPER PROBLEMS................................................................................................6-9
3.1 Paper Loading Problems.................................................................................................. 6-9
3.2 Paper Jams .................................................................................................................... 6-10
3.2.1 Clearing jammed paper..................................................................................................... 6-11
v
TABLE OF CONTENTS
3.2.2 Causes & countermeasures.............................................................................................. 6-19
3.3 Paper Feeding Problems ............................................................................................... 6-20
4. SOFTWARE SETTING PROBLEMS .....................................................................6-22
5. MALFUNCTIONS ..................................................................................................6-25
6. IMAGE DEFECTS .................................................................................................6-31
6.1 Image Defect Examples ................................................................................................. 6-31
6.2 Troubleshooting Image Defect ....................................................................................... 6-32
6.3 Location of Grounding Contacts..................................................................................... 6-50
6.3.1 Drum unit .......................................................................................................................... 6-50
6.3.2 Printer body & Paper cassette .......................................................................................... 6-50
7. INCORRECT PRINTOUT ......................................................................................6-51
8. NETWORK PROBLEM..........................................................................................6-54
8.1 Installation Problem........................................................................................................ 6-54
8.2 Intermittent Problem ....................................................................................................... 6-55
8.3 TCP/IP Troubleshooting ................................................................................................. 6-56
8.4 UNIX Troubleshooting.................................................................................................... 6-56
8.5 Windows NT/LAN Server (TCP/IP) Troubleshooting ..................................................... 6-57
8.6 Windows 95/98/Me (or later) Peer to Peer Print (LPR) Troubleshooting ....................... 6-57
8.7 Windows 95/98/Me (or later) Peer to Peer (HP JetAdmin Compatible Method) Troubleshooting .....
....................................................................................................................................... 6-58
8.8 Windows 95/98/Me/NT 4.0/2000 (or later) Peer to Peer Print (NetBIOS) Troubleshooting ...
....................................................................................................................................... 6-58
8.9 Internet Print (TCP/IP) Troubleshooting ......................................................................... 6-58
8.10 Novell Netware Troubleshooting .................................................................................... 6-59
8.11 AppleTalk Troubleshooting ............................................................................................ 6-59
8.12 Apple TCP/IP Printing (System 8.6 or later)................................................................... 6-60
8.13 Web Browser Troubleshooting (TCP/IP)........................................................................ 6-60
9. INSPECTION MODE .............................................................................................6-61
9.1 Entering Inspection Mode .............................................................................................. 6-61
9.2 Sensor Check Mode....................................................................................................... 6-62
CHAPTER 7 HIDDEN FUNCTIONS ........................................................ 7-1
1. ENTERING HIDDEN FUNCTION MENU MODES ...................................................7-1
2. PROFESSIONAL MENU MODE..............................................................................7-2
2.1 Enabling and Disabling Professional Menu Mode............................................................ 7-2
2.2 Function Table ................................................................................................................. 7-3
3. SERVICE MENU MODE..........................................................................................7-7
3.1 Entering the Service Menu Mode ..................................................................................... 7-7
3.2 Function Table ................................................................................................................. 7-7
4. OTHER HIDDEN FUNCTION MENUS ....................................................................7-9
4.1 Hidden Function Menus Enabled by Pressing Switch(es) When Turning the Machine on ....
......................................................................................................................................... 7-9
4.2 Drum Life Reset Function ................................................................................................ 7-9
4.3 Parts life Reset Function .................................................................................................. 7-9
vi
HL-1850/1870N SERVICE MANUAL
APPENDICES
1. CONNECTION DIAGRAM, HL-1850/1870N........................................................... A-1
2. MAIN PCB CIRCUIT DIAGRAM, HL-1850/1870N (1/6) .......................................... A-2
3. MAIN PCB CIRCUIT DIAGRAM, HL-1850/1870N (2/6) .......................................... A-3
4. MAIN PCB CIRCUIT DIAGRAM, HL-1850/1870N (3/6) .......................................... A-4
5. MAIN PCB CIRCUIT DIAGRAM, HL-1850/1870N (4/6) .......................................... A-5
6. MAIN PCB CIRCUIT DIAGRAM, HL-1850/1870N (5/6) .......................................... A-6
7. MAIN PCB CIRCUIT DIAGRAM, HL-1850/1870N (6/6) .......................................... A-7
8. ENGINE PCB CIRCUIT DIAGRAM, HL-1850/1870N (1/2) ..................................... A-8
9. ENGINE PCB CIRCUIT DIAGRAM, HL-1850/1870N (2/2) ..................................... A-9
10. NETWORK BOARD PCB CIRCUIT DIAGRAM, HL-1850/1870N.......................... A-10
11. LOW-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM (100V) ................. A-11
12. LOW-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM (200V) ................. A-12
13. HIGH-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM ............................ A-13
14. SERIAL NO. DESCRIPTIONS.............................................................................. A-14
15. DIAMETER / CIRCUMFERENCE OF ROLLERS.................................................. A-16
16. PRINT SPEEDS WITH VARIOUS SETTINGS...................................................... A-17
17. HOW TO KNOW DRUM UNIT LIFE & PAGE COUNTER .................................... A-18
18. HOW TO USE THE SELF-DIAGNOSTICS TOOLS ............................................. A-23
19. NVRAM DEFAULT VALUE................................................................................... A-27
20. PAPER CASSETTE INFORMATION (FOR EUROPE ONLY)............................... A-28
21. GUIDELINES FOR LEAD FREE SOLDER (MAIN PCB ASSY) .......................... A-29
22. HOW TO REWRITE HL-1850/1870N FLASH ROM ............................................. A-30
INDEX
vii
REGULATION
REGULATION
LASER SAFETY (110 - 120V MODEL ONLY)
This printer is certified as a Class 1 laser product under the US Department of Health and
Human Services (DHHS) Radiation Performance Standard according to the Radiation
Control for Health and Safety Act of 1968. This means that the printer does not produce
hazardous laser radiation.
