Brother DCP-8080DN User manual

Confidential

Laser FAX/MFC

SERVICE MANUAL

Read this manual thoroughly before maintenance work.

Keep this manual in a convenient place for quick and easy reference at all times.

January 2009

SM-FAX105

MODEL:

DCP-8080DN/8085DN

MFC-8480DN/8880DN/8890DW

tial

PREFACE

This service manual contains basic information required for after-sales service of the Laser

Multi-Function Center (hereinafter referred to as "the machine"). This information is vital to the

service personnel to maintain the high printing quality and performance of the machine.

This service manual covers the DCP-8080DN/8085DN, MFC-8480DN/8880DN/8890DW

machines.

This manual consists of the following chapters:

CHAPTER 1: SPECIFICATIONS

Provides specifications of each model, which enables you to make a comparison of the

different models.

CHAPTER 2: THEORY OF OPERATION

Gives an overview of the printing mechanisms as well as the sensors, actuators, and control

electronics. It aids in understanding the basic principles of operations as well as locating

defects for troubleshooting.

CHAPTER 3: ERROR INDICATION AND TROUBLESHOOTING

Details of error messages and codes that the incorporated self-diagnostic function of the

machine will display if any error or malfunction occurs. If any error message appears, refer

to this chapter to find which parts should be checked or replaced.

The latter half of this chapter provides sample problems that could occur in the main sections

of the machine and related troubleshooting procedures.

CHAPTER 4: PERIODIC MAINTENANCE

Details of consumable parts and periodical maintenance parts. This chapter also covers

procedures for disassembling and assembling periodical maintenance parts.

CHAPTER 5: DISASSEMBLY/REASSEMBLY

Details of procedures for disassembling and assembling of the machine together with related

notes. The disassembly order flow provided enables you to see at a glance the quickest way

to get to parts involved.

At the start of a disassembly job, you can check the disassembly order flow that guides you

through a shortcut to get to the object parts.

This chapter also covers screw tightening torques and lubrication points to which the

specified lubrications should be applied during assembly jobs.

CHAPTER 6: ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED

AFTER PARTS REPLACEMENT

Details of adjustments and updating of settings, which are required if the main PCB and

some other parts have been replaced. This chapter also covers how to update the firmware.

CHAPTER 7: SERVICE MODE

Describes the maintenance mode which is exclusively designed for the purpose of checking

the settings and adjustments using the keys on the panel.

This chapter also covers hidden function menus, which activate settings and functions or

reset the parts life.

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APPENDIX 1: FIRMWARE SWITCHES (WSW)

APPENDIX 2: DELETION OF USER SETTING INFORMATION, etc.

Provides instructions on how to delete such as user setting information recorded in the

machine.

APPENDIX 3: SERIAL NUMBERING SYSTEM

APPENDIX 4: SCREW CATALOGUE

APPENDIX 5: REFERENCES

APPENDIX 6: GLOSSARY

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.

iii Confidential

REGULATION

For Europe and Other countries

■Radio interference (220 to 240 volt model only)

This machine follows EN55022 (CISPR Publication 22)/Class B.

Before you use this product, make sure that you use one of the following interface cables.

(1) A shielded parallel interface cable with twisted-pair conductors and that it is marked

IEEE 1284 compliant.

(2) A USB cable.

The cable must not be more than 2 meters long.

■IEC 60825-1 specification (220 to 240 volt model only)

This machine is a Class 1 laser product as defined in IEC 60825-1 specifications. The label

shown below is attached in countries where it is needed.

This machine has a Class 3B laser diode which produces invisible laser radiation in the laser

unit. You should not open the laser unit under any circumstances.

Caution

Use of controls or adjustments or performance of procedures other than those specified in

this User's Guide 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.

