form or by any means without perm ission in writing
from the publisher.
Specifications are subject to change without notice.
PREFACE
This publication is a Service Manual covering the specifications, construction, theory of operation,
and maintenance of the Brother facsimile equipment. It includes information required for field
troubleshooting and repair--disassembly, reassembly, and lubrication--so that service personnel
will be able to understand equipment function, to rapidly repair the equipment and order any
necessary spare parts.
To perform appropriate maintenance so that the facsimile equipment is always in best condition
for the customer, the service personnel must adequately understand and apply this manual.
This manual is made up of six chapters and appendices.
CHAPTER 1GENERAL DESCRIPTION
CHAPTER 2INSTALLATION
CHAPTER 3THEORY OF OPERATION
CHAPTER 4DISASSEMBLY/REASSEMBLY AND LUBRICATION
CHAPTER 5MAINTENANCE MODE
CHAPTER 6ERROR INDICATION AND TROUBLESHOOTING
This manual describes the models and their versions to be destined for major countries. The specifications
and functions are subject to change depending upon each destination.
Paper Capacity (sheets)100
Output Paper Capacity (sheets)50
Standard Print LanguageWindows GDI
EmulationNo
Resident FontsYes
Fonts Disk BasedYes
Paper Handling Size
Manual Feed SlotN/A
Other Paper TypeOHP, Envelopes
Sheet Weight (Paper Cassette)
(Manual Slot)
Printer Driver
COPY
Color/MonoColor/Mono
Speed (ppm)7/4 (Mono/Color)
Multi Copy (Stack)Yes (Color) or Via PC
Multi Copy (Sort)Yes (Color) or Via PC
Resolution (dpi)Max. 1200x1200 (color)
2.1INSTALLING THE UPDATE DATA TO THE FACSIMILE MACHINE.............................2-1
2.2SETTING ID CODES TO FACSIMILE MACHINES CONNECTED TO A SINGLE
PC VIA THE USB PORT..................................................................................................2-3
2.3SETTING HEAD PROPERTY TO THE FACSIMILE MACHINE .....................................2-4
2.1INSTALLING THE UPDATE DATA TO THE
FACSIMILE MACHINE
If the program version is updated or the main PCB is replaced, then install the update program
onto the flash ROM of the main PCB.
The program installation requires a PC/AT-compatible computer (which is capable of running MSDOS or its compatible OS).
Connecting the facsimile machine to your PC
(1) Make sure that your PC is turned off.
(2) Make sure that the machine’s power cord is unplugged from a wall socket or other power
source.
(3) Connect the parallel interface cable to the parallel port on the back of the machine and secure
it with the lock wires.
(4) Connect the other end of the interface cable to the printer port of your PC and secure it with
two screws.
(5) While pressing the 5 key on the machine’s control panel, plug the machine’s power cord into a
wall socket.
(6) Check to see that the following pattern displays on the LCD. If it does not display, go back to
step (2) above.
(7) Turn on your PC.
Parallel interface
cable
Lock wires
Host computer
2-1
Installing the update data onto the flash ROM of the facsimile machine
NOTE: The following is an installation procedure example on a PC that is running Windows 95/98.
(1) Copy the update data and transfer utility onto the desired directory of the hard disk.
e.g., C:\UPDATE
(2) Click the Start button, point to Programs, and then click MS-DOS Prompt to open an MS-DOS
window.
(3) Type the drive letter where the update data and transfer utility are located. In the above
example, type C:\ from the command line and press the ENTER key.
Then type CD UPDATE and press the ENTER key.
(4) Check that your PC is connected with the facsimile machine correctly.
(5) To start the transfer utility transmitting the update data to the flash ROM of the facsimile
machine, type the following:
ICEN filename /b
Then press the ENTER key.
During downloading, the machine beeps intermittently.
Upon completion of the downloading, the machine beeps continuously.
NOTE: If the facsimile machine cannot return to the standby state af ter completion of downloading,
turn the power off and on.