Since radiation emitted inside the printer is completely confined within the protective
housing and external covers. the laser beam cannot escape form the machine during any
phase of user operation.
FDA REGULATIONS (110 - 120V MODEL ONLY)
The US Food and Drug Administration (FDA) has implemented regulations for laser
products manufactured on and after August 2, 1976. Compliance is mandatory for
products marketed in the United States. One of the following labels on the back of the
printer indicates compliance with the FDA regulations and must be attached to laser
products marketed in the United States.
The label for Japanese manufactured products
MANUFACTURED: K
BROTHER INDUSTRIES, LTD.
15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561,
Japan.
This product complies with FDA radiation performance
standards, 21 CFR Subchapter J.
The label for Chinese manufactured products
MANUFACTURED: C
BROTHER Corporation (Asia) Ltd.
Shenzen Buji Nan Ling Factory
Gold Garden Ind., Nan Ling Village, Buji, Rong Gang,
Shenzen, CHINA
This product complies with FDA radiation performance
standards, 21 CFR Subchapter J.
Caution
Use of controls, adjustments or performance of procedures other than those specified in
this manual may result in hazardous radiation exposure.
viii
HL-1850/1870N SERVICE MANUAL
IEC 825 (220-240V MODEL ONLY)
This printer is a Class 1 laser product as defined in IEC 825 specifications. The label
shown below is attached in countries where required.
This printer has a laser diode which emits invisible laser radiation in the Laser Unit. The
Laser Unit should not be opened without disconnecting the two connectors connected with
the AC power supply and laser unit. Since the variable resistor in the laser unit is adjusted
in accordance with the standards, never touch it.
Caution
Use of controls, adjustments or performance of procedures other than those specified in
this manual may result in hazardous radiation exposure.
For Finland and Sweden
LUOKAN 1 LASERLAITE
KLASS 1 LASER APPARAT
Varoitus! Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa
altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle.
Varning Om apparaten används på annat sätt än i denna Bruksanvisning specificerats,
kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laserklass
1.
ix
SAFETY INFORMATION
CAUTION FOR LASER PRODUCT (WARNHINWEIS FUR LASER DRUCKER)
CAUTION: When the machine during servicing is operated with the cover open, the
CAUTION: In case of any trouble with the laser unit, replace the laser unit itself. To
ACHTUNG: Im Falle von Störungen der Lasereinheit muß diese ersetzt werden. Das
<Location of the laser beam window>
SAFETY INFORMATION
regulations of VBG 93 and the performance instructions for VBG 93 are
valid.
prevent direct exposure to the laser beam, do not try to open the enclosure
of the laser unit.
Gehäuse der Lasereinheit darf nicht geöffnet werden, da sonst
Laserstrahlen austreten können.
ADDITIONAL INFORMATION
When servicing the optical system of the printer, be careful not to place a screwdriver or
other reflective object in the path of the laser beam. Be sure to take off any personal
accessories such as watches and rings before working on the printer. A reflected beam,
though invisible, can permanently damage the eyes.
Since the beam is invisible, the following caution label is attached on the laser unit.
x
CAUTION
ADVARSEL
VARNING
VARO!
ADVARSEL
ATTENTION
VORSICHT
ATENCIÓN
INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCK DEFEATED.
AVOID DIRECT EXPOSURE TO BEAM. CLASS 3B LASER PRODUCT.
USYNLIG LASER STRÅLING NÅR KABINETLÅGET STÅR ÅBENT.
UNGDÅ DIREKTE UDSÆTTELSE FOR STRÅLING. KLASSE 3B LASER.
OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRRAR
ÄR URKOPPLADE. STRÅLEN ÄR FARLIG. KLASS 3B LASER APPARAT.
AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA
NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN. LUOKAN
3B LASERLAITE.
USYNLIG LASERSTRÅLING.UNNGÅ DIREKTE KONTAKT MED LASERENHETEN
NÅR TOPPDEKSELET ER ÅPENT. KLASSE 3B LASERPRODUKT.
RADIATIONS LASER INVISIBLES QUANDOUVERT ET VERROUILLAGE ENLEVE.
EVITER EXPOSITIONS DIRECTES AU FAISCEAU. PRODUIT LASER CLASSE 3B.
UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG
GEÖFFENT UND SICHERHEITSVERRIEGELUNG
ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.
SICHERHEITSKLASSE 3B.
RADIACIÓN LASER INVISIBLE CUANDO SE ABRE
LA TAPA Y EL INTERRUPTOR INTERNO ESTÁ
ATASCADO. EVITE LA EXPOSICIÓN DIRECTA
DE LOS OJOS. PRODUCTO LASER CLASE 3B.
HL-1850/1870N SERVICE MANUAL
xi
SAFETY INFORMATION
DEFINITIONS OF WARNINGS, CAUTIONS AND NOTES
The following conventions are used in this service manual:
Indicates warnings that must be observed to prevent possible personal injury.
!
Indicates cautions that must be observed to service the printer properly or prevent damage
to the printer.
NOTE:
Indicates notes and useful tips to remember when servicing the printer.
**Listed below are the various kinds of WARNING messages included in this manual.
WARNING
CAUTION:
WARNING
Always turn off the power switch and unplug the power cord from the power outlet
before accessing any parts inside the printer.
WARNING
Some parts inside the printer are extremely hot immediately after the printer is used.
When opening the front cover or rear cover to access any parts inside the printer,
never touch the red colored parts shown in the following figures.
WARNING
If you analyze malfunctions with the power plug inserted into the power outlet,
special caution should be exercised even if the power switch is OFF because it is a
single pole switch.
xii
HL-1850/1870N SERVICE MANUAL
xiii
CHAPTER 1 GENERAL
1. FEATURES
This printer has the following features;
High Resolution and Fast Print Speed
True 600 x 600 dots / true 300 x 300 dots per inch (dpi) and 2400 x 600 dots per inch (dpi) for
graphics with microfine toner and up to 18 pages per minutes (ppm) print speed for A4 and 19
pages per minutes (ppm) print speed for Letter paper.
Versatile Paper Handling
The printer loads paper automatically from the paper cassette. The paper cassette can hold
A4, letter, B5 (ISO), B5 (JIS), A5, B6 (ISO), A6, Executive and Legal sizes of paper. The
manual feed slot allows manual paper loading sheet by sheet so you can use a variety of types
and sizes of paper.
HL-1850/1870N SERVICE MANUAL
Front Operation
Basic operation of the printer can be controlled from the control panel.
Enhanced Printing Performance and User-Friendly Operation for Windows
The dedicated printer driver for Microsoft Windows 95/98/Me, Windows NT 4.0 and
Windows
install them into your Windows
unique compression mode to enhance printing speed in Windows
2000/XP are available on the CD-ROM supplied with your printer. You can easily
system using our installer program. The driver supports our
applications and allows you
to choose various printer settings including toner save mode, custom paper size, sleep mode,
gray scale adjustment, resolution, water mark and many layout functions. You can easily
setup these print options through the Printer Setup Menu.
Printer Status Monitor with Bi-directional Parallel Interface
The printer driver can monitor the status of your printer using bi-directional parallel
communications. IEEE-1284 bi-directional parallel printer cable is recommended.
The printer status monitor program can show the current status of your printer. When printing,
the animated dialog box appears on your computer screen to show the current printing
process. If an error occurs, a dialog box will appear to let you know what to correct. If you
have turned on the interactive Help (Windows
95/98 only) you can get visual guidance on
your PC screen on the actions in the event of certain printer errors.
Quick Print Setup
The Quick Print Setup is a convenient utility to allow you to make changes to frequently used
driver settings easily without having to open the printer properties selection box every time. It
is launched automatically when this printer driver is selected. You can change the settings by
clicking on the icon with the right mouse button.
Enhanced Memory Management
The printer provides its own data compression technology in its printer hardware and the
supplied printer driver software, which can automatically compress graphic data and font data
efficiently into the printers memory. You can avoid memory errors and print most full page 600
dpi graphic and text data, including large fonts, with the standard printer memory.