CLASS 1 LASER PRODUCT

APPAREIL À LASER DE CLASSE 1

LASER KLASSE 1 PRODUKT

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■Internal laser radiation

Maximum radiation power: 5 mW

Wave length: 770 - 810 nm

Laser class: Class 3B

■EU Directive 2002/96/EC and EN50419

(European Union only)

This equipment is marked with the above recycling symbol. It means that at the end of the

life of the equipment you must dispose of it separately at an appropriate collection point and

not place it in the normal domestic unsorted waste stream. This will benefit the environment

for all. (European Union only)

Confidential

For USA and Canada

■Federal Communications Commission (FCC) Declaration of Conformity

(For USA)

Responsible Party: Brother International Corporation

100 Somerset Corporate Boulevard

P.O. Box 6911

Bridgewater, NJ 08807-0911

USA

Telephone: (908) 704-1700

declares, that the products

Product name: Laser Printer DCP-8080DN/8085DN, MFC-8480DN/8880DN/

8890DW

complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and (2) this device must accept any

interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital

device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide

reasonable protection against harmful interference in a residential installation. This

equipment generates, uses, and can radiate radio frequency energy and, if not installed and

used in accordance with the instructions, may cause harmful interference to radio

communications. However, there is no guarantee that interference will not occur in a

particular installation. If this equipment does cause harmful interference to radio or television

reception, which can be determined by turning the equipment off and on, the user is

encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is

connected.

• Consult the dealer or an experienced radio/TV technician for help.

Important

A shielded interface cable should be used to ensure compliance with the limits for a Class B

digital device. Changes or modifications not expressly approved by Brother Industries, Ltd.

could void the user's authority to operate the equipment.

vi Confidential

■Industry Canada Compliance Statement (For Canada)

This Class B digital apparatus complies with Canadian ICES-003.

Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.

■Laser Safety (110 to 120 volt model only)

This machine is certified as a Class 1 laser product under the U.S. 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 machine does not produce

hazardous laser radiation.

Since radiation emitted inside the machine is completely confined within protective housings

and external covers, the laser beam cannot escape from the machine during any phase of

user operation.

■FDA Regulations (110 to 120 volt model only)

The U.S. 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. The following label on the back of the machine indicates

compliance with the FDA regulations and must be attached to laser products marketed in the

United States.

■Internal laser radiation

Maximum radiation power: 5 mW

Wave length: 770 - 810 nm

Laser class: Class 3B

MANUFACTURED:

Brother Technology (Shenzhen) Ltd.

NO6 Gold Garden Ind., Nanling Buji, Longgang, Shenzhen, China

This product complies with FDA performance standards for laser products except for

deviations pursuant to Laser Notice No.50, dated July 26, 2001.

Confidential

SAFETY INFORMATION

■Caution for Laser Product (WARNHINWEIS fur Laser drucker)

CAUTION: When the machine during servicing is operated with the cover open, the

regulations of VBG 93 and the performance instructions for VBG 93 are

valid.

CAUTION: In case of any trouble with the laser unit, replace the laser unit itself. To

prevent direct exposure to the laser beam, do not try to open the enclosure

of the laser unit.

ACHTUNG: Im Falle von Störungen der Lasereinheit muß diese ersetzt werden. Das

Gehäuse der Lasereinheit darf nicht geöffnet werden, da sonst

Laserstrahlen austreten können.

■ADDITIONAL INFORMATION 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.

Confidential

■Definitions of Warnings, Cautions and Notes

The following conventions are used in this service manual:

Mark Contents

Warnings tell you what to do to prevent possible personal injury.

Electrical Hazard icons alert you to a possible electrical shock.

Hot Surface icons warn you not to touch machine parts that are hot.

Cautions specify procedures you must follow or avoid to prevent

possible damage to the machine or other objects.

Note Note Notes tell you useful tips when servicing the machine.

Memo Memo Memo tells you bits of knowledge to help understand the

machine.

WARNING

Indicates warnings that must be observed to prevent possible personal injury.

CAUTION:

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

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 back cover to access any parts inside the printer,

never touch the shaded parts shown in the following figures.

ix Confidential

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.

WARNING

DO NOT use flammable substances, any type of spray or any organic solvent/liquids

contains alcohol or ammonia to clean the inside or outside of the machine.

Doing this may cause a fire or electrical shock.

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