Brother MFC-8500 User Manual Page 203

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TROUBLESHOOTING AND ROUTINE MAINTENANCE
22 - 10
Software
Difficulties
Unable to write to
LPT1 or LPT1 already
in use error message
appears.
1. Make sure the MFC is on (plugged into the AC outlet)
and that is connected directly to the computer using
the bundled IEEE-1284 bi-directional parallel cable.
The cable must not go through another peripheral
device (such as a Zip Drive, External CD-ROM
Drive, or Switch box).
2. Make sure the MFCs LCD screen is not displaying
an error message.
3. Make sure no other device drivers, which also
communicate through the parallel port, are running
automatically when you boot up the computer (such as,
drivers for Zip Drives, External CD-ROM Drive, etc)
Suggested areas to check: (Load=, Run= command lines
in the win.ini file or the Startup Group)
4. Check with you computer manufacturer to confirm
that the computers parallel port settings in the BIOS
are set to support a bi-directional machine, i.e.
(Parallel Port Mode-ECP).
MFC is Busy or MFC
Connect Failure error
message appears.
Paper
Handling
Difficulties
The machine does not load
paper. The LCD shows
CHECK DOCUMENT
or
PAPER JAM
.
Check to see if the CHECK DOCUMENT or
PAPER JAM message appears on the LCD. If so, the
multi-purpose paper cassette may be out of paper or not
properly installed. If it is empty, load a new stack of paper
into the feeder. If there is paper in the multi-purpose paper
cassette, make sure it is straight. If the paper is curled, you
should straighten it. Sometimes it is helpful to remove the
paper, turn the stack over and put it back into the multi-
purpose paper cassette. Reduce the amount of paper in the
multi-purpose paper cassette, then try again. Check the
manual feed mode is not selected in the printer driver.
The machine does not
feed paper from the
manual feed slot.
Reinsert the paper firmly, load one sheet at a time. Make
sure that manual feed mode is selected in the printer
driver.
How can I load
envelopes?
You can load envelopes from the manual feed slot. Your
application software must be set up to print the envelope
size you are using. This is usually done in the Page Setup
or Document Setup menu of your software. Refer to your
software application manual.
Paper
Handling
Difficulties
(Cont.)
What paper can I use? You can use plain paper, envelopes, transparencies and
labels that are made for laser machines. (For information
on paper you can use, see Acceptable Paper, on Page 2-
6.)
How can I clear paper
jams?
See Printer Jams, on Page 22-4.
Print
Quality
Difficulties
Printouts are too dark or
light.
Adjust the print conditions by setting the Print Density
function. It has been factory set to the middle position.
(See Setting the Print Density, on Page 5-4.)
Difficulty Suggestions
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