1-1
CHAPTER 1 GENERAL
USB Interface (for Windows
98 / 2000/XP, iMac and Power Macintosh)
The printer can be connected using the Universal Serial Bus (USB) interface to a PC or Mac
which has a USB interface. Drivers that allow you to use the USB port are provided on the
CD-ROM supplied with the printer.
Popular Printer Emulation Support
These printers support the following printer emulation modes;
HP LaserJet (PCL6), PostScript Level 3 language emulation (Brother BR-Script Level 3),
Epson FX-850 and IBM Proprinter XL.
When you use DOS application software or Windows version 3.0 or earlier, you can use any
of these emulations to operate the HL-1850/1870N printers. The printers also support autoemulation switching between HP, Brother BR-Script 3 and Epson or HP, BR-Script 3 and IBM.
If you want to set the printer emulation, you can do it using the Remote Printer Console
Program.
High Resolution Control & Advanced Photoscale Technology
High Resolution Control (HRC) technology provides clear and crisp printouts. Use this function
to get smooth text print quality.
Advanced Photoscale Technology (APT) enables the printer to print graphics in 256
grayscales, producing nearly photographic quality. Use this function when you want to print
photographic images.
Environment-Friendly
<Economy Printing Mode>
This feature will cut your printing cost by saving toner. It is useful for obtaining draft copies for
proof-reading. You can select the 50% toner saving economy mode through the Windows
printer driver supplied with your printer.
<Sleep Mode (Power Save Mode)>
Sleep mode automatically reduces power consumption when the printer is not in use for a
certain period of time. The printer consumes less than 12W when in sleep mode.
<Low Running Cost>
Since the toner cartridge is separate from the drum unit, you need to replace only the toner
cartridge after printing around 6,500 pages at 5% coverage for A4 paper for the standard
cartridge, which is both cost effective and ecologically friendly.
Bar Code Print
The printer can print the following 11 types of bar codes;
Code 39
•
Code 128
•
Interleaved 2 of 5
•
Codabar
•
US-PostNet
•
ISBN
•
UPC-A
•
UPC-E
•
EAN-8
•
EAN-13
•
EAN-128
•
Network Feature (for HL-1870N only)
The Brother printer has built in multi protocol network capability as standard. This allows
multiple host computers to share the printer on a 10/100Mbit Ethernet network. Any users can
print their jobs as if the printer was directly connected to their computer. Users on Windows
®
95/98/Me, Windows® NT, Windows® 2000/XP, UNIX, Novell, Apple Macintosh, LAN server and
OS/2 Warp server computer simultaneously can access this printer. For further information,
see the Network Users Guide supplied with the printer.
1-2
2. OVERVIEW
<Front View>
HL-1850/1870N SERVICE MANUAL
Extension flap
Front cover
Multi-purpose tray extension
<Rear View>
Face down output tray
Multi-purpose tray
Control panel
Cover release button
Paper cassette
Fig. 1-1
Parallel interface connector
Face up output tray
Face up tray extension
Paper adjustment lever
Interface cover
Duplex tray
USB connectorPCB access plate
Power switch
Fig. 1-2
AC power inlet
for duplex printing
1-3
CHAPTER 1 GENERAL
3. SPECIFICATIONS
3.1 Printing
Print method Electrophotography by semiconductor laser beam scanning
Laser Wavelength: 780 nm
Output: 5mW max
Resolution HQ1200 (for Windows
®
95/98/Me, WindowsNT® 4.0, Windows
2000/XP, and Mac OS)
600 dpi (for Windows
®
95/98/Me, WindowsNT® 4.0, Windows
2000/XP, DOS and Mac OS)
300 dpi (for Windows
®
95/98/Me, WindowsNT® 4.0, Windows
2000/XP, and Mac OS)
Print quality Normal printing mode
Economy printing mode (up to 25% and 50% toner saving)
Print speed Normal: Up to 18 pages/minute (A4)
UP to 19 pages/minute (Letter-size paper)
Duplex printing: Up to 8.5 pages/minute*
(when loading A4 or Letter-size paper from the standard paper
cassette.)
Warm-up Max. 20 seconds at 23°C (73.4°F)
First print Max. 12 seconds
(when loading A4 or Letter-size paper from the standard paper
cassette.)
