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...

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...

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...

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...

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...

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...

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...

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