Brother Ppf 3750 Plain Paper Laser Fax Owners Manual

							109TROUBLESHOOTING AND MAINTENANCE
Regular Maintenance
You can keep your fax machine in optimum condition by cleaning it on a
regular basis. It is a good idea to clean the drum unit during this routine.
Avoid using thinners or other organic solvents to clean the fax machine and
do not use water.
Cleaning the Document Scanner
1Unplug the telephone line and then the power cord.
When you reconnect these lines later, make sure to connect the power cord
first, then the telephone line.
2Open the Control Panel cover.
3Wipe dirt off the fax machine using a slightly damp clean cloth.
4Clean the white bar and the glass cover.
Moisten a small piece of clean soft, lint-free cloth with isopropyl alcohol and
carefully remove dirt from the glass cover and the white bar of the
scanner.
 
Control Panel
Open the Control
Panel Cover
White Bar
Glass Cover 
						

							110CHAPTER THIRTEEN
Cleaning the Printer
WARNING
nDo not use isopropyl alcohol to remove dirt from the control panel.  It
may cause a crack on the panel.
nDo not use isopropyl alcohol to clean the scanner window or the toner
sensor.
nDo not touch the scanner window with your finger.
nHandle the drum unit carefully as it contains toner.  If toner scatters and
your hands or clothes get dirty, immediately wipe or wash it off with
cold water.
1Open the top cover.
2Remove the drum unit assembly.
Gears
Toner Sensor
Electrical
Terminal
Scanner Window Sensor  Strip
WARNING
Just after you have used the fax machine, some internal parts of the machine
are extremely HOT!  When you open the top cover of the fax machine,
never touch the shaded parts as shown in the diagram below.
HOT !
Inside the Fax Machine 
						

							111TROUBLESHOOTING AND MAINTENANCE
3Wipe the electric terminals with isopropyl alcohol on a cotton swab.
4Wipe the gears with a clean dry cloth.
5Gently wipe the scanner window and the toner sensor with a clean soft
dry cloth.  Do NOT use isoproply alcohol to clean the scanner window
or the toner sensor.
Cleaning the Drum Unit
We recommend you place the drum unit on a drop cloth or large piece of
disposable paper to avoid spilling and scattering toner.
1Carefully turn the drum unit upside down.
2Clean the primary corona wire inside the drum unit by gently sliding
the tab from right to left several times.
3Return the tab to the home position (t mark position) before
reinstalling the drum unit.
            
Ta b
Corona
Wire Home
Position
(
t)
CAUTION
If you do not position the tab at the home position, printed pages may have
vertical stripes.
4Install the drum unit into the fax machine.
See ÒReplacing the Drum UnitÓ on pages 117Ð121.
5Close the top cover.
6Plug in the power cord. 
						

							112CHAPTER THIRTEEN
Replacing the Toner Cartridge
The fax machine can print approximately 2,200 pages with one toner
cartridge.  When the toner cartridge is running low, the display shows
TONER LOW.  The fax machine is supplied with a starter toner cartridge
that must be replaced after 1,000 pages.  Actual page count will vary
depending on your average document type (i.e. standard letter, detailed
graphics).
It is a good idea to keep a new toner cartridge ready for use when you see
the TONER LOW warning.
Discard the used toner cartridge according to local regulations.  If you are
not sure of them, consult Brother Customer Service.  Be sure to seal the
toner cartridge tightly so toner powder does not spill out of the cartridge.
When discarding used toner cartridges, keep them separate from domestic
garbage.
It is recommended that you clean the fax machine when you replace the
toner cartridge.
Toner Empty Indicator
When the toner cartridge is running low, the display shows TONER LOW
and the Toner Empty LED on the control panel flashes on and off to indicate
the toner is low.
2750PLAIN PAPER LASER FACSIMILE
ResolutionModeTel-index
ABC DEF
Clear Function Set
Hook
Help/
Broadcast
HighFine
Photo TAD
S.FineFAX
FAX/TEL0203
04 01
Display Toner Empty LED
The Toner Empty LED light stays on and the display shows TONER EMPTY to
indicate that the toner is empty.  Once this indication appears, your fax machine
will not resume printing until you have installed a new toner cartridge. 
						