Print media Toner cartridge
Life expectancy: 6,500 pages/cartridge
(when printing A4 or Letter-size paper at 5% print coverage)
®
®
®
Developer Drum unit
Life expectancy: 20,000 pages/drum unit
*NOTE:
Print speed varies depending on the paper size or media type. For details, refer to APPENDIX
16 PRINT SPEEDS WITH VARIOUS SETTINGS.
1-4
3.2 Functions
CPU Fujitsu MB86834 100MHz
HL-1850/1870N SERVICE MANUAL
Emulation Brother Printing Solution for Windows
Automatic emulation selection among HP LaserJet (PCL level 6),
Brother BR-Script Level 3, EPSON FX-850 or IBM Proprinter XL
Printer driver <PCL Driver>
Windows
95/98/Me, Windows NT 4.0, Windows® 2000/XP driver,
supporting Brother Native Compression mode
<PS Driver>
PPD file driver for Windows
95/98/Me, Windows NT 4.0, Windows®
2000/XP driver and Macintosh driver
<Others>
• iMac, Power Macintosh with USB printer driver
• Optional Macintosh driver available for System 6.0.7 or higher
Interface • Bi-directional parallel
• Universal Serial Bus (USB)
• 10/100 BaseTX Ethernet network interface (optional for HL-1850)
• Optional IrDA
Memory HL1850: 16 Mbytes
HL1870N: 32 Mbytes
Expandable up to 136 Mbytes for HL1850 and 144 Mbytes for
HL1870N by installing an industry standard DIMM*
Control Panel • Display LCD: 1 line, 16 digit, 3 color
LED: 1 LED
• Buttons 7 keys
Diagnostics Self-diagnostic program
*NOTE:
The DIMM must have the following specifications;
Type: 100 pin
Access time: 60 nsec - 80 nsec
Capacity: 16, 32, 64, 128 Mbyte
Height: 35.0 mm (1.38 inches) or less
Output: 32 bit or 36 bit (independent of parity)
1-5
CHAPTER 1 GENERAL
3.3 Electrical and Mechanical
Power source U.S.A. and Canada: AC 110 to 120V, 50 Hz/60 Hz
Power consumption Printing (average): 410 W or less
10 W or less (for HL-1870N)
Noise Printing: 50dB A or less
Temperature Operating: 10 to 32.5°C (50 to 90.5°F)
Humidity Operating: 20 to 80% (non condensing)
Dimensions 425 x 424 x 275 mm
(W x D x H) (16.7 x 16.7 x 10.8 inches)
Europe and Australia: AC 220 to 240V, 50 Hz/60 Hz
Standing by: 70 W or less
Sleep*: 9 W or less (for HL-1850)
Standing by: 30dB A or less
Non operating: 0 to 40°C (38 to 104°F)
Storage: -20 to 40°C (-4 to 104°F)
Storage: 10 to 85% (non condensing)
A4 lower paper cassette installed: 425 x 424 x 384 mm
(16.7 x 16.7 x 15.1 inches)
Weight Approx. 14.5 kg (32.2 lb.) including the drum unit.
Approx. 18.7 kg (41.6 lb.) including the drum unit and the optional
lower tray unit.
*NOTE:
• The power consumption figure quoted for sleep mode is when the fan has stopped.
1-6
3.4 Network
Type / Speed 10/100 Base TX Ethernet
Protocols TCP/IP (RARP, BOOTP, DHCP, NetBIOS, WINS, LPR/LPD, Port9100,
Management • Web Based Management (HTTPD)
Firmware update Flash ROM based for Network module
HL-1850/1870N SERVICE MANUAL
Automatic negotiation
POP3/SMTP, SMB, User definable port, IPP, FTP, TELNET, SNMP,
HTTP, TFTP), Netware IPX/SPX (Bindey and NDS), Appletalk,
DLC/LLC, NetBEUI, DEC LAT, Banyan VINES
• BRAdmin Professional (using TCP/IP protocol and IPX/SPX)
• SNMP, MIB II as well as Brother private MIB
• TELNET command console (NIC only)
• HP JetAdmin compatible
• BRCONFIG DOS Utility (NIC only, needs Netware network)
• Front Panel Configuration (if the printer has LCD panel)
• Can be upgraded using TFTP
• Can be upgraded using IPX/SPX
• Easy upgrade using Brother BRAdmin utility
Supplied software • BRAdmin Professional management utility (for Windows
Windows
• Port driver for Windows
2000/XP
LPR port driver (for Windows
NT 4.0/Windows
2000/XP)
95/98, WindowsNT 4.0/Windows
95/98 only)
NetBIOS port driver
SMTP port driver
95/98,
1-7
CHAPTER 1 GENERAL
3.5 Paper
3.5.1 Feedable paper
(1) Paper type
Paper type
Plain paper
60 g/m
2
to 105 g/m
(16 to 28 lbs.)
Recycled paper
Bond paper
Thick paper
105 g/m
2
to 161 g/m
(28 to 43 lbs.)