2-2
2.2SETTING ID CODES TO FACSIMILE
MACHINES CONNECTED TO A SINGLE PC
VIA THE USB PORT
Function
Brother facsimile machines are assigned unique ID codes (character strings) at the factory. If you
replace the main PCB of the machine, the machine will lose its assigned ID code so that it will not
be identified by the connected PC.
To connect those machines to a PC via USB, you need to assign ID codes (character strings) to
those individual machines according to the procedure given here. For models covered by this
manual, set serial numbers given to individual machines as ID codes.
Connecting each of facsimile machines to your PC
(1) Make sure that your PC is turned off.
(2) Make sure that the machine's power cord is unplugged from a wall socket or other power
source.
(3) Connect the interface cable to the parallel interface port on the back of the facsimile machine
and secure it with the lock wires.
(4) Connect the other end of the interface cable to the printer port of your PC and secure it with
the two screws.
(5) Plug the machine's power cord into a wall socket or other power source.
(6) Turn on your PC.
Operating Procedure
(1) On your PC, run the ID setup utility. Follow the instructions shown on the PC's screen and
enter the 9-digit serial number (e.g., G01012345) printed on the nameplate labeled to the back
of the facsimile machine as an ID code. Then press the Enter key.
The ID setting utility will transmit the ID code data from your PC to the facsimile machine
and then it will terminate.
The facsimile machine will automatically return to the standby mode.
(2) To check whether the entered character string (ID code) is correct, make the machine enter the
maintenance mode (refer to CHAPTER 5, Section 5.1) and then press the 1 key twice
(Subsection 5.3.5).
The facsimile machine will print out a Configuration List. At the right top of the list, "SER.#:
BROXXXXXXXXX" is printed.
(3) Check that the character string entered in step (2) is printed in "XXXXXXXXX."
If it is OK, press the 9 key twice to exit from the maintenance mode.
If something other than that is printed in XXXXXXXXX, check the connection between the
PC and facsimile machine and go back to step (1).
2-3
2.3SETTING HEAD PROPERTY TO THE
FACSIMILE MACHINE
Function
To keep the print quality, the controller optimizes the head drive strength, ink jet-out timing, and
other drive conditions according to the electromechanical properties unique to the individual print
head and ambient temperature. The head property information is stored in the EEPROM of the
main PCB.
If you replace the print head unit and/or main PCB of the machine, then you need to update the
head property according to the procedure given here.
Connecting the facsimile machine to your PC
(1) Make sure that your PC is turned off.
(2) Make sure that the machine's power cord is unplugged from a wall socket or other power
source.
(3) Connect the interface cable to the parallel interface port on the back of the facsimile machine
and secure it with the lock wires.
(4) Connect the other end of the interface cable to the printer port of your PC and secure it with
two screws.
(5) Plug the machine's power cord into a wall socket or other power source.
(6) Turn on your PC.
Operating Procedure
(1) On your PC, run the head property setup utility. Follow the instructions shown on the PC's
screen and enter upper 12 digits (e.g., 55557B657031) out of the 13-digit property code
(enclosed with asterisks, e.g., *55557B657031H*) which is printed on the bar code label
attached to the print head unit.
The utility will transmit the head property from your PC to the facsimile machine and then it
will terminate.
The facsimile machine will automatically return to the standby mode.
(2) To check whether the entered head property is correct, make the machine enter the
maintenance mode (refer to CHAPTER 5, Section 5.1) and then press the 7 key twice
(Subsection 5.3.15).
The facsimile machine will print out the Equipment's Log. On the line about 1/3 of full length
of the log sheet below from the top, the 12-digit code is printed.
(3) Check that the character string entered in step (2) is printed in "XXXXXXXXXXXX."
If it is OK, press the 9 key twice to exit from the maintenance mode.
If something other than that is printed in XXXXXXXXXXXX, check the connection between
the PC and facsimile machine and go back to step (1).
