Brother Fax 4100 4750e 5750e Owners Guide

TROUBLESHOOTING AND ROUTINE MAINTENANCE   13 - 5
Paper is Jammed in the Paper Cassette
1Pull the paper cassette out of the 
machine.
2Remove any crinkled sheets.
3Adjust the guides to fit.
4Press down the paper to flatten it in the paper cassette.
5Reinstall the paper cassette.
Paper is Jammed near the Drum Unit
1Open the front cover.
2Remove the drum unit but do not force it if it cannot be removed easily. 
Instead, pull the edge of the jammed paper from the paper cassette.
3Gently pull out the jammed...

13 - 6   TROUBLESHOOTING AND ROUTINE MAINTENANCE
If You Are Having Difficulty with Your Machine
If you think there is a problem with your machine, make a copy first. If the copy 
looks good, the problem is probably not your machine. Check the table below 
and follow the troubleshooting tips.
DIFFICULTYSUGGESTIONS
Printing and Receiving Faxes
Condensed print and 
horizontal streaks; top 
and bottom of sentences 
are cut off.If your copy looks good, you probably had a bad 
connection, with static or...

TROUBLESHOOTING AND ROUTINE MAINTENANCE   13 - 7
DIFFICULTYSUGGESTIONS
Phone Line or Connections
Dialing does not work. Check for a dial tone. Change TONE/PULSE 
setting (See 
Setting Tone/Pulse Dialing Mode, Page 
4-8). Check all line cord connections, and make 
sure the curled handset cord is not in the EXT jack. 
Check power cord connection. Send a manual fax 
by pressing Hook—OR—by lifting the handset, 
and dialing the number. Wait to hear the fax 
receiving tones before pressing Fax Start.
The...

13 - 8   TROUBLESHOOTING AND ROUTINE MAINTENANCE
DIFFICULTYSUGGESTIONS
Handling Incoming Calls
Double-ring in 
FAX/TEL mode.
The machine knows the incoming call is not a fax, so 
it is signaling you to answer the telephone call. Pick 
up the 
machine handset or answer from an extension 
phone and then press your 
machine’s Telephone 
Answer Code (default setting is #51).
I have difficulty 
transferring a fax call to 
the machine.If you answered at the machine, press Fax Start 
and hang up immediately. If...

TROUBLESHOOTING AND ROUTINE MAINTENANCE   13 - 9
DIFFICULTYSUGGESTIONS
General Printing Difficulties
The machine does not 
print.Check the following: 
 • The machine is plugged in. 
 • The toner cartridge and drum unit are installed 
properly. 
 • The interface cable is securely connected 
between the machine and the computer.
 • Check to see if LCD is showing an error message. 
(See pages 13-1 to 13-3)
The machine prints 
unexpectedly or it prints 
garbage.Reset the machine. Check the primary settings...

13 - 10   TROUBLESHOOTING AND ROUTINE MAINTENANCE
DIFFICULTYSUGGESTIONS
Software Difficulties
“Unable to write to 
LPT1” or “LPT1 
already in use” error 
message appears.1. Make sure the machine is on (plugged into the 
AC outlet) and that it is connected directly to the 
computer using an 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 machine’s LCD screen is not 
displaying...

TROUBLESHOOTING AND ROUTINE MAINTENANCE   13 - 11
DIFFICULTYSUGGESTIONS
Paper Handling Difficulties
The Brother machine 
does not load paper. The 
LCD shows CHECK 
PAPER or PAPER 
JAM.Check to see if the CHECK PAPER or PAPER 
JAM message appears on the LCD. If so, the multi-
purpose sheet feeder 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 
paper cassette, make sure it is straight. If the paper 
is curled, you should...

13 - 12   TROUBLESHOOTING AND ROUTINE MAINTENANCE
DIFFICULTYSUGGESTIONS
Copy Quality Difficulties
Vertical streaks appear 
in copies.Sometimes you may see vertical streaks on your 
copies. Either the scanner or the primary corona 
wire for printing is dirty. Clean them both.  
(See pages 13-18 to 13-20)
Print Quality Difficulties
Printouts are too dark or 
too light.Adjust the print conditions by setting the Print Density 
setting. It has been factory set to the middle position. 
(See 
Setting the Print...

TROUBLESHOOTING AND ROUTINE MAINTENANCE   13 - 13
DIFFICULTYSUGGESTIONS
Print Quality Difficulties (
CONTINUED)
Toner scatters and stains 
the printed page.
Scattering TonerAdjust the print conditions by setting the Print 
Density setting. Remove the drum unit and clean 
the machine’s interior. (See 
Routine Maintenance, 
page 13-18, 
Cleaning the Printer, page 13-18 and 
Cleaning the Drum Unit, page 13-19.) Make sure 
that you use paper that meets specifications. (See 
pages 2-6.) If you still have...

13 - 14   TROUBLESHOOTING AND ROUTINE MAINTENANCE
DIFFICULTYSUGGESTIONS
Print Quality Difficulties (
CONTINUED)
Printed pages are 
blurred at the center or 
at either edge.
Blurred Page
Certain environmental conditions such as humidity 
and high temperatures may cause this condition to 
occur.  Make sure the 
machine is placed on a flat, 
horizontal surface.  Remove the drum unit with the 
toner cartridge installed. Try rocking them from side 
to side.  You may clear a blurred page by wiping the 
scanner...