Transparency
Label
Envelope
Card
2
2
Upper
paper
tray
Multi-
purpose
tray
Optional
lower
tray
Duplex
printing
○○○○
○○○○
○
○
○
Up to 10
sheets
○
Only A4
or Letter
size
○
Only A4
or Letter
size
○
○
Select the paper
type from the
printer driver
Plain paper
Plain paper
Bond paper
Thick paper
or thicker paper
Transparencies
Plain paper
Envelopes
or Env.Tick
or Env.Thin
Thick paper
or thicker paper
(2) Paper size
Upper
paper tray
A4, Letter, Legal,
8.5x13 in., B5 (JIS),
B5 (ISO), Executive,
Paper size
A5, A6, B6
(3) Other paper specifications
<Paper cassette>
Basis weight 60 to 105 g/m
Multi-purpose
tray
Width:
70 to 216 mm
(2.75 to 8.5 in.)
Length:
116 to 356 mm
(4.57 to 14.0 in.)
Cut sheet
2
(16 to 28 lb.)
1-8
Optional lower
tray
A4, Letter,
Legal, B5 (JIS),
B5 (ISO),
Executive, A5
Duplex
printing
A4,
Letter,
Legal
HL-1850/1870N SERVICE MANUAL
Caliper 0.08 to 0.13 mm (0.003 to 0.005 in.)
Moisture content 4% to 6% by weight
<Multi-purpose tray>
Cut sheet Envelope
2
Basis weight 60 to 161 g/m
(16 to 43 lb.) 75 to 90 g/m2 (20 to 24 lb.)
single thickness
Caliper 0.08 to 0.2 mm (0.003 to 0.008 in.) 0.084 to 0.14 mm (0.003 to 0.005 in.)
single thickness
Moisture
4% to 6% by weight 4% to 6% by weight
content
(4) Recommended paper
Europe USA
Plain paper Xerox Premier 80 g/m
Xerox Business 80 g/m
IGEPA X-Press 80 g/m
2
2
2
Recycled paper Steinbis Recycling Copy 80 g/m
Xerox 4200DP 20 lb
Champion Paper One 20 lb
Hammermill Laser Paper 24 lb
2
Transparency 3M CG3300 3M CG 3300
Label Avery laser label L7163 Avery laser label #5160
CAUTION:
!
When you are choosing print media, be sure to follow the information given below to prevent
any paper jams, print quality problems or printer damage;
• It is recommended to use long-grained paper for the best print quality. If short-grained
paper is being used, it might be the cause of paper jams.
• Use neutral paper. Do not use acid paper to avoid any damage to the drum unit.
• Avoid using coated paper such as vinyl coated paper.
• Avoid using preprinted or highly textured paper.
• It is recommended to use labels or transparencies which are designed for use in laser
printers.
• Avoid feeding labels with the carrier sheet exposed, or the printer will be damaged.
• Before loading paper with holes such as organizer sheets, be sure to fan the stack well.
• Do not use organizer sheets that are stuck together. The glue that is used might caused
damaged to the printer.
• When printing on the back of pre-printed paper, if the paper is curled, be sure to straighten
the paper as much as possible.
• Different types of paper should not be loaded at the same time in the paper cassette to
avoid any paper jams or misfeeds.
1-9
CHAPTER 1 GENERAL
3.5.2 Paper cassette capacity
Paper
Capacity
3.5.3 Print delivery
(1) Face down output tray
capacity: Maximum 150 sheets (80 g/m
(2) Face up output tray
capacity: Maximum 50 sheets (80 g/m
NOTE:
Face-down: Delivery with the printed face of the paper downwards.
Face-up: Delivery with the printed face of the paper upwards.
Upper
paper tray
250 sheet
(80 g/m
2
or 20 lbs.)
face down only
face up only
Multi-purpose
tray
100 sheets
2
(80 g/m
or 20 lbs.)
Legal: 30
8.5x13 in.: 30
Label stock: 10
Optional lower tray
250 sheets
(80 g/m
2
)
2
)
2
or 20 lbs.)
(3) We recommend the following print methods (output tray) for each paper media type.
Paper output
Media type
Face down Face up
Plain paper
Thick paper
Recycled paper
Transparency
Label
Envelope
Card
○○
○
○
○
○
○
○
○
1-10
3.6 Printable Area
3.6.1 PCL5e/EPSON/IBM emulation
The figure below shows the printable area each emulation guarantees when printing on Portrait
and Landscape.
Portrait
ʝ
G
HL-1850/1870N SERVICE MANUAL
ʝ
F
Physical page
Printable area
Logical page
ʝ
ʝ
E
ʝ
G
E
ʝ
B
ʝ
D
ʝ
G
ʝ
B
ʝ
D
ʝ
F
Physical page length
Maximum logical page length
DIstance from edge of physical page to
edge of logical page
ʝ
F
ʝ
G
ʝ
C
ʝ
A
ʝ
ʝ
ʝ
ʝ
ʝ
ʝ
ʝ
1-11
CHAPTER 1 GENERAL
The table below shows the printable areas when printing on Portrait for each paper size.