							113TROUBLESHOOTING AND MAINTENANCE
How to Replace the Toner Cartridge
WARNING
Just after you have used the fax machine, some internal parts of the fax
machine will be extremely HOT!  So, never touch the shaded parts shown in
the illustration.
      
HOT !
Inside the Fax Machine
1Open the top cover.  Make sure the top cover is completely open.  To
remove the drum unit, hold each side of the drum by its handles and
gently lift the drum forward toward you.
Drum Unit
Top Cover
Place the drum unit on a drop cloth or large piece of disposable paper to
avoid spilling and scattering the toner. 
						

							114CHAPTER THIRTEEN
2Gently turn the lever on the toner cartridge forward until it stops.  The
toner cartridge cannot be removed unless the shutter is completely
closed, by turning the lever fully to the front.
          
Drum
Unit
Toner
Cartridge
3Remove the old toner cartridge from the drum unit by gently pulling it
out.
WARNING
Handle the toner cartridge carefully.  If toner scatters on your hands or clothes,
immediately wipe it off or wash it with cold water.
    
						

							115TROUBLESHOOTING AND MAINTENANCE
4Unpack the new toner cartridge.  Place the used toner cartridge into the
aluminum bag and discard it according to local regulations.
Aluminum
Bag
New Toner
Cartridge
Old Toner
Cartridge
WARNING
nWait to unpack the toner cartridge until immediately before you install it into
the fax machine.  If a toner cartridge is left unpacked for a long period
of time, the toner life is shortened.
nYou can use only a genuine Brother toner cartridge (TN-5000PF
series), which is specially formulated to ensure top print quality.  Using
another brand of toner cartridge may void your fax machineÕs warranty.
5Gently rock the toner cartidge from side to side five or six times.
Toner
Cartridge 
						

							116CHAPTER THIRTEEN
6Slide the new toner cartridge into the opening on the right side of the
drum unit.  To ensure that the toner cartridge and the drum unit fit
together correctly, make sure that the toner cartridge guide arrow is
exactly aligned with the guide arrow on the drum unit.
Toner
Cartridge
Drum
Unit
7Gently turn the lever on the toner cartridge backward until it stops.
         
8Reinstall the drum unit into the fax machine and close the top cover.
Drum Unit
Top Cover 
						

							117TROUBLESHOOTING AND MAINTENANCE
Replacing the Drum Unit
The fax machine uses a drum unit to create the print images on paper.  If the
screen displays CHANGE DRUM SOON, the drum unit is nearly at the end
of its life.  Purchase a new drum unit to replace the current one.
Even if the display shows CHANGE DRUM SOON, you may be able to continue
to print without replacing the drum unit for a while.  However, if there is a
noticeable deterioration in the output print quality even before CHANGE DRUM
SOON is shown, then the drum unit should be replaced.  You should clean the fax
machine when you replace the drum unit.
WARNING
When removing the drum unit, handle carefully because it contains toner.
When you replace the drum unit, you should clean the fax machine.  (See
page 111.)
The drum unit is a consumable, and it is necessary to replace it periodically.
There are many factors that determine the actual drum life, such as temperature,
humidity, type of paper and toner that you use and the number of pages per
print job, etc.  The drum life is estimated at approximately 20,000 pages at
20 pages per job and 8,000 pages at 1 page per job.  The actual number of
pages your drum will print may be significantly less than these estimates.
Because we have no control over the many factors that determine the actual
drum life, we cannot guarantee a minimum number of pages that will be
printed by your drum.
For best performance, use only genuine Brother toner, and the product
should be used only in a clean, dust-free environment with adequate
ventilation. 
						

							118CHAPTER THIRTEEN
WARNING
Just after you have used the fax machine, some internal parts of the machine
are extremely HOT! So please be careful.
HOT !
Inside the Fax Machine
Follow these steps to replace the drum unit:
1Open the top cover.
2Remove the old drum unit.  Place the drum unit on a drop cloth or large
piece of disposable paper to avoid spilling and scattering the toner.
          
Top Cover
Drum Unit