The facsimile machine is classified into the following mechanisms:
SCANNER MECHANISM- ADF mechanism
INK JET PRINTING MECHANISM- Paper pulling-in, registration, feeding, and ejecting
SENSORS AND ACTUATORS
- Document scanning mechanism
mechanisms
- Ink jet printing and head capping mechanisms
- Purging mechanism
- Carriage drive mechanism
3-2
SCANNER MECHANISM
3-3
Ink jet pri nting and head
capping mechanisms
Purge mechanism
Carriage drive mechanism
Paper pulling-in,
registration, feeding, and
ejecting mechanisms
INK JET
PRINTING
MECHANISM
3.2.1 Scanner Mechanism
This mechanism consists of the document guide base, ADF & document tray ASSY and scanner
unit.
The ADF (automatic document feeder) unit contains a separation roller ASSY, document feed
roller ASSY, document ejection roller, ADF motor, and document front and rear sensors.
The scanner unit consists of a scanner top cover, CCD unit, CCD drive mechanism, CCD HP
sensor, and scanner base.
For details about the sensors, refer to Subsection 3.2.3.
3-4
This scanner mechanism supports a dual scanning system.
(1) If you set documents on the document guide base with their faces up and start the scanning
operation, then the ADF motor rotates to pull in those documents into the ADF unit, starting
from the top sheet to the bottom, page by page. Each document curves downwards and turns to
the right with the document feed roller so as to advance above the CCD unit, and then it is fed
out to the document tray with the document ejection roller ASSY.
This way, documents move above the CCD unit being kept in a stationary position.
(2) If you open the ADF & document tray ASSY, put a sheet of document (or put a bound book
opened) on the glass of the scanner top cover, close the ADF & document tray ASSY, and
start the scanning operation, then the CCD drive mechanism will be driven.
The CCD motor built in the CCD unit rotates. As illustrated below, the CCD drive gear and
idle pulley carry the CCD drive belt on the underside of the CCD unit, so clockwise and
counterclockwise rotations of the CCD motor move the CCD unit to the right and left,
respectively.
In this scanning system, the CCD unit moves horizontally beneath a document being kept in
stationary position.
The CCD unit contains a charge coupled device (CCD) image sensor. The cold-cathode
fluorescent lamp illuminates a document and the reflected light of the scanned image data is
transmitted via the mirrors into the lens which reduces the scanned data so as to form the image on
the CCD.
3-5
3.2.2 Ink Jet Printing Mechanism
3.2.2.1Paper pulling-in, registration, feeding, and ejecting mechanisms
The paper pulling-in, registration, feeding, and ejecting mechanisms are driven by a single paper
feed motor located at the left side of the main chassis via the gear train. (See the illustration given
on the next page.)
First, the paper feed motor rotates clockwise (when viewed from the output gear). The rotation is
transmitted to the PF roller gear that rotates paper feed roller. At the right end of the paper feed
roller is the PF roller gear R which is always engaged with the ASF/purge idle gear. Engaged with
the ASF/purge idle gear, the ASF-purge switching gear 23 transmits the rotation via gear 25 and
the ASF gear train to the ASF roller unit. This way, the ASF roller will pull in paper.
When the ASF roller is pulling in paper, the paper feed roller rotates in the backward direction to
register the leading edge of the pulled-in paper.
Next, the paper feed motor rotates counterclockwise to rotate the paper feed roller in the forward
direction. The paper will advance through the paper path. During the paper feeding operation, no
rotation is transmitted to the ASF roller because of the planetary gear system built in the ASF
roller unit.
The above paper pulling-in and feeding operations take place when the carriage is in printing
operation. If the carriage reaches the purge position, the ASF-purge switching gear 23 will be
disengaged from the gear 25 and engaged with purge bevel gear A. For the purging mechanism,
refer to Subsection 3.2.2.3.