Size A B C D E F G
Letter
Legal
Executive
A 4
A 5
A 6
B 5 (JIS)
B 5 (ISO)
B 6
COM10
MONARCH
C 5
DL
NOTE:
• The paper sizes indicated here should confirm to the nominal dimensions specified by JIS
except B5 (ISO).
• The dot size is based on 300 dpi resolution.
215.9 mm
8.5
(2,550 dots)
215.9 mm
8.5
(2,550 dots)
184.15 mm
7.25
(2,175 dots)
210.0 mm
8.27
(2,480 dots)
148.5 mm
5.85
(1,754 dots)
105.0 mm
4.13
(1,240 dots)
182.0 mm
7.1
(2,130 dots)
176.0 mm
6.93
(2,078 dots)
125.0 mm
4.92
(1,476 dots)
104.78 mm
4.125
(1,237 dots)
98.43 mm
3.875
(1,162 dots)
162.0 mm
6.38
(1,913 dots)
110.0 mm
4.33
(1,299 dots)
279.4 mm
11.0
(3,300 dots)
355.6 mm
14.0
(4,200 dots)
266.7 mm
10.5
(3,150 dots)
297.0 mm
11.69
(3,507 dots)
210.0 mm
8.27
(2,480 dots)
148.5 mm
5.85
(1,754 dots)
257.0 mm
10.11
(3,033 dots)
250.0 mm
9.84
(2,952 dots)
176.0 mm
6.93
(2,078 dots)
241.3 mm
9.5
(2,850 dots)
190.5 mm
7.5
(2,250 dots)
229.0 mm
9.01
(2,704 dots)
220.0 mm
8.66
(2,598 dots)
203.2 mm
8.0
(2,400 dots)
203.2 mm
8.0
(2,400 dots)
175.7 mm
6.92
(2,025 dots)
198.0 mm
7.79
(2,338 dots)
136.5 mm
5.37
(1,612 dots)
93.0 mm
3.66
(1,098 dots)
170.0 mm
6.69
(2,007 dots)
164.0 mm
6.46
(1,936 dots)
164.0 mm
4.44
(1,334 dots)
92.11 mm
3.63
(1,087 dots)
85.7 mm
3.37
(1,012 dots)
150.0 mm
5.9
(1,771 dots)
98.0 mm
3.86
(1,157 dots)
279.4 mm
11.0
(3,300 dots)
355.6 mm
14.0
(4,200 dots)
266.7 mm
10.5
(3,150 dots)
297.0 mm
11.69
(3,507 dots)
210.0 mm
8.27
(2,480 dots)
148.5 mm
5.85
(1,754 dots)
257.0 mm
10.11
(3,033 dots)
250.0 mm
9.84
(2,952 dots)
176.0 mm
6.93
(2.078 dots)
241.3 mm
9.5
(2,850 dots)
190.5 mm
7.5
(2,250 dots)
229.0 mm
9.01
(2,704 dots)
220.0 mm
8.66
(2,598 dots)
6.35 mm
0.25
(75 dots)
Ç
6.35 mm
0.25
(75 dots)
6.01 mm
0.24
(71 dots)
Ç
Ç
Ç
Ç
Ç
6.35 mm
0.25
(75 dots)
Ç
6.01 mm
0.24
(71 dots)
Ç
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
1-12
Landscape
HL-1850/1870N SERVICE MANUAL
ʝ
ʝ
G
F
Physical page
Printable area
ʝ
ʝ
E
ʝ
G
E
ʝ
ʝ
B
D
ʝ
G
Logical page
B Physical page le ngth
D Maximum logical page length
ʝ
ʝ
ʝ
ʝ
ʝ
F D ista nce from edge of physical
ʝ
G
ʝ
C
ʝ
A
ʝ
F
page to edge of logical page
ʝ
1-13
CHAPTER 1 GENERAL
The table below shows the printable areas when printing on Landscape for each paper size.
Size A B C D E F G
Letter
Legal
Executive
A 4
A 5
A 6
B 5 (JIS)
B 5 (ISO)
B 6
COM10
MONARCH
C 5
DL
NOTE:
• The paper sizes indicated here should confirm to the nominal dimensions specified by JIS
except B5 (ISO).
• The dot size is based on 300 dpi resolution.
