Brother MFC 640CW - Color Inkjet - All-in-One Bedienungsanleitung

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FACSIMILE EQUIPMENT

SERVICE MANUAL

MODELS: MFC820CW

MFC640CW

DCP340CW

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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.

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Preface

This Service Manual is intended for use by service personnel and details the specifications,

construction, theory of operation, and maintenance for the Brother machines noted on the front cover.

It includes information required for troubleshooting and service--disassembly, reassembly, and

lubrication--so that service personnel will be able to understand equipment function, repair the

equipment in a timely manner and order spare parts as necessary.

To perform appropriate maintenance so that the machine is always in the best possible condition for

the customer, service personnel must adequately understand and apply this manual.

How this manual is organized

This manual is made up of nine chapters and appendices.

CHAPTER 1 PARTS NAMES AND FUNCTIONS

Contains external views and names of components and describes their functions. Information about

the keys on the control panel is included to help you check operation or make adjustments.

CHAPTER 2 SPECIFICATIONS

Lists the specifications of each model, which enables you to make a comparison of different models.

CHAPTER 3 THEORY OF OPERATION

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

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

defects for troubleshooting.

CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR

Describes how to transfer data left in the machine to be sent for repair. The service personnel

should instruct end users to follow the transfer procedure given in this chapter if the machine at the

user site cannot print received data due to the printing mechanism defective. End users can transfer

received data to another machine to prevent data loss.

CHAPTER 5 DISASSEMBLY/REASSEMBLY AND LUBRICATION

Details procedures for disassembling and reassembling the machine together with related notes. The

disassembly order flow provided enables you to see at a glance the quickest way to get to

component(s) involved.

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

shortcut to the object components.

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

lubricants should be applied during reassembly jobs.

CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS

REPLACEMENT

Details adjustments and updating of settings, which are required if the head/carriage unit, main PCB

and some other parts have been replaced.

CHAPTER 7 CLEANING

Provides cleaning procedures not covered by the User's Manual. Before starting any repair work,

clean the machine as it may solve the problem concerned.

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CHAPTER 8 MAINTENANCE MODE

Describes the maintenance mode which is exclusively designed for the purpose of checks, settings

and adjustments using the keys on the control panel.

In the maintenance mode, you can update memory (EEPROM: electrically erasable programmable

read-only memory) contents for optimizing the drive conditions of the head/carriage unit, paper feed

roller or paper ejection roller (if they have been replaced) or for setting the CIS scanner area, for

example. You can also customize the EEPROM according to the shipment destination of the

machine concerned. In addition, you can perform operational checks of the LCD, control panel PCB

or sensors, perform a print test, display the log information or error codes, and modify firmware

switches (WSW).

CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING

Details error messages and codes that the incorporated self-diagnostic functions display if any error

or malfunction occurs. If any error message appears, refer to this chapter to find which components

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. This will help service personnel pinpoint and

repair defective components.

Appendix 1 Serial Numbering System

Shows the location of serial number labels put on some parts and lists the coding information

pertaining to the serial numbers.

Appendix 2 Firmware Installation

Provides instructions on how to update firmware stored in the flash ROM on the main PCB or load

firmware to a new main PCB from the host PC.

No hardware replacement is required for updating.

Appendix 3 Customizing Codes According to Shipping Destination

Provides instructions on how to set up the customizing codes for the various preferences

exclusively designed for each destination (e.g. language). Those codes are stored in the memory

(EEPROM) mounted on the main PCB. If the main PCB is replaced, therefore, you need to set up

the proper customizing code with the machine in the maintenance mode.

Customizing codes customize firmware for individual models, enabling the common firmware to be

used for various models. They come with the firmware data provided by Brother Industries.

Appendix 4 Firmware Switches (WSW)

Describes the functions of the firmware switches, which can be divided into two groups: one is for

customizing preferences designed for the shipping destination (as described in Appendix 3) and the

other is for modifying preferences that match the machine to the environmental conditions. Use the

latter group if the machine malfunctions due to mismatching.