Paper pulling-in
mechanism
Registration &
paper feeding
mechanisms
ASF
ASF roller
unit
Paper pressure
holders
Paper chute
Registration
sensor actuator
Paper width sensor
actuator
Paper feed roller
Recording paper
(Carriage)
(Carriage rail)
(Ink cartridges)
Platen
(Print head unit)
Star wheels
Paper ejection
roller
Paper ejecting
mechanism
3-6
Gear 31MF
ASF roller unit
PF roller gear
Gear shaft 17
PF roller gear R
Gear 39
Paper feed
roller
Gear 25
ASF-purge
switching gear 23
ASF/purge idle gear
Paper feed motor
3-7
3.2.2.2Ink jet printing and capping mechanisms
Carriage encoder
Carriage
motor
Carriage rail
(1) Print head unit
Main chassis
Platen
Carriage PCB
Ink cartridge sensors
Ink cartridges
Ink empty sensor
Carriage
(Star wheels)
(Paper ejection roller)
Print head unit
This machine uses drop-on-demand ink jet printing. Each of the right and left print heads has an
ink-jet unit that has a pair of nozzle columns for two color inks. A nozzle column consists of 75
nozzles, 75 channels covered with piezoelectric ceramic (PZT), a manifold, and filter. As
illustrated below, the pair of nozzle columns is staggered.
Nozzle Layout (viewed from the bottom)
3-8
If the controller issues a print command, a biased voltage will be applied to all electrodes formed
on the surface of the piezoelectric ceramic so that each actuator will be distorted as shown with
broken lines.
If the electrodes on a target channel are deenergized according to drive signals, then the associated
piezoelectric ceramic actuator returns to the previous form so that the ink in the manifold will be
vacuumed out to the channel.
If the voltage is applied again, the piezoelectric ceramic actuator will be distorted again to apply
pressure to the ink in the channel, causing the ink to jet out through the nozzle. The jetted-out ink
drop will be splashed and produce a dot on paper held by the platen.
As the carriage holding the print head unit travels at the printing speed, the controller sends print
command pulses to the piezoelectric actuator driver circuit embedded in the print head unit.
(2) Ink cartridges
The machine uses four ink cartridges (black, cyan, yellow, and magenta) of disposable type to
supply ink to the print head unit. As shown below, an ink cartridge contains an ink-impregnated
urethane foam. If ink-jet print operation or purging operation takes place, ink comes out of the
urethane foam and is supplied to the print head unit through the ink room, filters, and manifold.
For the ink cartridge sensors on the carriage PCB, refer to Subsection 3.2.3.
3-9
(3) Head cap
Shown below is a head cap mechanism that prevents the nozzles of the print heads from drying up
when they are not in use.
Upon completion of printing, the carriage travels to the right and moves the head cap holder
provided on the purge unit to the right together. In the head cap holder is a head cap which is
supported with a lift lever. The rightward movement of the head cap holder turns the lift lever and
pushes up the head cap to the position where the head cap comes into tight contact with the print
heads. This way, the nozzles will be capped.
3-10
3.2.2.3Purging mechanism
The purge mechanism is driven by the paper feed motor located at the left side of the main chassis.
As described in Subsection 3.2.2.1, the motor rotation is transmitted to the ASF/purge idle gear at
the right side of the main chassis. Engaged with the ASF/purge idle gear, the ASF-purge switching
gear 23 works as a clutch gear.
When the carriage travels from the left to right to reach the purge position, the tab provided on the
back of the carriage pushes the purge lever on the main chassis to the right (see the illustration
below). Accordingly, the ASF-purge switching gear 23 (which was shifted to the left by the purge
lever) will move to the right by the switching gear spring so as to become disengaged from the
gear 25 and engaged with the purge bevel gear A. (See the illustration given on the next page.)
This engagement will transmit the motor rotation to the purge bevel gear B on the purge unit. This
way, when the carriage is in the purge position, the motor rotation is transmitted to the purge unit.
On the contrary, if the carriage travels from the purge position to the left, the tab on the back of the
carriage releases the purge lever which will be pulled back to the left. The ASF-purge switching
gear 23 will be disengaged from the purge bevel gear A.
3-11
During printing: The ASF-purge switching gear 23 is
not engaged with pur ge bevel gear A ( but engaged with
gear 25 in the ASF gear train).
During purging: T he ASF-purge
switching gear 23 is engaged with
purge bevel gear A.
When the motor rotation is transmitted to the purge unit, its counterclockwise rotation will drive
the purge cam and its clockwise rotation, the pump switching unit (when viewed from the output
gear of the motor).
When the paper feed motor rotates counterclockwise
When the paper feed motor rotates clockwise
3-12
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