Brother Printers Mfc 7750 Laser 600x600dpi Super G3 Fax Owners Manual

207TROUBLESHOOTING AND MAINTENANCE
MFC Connect Failure or Bi-Directional
Communication Error
Recently,  some printers have included a function to show the printer status
on the PC display.  Such printers use the bi-directional communication
parallel port between the printer and the PC.  Our MFCs have a
bi-directional parallel port function. Since Windows
¨ 3.xx does not support
bi-directional communication on the parallel port, each peripheral vendor
has developed and supplied a bi-directional device...

208CHAPTER NINETEEN
HP LaserJet series II, IID, IIP, IIP+, III, IIID or IIIP:
If Microsoft Windows¨ Printing System is used for the above models, you
must  modify the Òwin.iniÓ file in the Windows
¨ directory to turn the
printers
bi-directional function off.
We recommend that you do a back-up before you modify the WIN.INI or
SYSTEM.INI files, just in case.
Open the Òwin.iniÓ file using the ÒNotepadÓ application. Look for the
following statement in the [spooler] section.
[spooler]
QP.LPT1 = wpsljqp.dll...

209TROUBLESHOOTING AND MAINTENANCE
EPSON ActionLaser 1100 / 1400:
Please remove the EPSON Action Laser 1100/1400 driver by running the
EPDELETE.EXE file in the Windows
¨ Printer Driver for these models.
Lexmark WinWriter  200:
You must modify the Òwin.iniÓ and Òsystem.iniÓ files in the Windows¨
directory to turn off the printers bi-directional function.
We recommend that you to backup the WIN.INI and SYSTEM.INI files
before you modify them.
Open the Òwin.iniÓ file using the ÒNotepadÓ application. Look...

210CHAPTER NINETEEN
Packing and Shipping the MFC
Whenever you transport the MFC, use the packing materials that came with
your MFC.  Also, follow the steps below to pack the MFC or it may be
damaged, which will void the MFCs warranty.
1Remove the telephone line cord and unplug the MFC from the AC
outlet.
2Open the top cover.
3Hold the drum unit assembly by its handles and remove it.
WARNING
Remove the drum unit and toner cartridge assembly.  Leave the toner
cartridge installed in the drum unit.
Top...

211TROUBLESHOOTING AND MAINTENANCE
4Place the drum unit and toner cartridge assembly into the plastic bag
and seal the bag completely.
       
Plastic Bag
Toner Cartridge Drum Unit
5Close the top cover.  Remove the wire extension, document tray, dust
cover, paper tray and handset and pack them.
6Wrap the MFC in the plastic bag and place it in the original carton box
with the original packing material. 

212CHAPTER NINETEEN
7Place documents (manual and printed material) and the drum unit and
toner cartridge assembly into the original carton as shown below:
              
(MFC 4350 only)
(MFC 4650, 
MFC 6650MC
and MFC 7750)
8Close the carton and tape it shut. 

213TROUBLESHOOTING AND MAINTENANCE
Regular Maintenance
You can keep your MFC 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 MFC 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.
3  Wipe...

214CHAPTER NINETEEN
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...

215TROUBLESHOOTING AND MAINTENANCE
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.
1Turn the drum unit upside down carefully.
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.
Home Position (t)
TabCorona Wire
CAUTION
If you do not position the tab at the...

216CHAPTER NINETEEN
Replacing the Toner Cartridge
The MFC can print approximately 2,200 pages with one toner cartridge.
When the toner cartridge is running low, the display shows TONER LOW.
The MFC 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...