Appendix 5 Wiring Diagrams

Provides the wiring diagrams that help you understand the connections between PCBs.

Appendix 6 Circuit Diagrams

Provides the circuit diagrams of the MJ PCB and power supply PCB.

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Appendix 7 Viewing the Event Log File

When installing the printer driver, the installer logs events that occur during the installation process

in the event log file. This appendix views a sample of the event log file. Selecting Start | Program |

Brother | MFL-Pro Suite model name | Installation Diagnostics reads out the event log file.

This manual describes the models and their versions destined for major countries. The specifications and

functions are subject to change depending upon each destination.

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SAFETY PRECAUTIONS

To use the machine safely

Please refer to these instructions for later reference and before attempting any maintenance.

WARNING

There are high voltage electrodes inside the

machine. Before you clean the machine,

make sure you have unplugged the

telephone line cord first and then the power

cord from the AC power outlet.

Do not handle the plug with wet hands. Doing

this might cause anelectrical shock.

To prevent injuries, be careful not to put your

hands on the edge of the machine under the

scanner cover.

To prevent injuries, be careful not to touch

the area shaded in the illustration.

Whenmoving the machine you must lift it

from the base, by placing a hand at each side

of the unit as shown in the illustration. Do

NOT carry the machine by holding the

scanner cover.

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WARNING

Use caution when installing or modifying telephone lines. Never touch telephone wires or terminals that are

not insulated unless the telephone line has been disconnected at the wall jack. Never install telephone

wiring during a lightning storm. Never install a telephone wall jack in a wet location.

This product must be installed near anAC power outlet that is easily accessible. In case ofemergencies, you

must disconnect the power cord from the AC power outlet in order to shut off power completely.

To reduce the risk of shock or fire, use only a No. 26 AWG or larger telecommunication line cord.

Caution

Lightning and power surges can damage this product! We recommend that you use a quality surge

protection device on the AC power line and on the telephone line, or unplug the cords during a lightning

storm.

When lifting up the machine, hold it from the base. Holding the scanning cover (scanner unit) leaves the

machine body inclined, disengaging the scanner cover from the machine body or letting the machine body

fall.

IMPORTANT SAFETY INSTRUCTIONS

When using your telephone equipment, basic safety precautions should always be followed to

reduce the risk of fire, electric shock and injury to persons, including the following:

1. Do not use this product near water, for example, near a bathtub, washbowl, kitchen sink or

washing machine, in a wet basement or near a swimming pool.

2. Avoid using this product during an electrical storm. There may be a remote risk of electric shock

from lightning.

3. Do not use this product to report a gas leak in the vicinity of the leak.

4. Use only the power cord provided with the MFC.

SAVE THESE INSTRUCTIONS

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Choosing a location

Place your MFC on a flat, stable surface that is free of vibration and shocks, such as a desk. Put the MFC near

a telephone wall jack and a standard, grounded AC power outlet. Choose a location where the temperature

remains between 50°F and 95°F (10°C and 35°C).

Caution

Avoid placing your MFC in a high-traffic area.

Avoid placing your MFC on the carpet.

Do not place near heaters, air conditioners, water, chemicals, or refrigerators.

Do not expose the MFC to direct sunlight, excessive heat, moisture, or dust.

Do not connect your MFC to electrical outlets controlled by wall switches or automatic timers.

Disruption of power can wipe out information in the MFC’s memory.

Do not connect your MFC to electrical outlets on the same circuit as large appliances or other equipment

that might disrupt the power supply.

Avoid interference sources, such as speakers or the base units of cordless phones.

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CHAPTER 1

PARTS NAMES & FUNCTIONS

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CHAPTER 1 PARTS NAMES & FUNCTIONS

This chapter contains external views and names of components and describes their functions.

Information about the keys on the control panel is included to help you check operation or make

adjustments.

CONTENTS

1.1 OUTLINE ................................................................................................................1-1

1.2 CONTROL PANEL...................................................................................................1-3

1.3 COMPONENTS.......................................................................................................1-9

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