279.4 mm
11.0
(3,300 dots)
355.6 mm
14.0
(4,200 dots)
266.7 mm
10.5
(3,150 dots)
297.0 mm
11.69
(3,507 dots)
210.0 mm
8.27
(2,480 dots)
148.5 mm
5.85
(1,754 dots)
257.0 mm
10.11
(3,033 dots)
250.0 mm
9.84
(2,952 dots)
176.0 mm
6.93
(2,078 dots)
241.3 mm
9.5
(2,850 dots)
190.5 mm
7.5
(2,250 dots)
229 mm
9.01
(2,704 dots)
220 mm
8.66
(2,598 dots)
215.9 mm
8.5
(2,550 dots)
215.9 mm
8.5
(2,550 dots)
184.15 mm
7.25
(2,175 dots)
210.0 mm
8.27
(2,480 dots)
148.5 mm
5.85
(1,754 dots)
105.0 mm
4.13
(1,240 dots)
182.0 mm
7.1
(2,130 dots)
176.0 mm
6.93
(2,078 dots)
125.0 mm
4.92
(1,476 dots)
104.78 mm
4.125
(1,237 dots)
98.43 mm
3.875
(1,162 dots)
162 mm
6.38
(1,913 dots)
110 mm
4.33
(1,299 dots)
269.3 mm
10.6
(3,180 dots)
345.5 mm
13.6
(4,080 dots)
256.6 mm
10.1
(3,030 dots)
287.0 mm
11.2
(3,389 dots)
200.0mm
7.87
(2,362 dots)
138.5 mm
5.45
(1,636 dots)
247.0 mm
9.72
(2,916 dots)
240.0 mm
9.44
(2,834 dots)
166.4 mm
6.55
(1,960 dots)
231.1 mm
9.1
(2,730 dots)
180.4 mm
7.1
(2,130 dots)
219.0 mm
8.62
(2,586 dots)
210.0 mm
8.26
(2,480 dots)
215.9 mm
8.5
(2,550 dots)
215.9 mm
8.5
(2,550 dots)
184.15 mm
7.25
(2,175 dots)
210.0 mm
8.27
(2,480 dots)
148.5 mm
5.85
(1,754 dots)
105.0 mm
4.13
(1,240 dots)
182.0 mm
7.1
(2,130 dots)
176.0 mm
6.93
(2,078 dots)
125.0 mm
4.92
(1,476 dots)
104.78 mm
4.125
(1,237 dots)
98.43 mm
3.875
(1,162 dots)
162 mm
6.38
(1,913 dots)
110 mm
4.33
(1,299 dots)
5.0 mm
0.2
(60 dots)
Ç
5.0 mm
0.2
(60 dots)
4.8 mm
0.19
(59 dots)
Ç
Ç
Ç
Ç
Ç
5.0 mm
0.2
(60 dots)
Ç
4.8 mm
0.19
(59 dots)
Ç
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
0 mm
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
4.2 mm
0.16
(50 dots)
3.6.2 PCL6/BR-Script3 emulation
You can not print within 4.2 mm (50dots in 300 dpi mode) on all four sides of the paper.
1-14
HL-1850/1870N SERVICE MANUAL
CHAPTER 2 INSTALLATION AND BASIC OPERATION
1. CONDITIONS REQUIRED FOR INSTALLATION
1.1 Power Supply
• The source voltage must stay within ±10% of the rated voltage shown on the rating plate.
• The power cord, including extensions, should not exceed 5 meters (16.5 feet).
• Do no share the same power circuit with other high-power appliances, particularly an air
conditioner, copier or shredder. If it is unavoidable that you must use the printer with these
appliances, it is recommended that you use an isolation transformer or a high-frequency
noise filter.
• Use a voltage regulator if the power source is not stable.
1.2 Environment
• The printer should be installed near a power outlet, which is easily accessible.
• The room temperature is maintained between 10°C and 32.5°C. The relative humidity is
maintained between 20% and 80%.
• The printer should be used in a well ventilated room.
• Place the printer on a flat, horizontal surface.
• Keep the printer clean. Do not place the printer in a dusty place.
• Do not place the printer where the ventilation hole of the printer is blocked. Keep
approximately 100 mm (4 inches) between the ventilation hole and the wall.
• Do not place the printer where it is exposed to direct sunlight. Use a blind or a heavy
curtain to protect the printer from direct sunlight when the printer is unavoidably set up near
a window.
• Do not place the printer near devices that contain magnets or generate magnetic fields.
• Do not subject the printer to strong physical shocks or vibrations.
• Do not expose the printer to open flames or salty or corrosive gasses.
• Do not place objects on top of the printer.
• Do not place the printer near an air conditioner.
• Keep the printer horizontal when carrying.
• Do not cover the slots in the side cover.
1.3 System Requirements for Brother Printer Solution for Windows
Check the following system requirements to setup and operate the printer using Brother
Printing Solution for Windows
Operating system Computer / Processor Memory
Windows
95
Windows 98
Windows Me
Windows NT 4.0
Windows 2000/XP
:
486DX / 66MHz or higher processor 24MB
Pentium 150MHz or higher processor 32MB
Pentium 150MHz or higher processor 32MB
Pentium 150MHz or higher processor 24MB
Pentium 133MHz or higher processor 64MB
2-1
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