Question about Brother IntelliFAX 4100 Laser Fax

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Need to know how to use maintenance mode to change compatibility to basic

We have four 4100e's and one of them at a branch location is unable to receive faxes from 3-4 of our customers. Much troubleshooting and discussions with various techs has finally led us to the conclusion that we need to use Maintenance Mode to change the compatibility to basic, or somehow turn off ECM and set baud to 9600.

I'm having a difficult time getting the right folks at Brother to tell me just how to do this.
I can't find any "maintenance" manuals for the machine online either.
Please help.

Dan in WV

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Re: Need to know how to use maintenance mode to change compatibility to basic - Brother IntelliFAX 4100 Laser Fax Fax...

Thanks RJ!

Posted on Sep 24, 2008

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Re: Need to know how to use maintenance mode to change...

You can disable Overseas mode to and that will help with ECM mode. But to lower the baud rate to 9600, I am not sure. Sorry.

Posted on May 28, 2008

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1 Answer

Unable to receive fax on 4100e

Sorry, but you have to be more specific on what are you trying to achieve and what you have done so far.
Do you want the unit to automatically answer a call and receive the fax? If so, make sure that you have switched it to FAX mode (press the MODE button repeatedly until FAX is shown on the display). You can also set it to FAX/TEL mode, whereby the machine will answer the calls and signal (ring) if it is a voice call not a fax.
The default setting is for the machine to answer after 4 rings, refer to the manual if you want to change this value (you can download the manual here:

If you want to manually receive a fax after you've picked the phone up yourself, then when you hear the other side fax beeping, simply press the START button.

Jul 21, 2011 | Brother IntelliFax-4100e Fax

1 Answer

Need to the baud rate how do you do it

Enter Maintenance Mode:

1. Unplug power from rear of Fax machine, hold the Menu button while plugging power back in. Continue to hold the Menu button until "Maintenance" appears in the LCD window.
2. There are no helps for the Maintenance mode. Follow parameter change procedures to the letter.

Changing Baud Rate from Automatic to 9600:

1. Enter 10 (one, zero). This will bring up WSW00 on the LCD window.
2. Change the 00 to 19. If the baud rate is set to automatic, the numbers that appear will be 11100010.
3. Change the 11100010 to 01100010. This sets the baud rate to 9600.
4. Press the "Set" button just below the LCD window.
5. Press "Stop".
6. Enter 99. This will exit Maintenance mode and make the fax ready to use again.

Feb 15, 2011 | Brother IntelliFax-4100e Fax

1 Answer

Hi, My office fax machine will not send or receive faxes, or make copies. I recently replaced the toner cartridge, and then the problems began. It keeps saying either printing online, or sending online,...

Sounds like a glitch in the memory has left a document there, unable to print. You'll need to clear it out by going into the Maintenance Mode. Maintenance Mode is not mentioned in your user's manual, because there are several functions available that can seriously disable the machine. All you have to do to be safe is follow these instructions to get into the mode, clear the memory, then get out without messing around with other functions.
Press these keys in rapid succession:

* (the star on the dialing keypad)

Do that whole sequence in 2 seconds or less, ignoring all the beeping the machine will assault you with. It's designed to not allow some to accidentally enter Maintenance Mode; if you wait for the beeping to stop, you'll fail, left in some part of the normal menus. When you succeed, the word MAINTENANCE will appear on the display, and all the lights will flash in unison. If that doesn't happen, just touch the STOP button and try again.

Once in maintenance Mode, touch 91 on the number pad. The display will say Initializing or something like that as it clears all the documents form the memory. Your programmed phone numbers and settings will not be affected. When it finishes it will go back to MAINTENANCE. Unplug the power for a few seconds, then plug it back in. The machine should be fine and ready to use.

If Function 91 doesn't work, you should try going back into MAINTENANCE and touch 01 instead. It will clear all memory back to the point it was when you first unboxed the machine. But I think 91 will take care of everything.

Feb 15, 2011 | Brother IntelliFax-4100e Fax

1 Answer

Need maintenace codes for brother 4100e fax

Power off the printer for 15 minutes and power back on again. If that fixes the problem then OK.
If not then go into maintenance mode -
Press and hold the menu/set key while turning on the machine. Wait until it comes completely up before releasing. It should say Maintenance in the display.

If not press function,*,2,8,6,4 within two seconds. It should say maintenance in the display. Or on some machines Menu,*,2,8,6,4 within 2 seconds.

Once you get it into maintenance hit 91 to do a parameter reset and than 99 to get out of maintenance.

You reset all Brother fax machines the same way. Press function, *, 2,8,6,4 all within 2 seconds to place the machine into the maintanence mode. Press 0,1 to perform a parameter reset. this will restore the machine to factory default settings. press 9,9 to exit maint mode.

Procedure is:

1) Unplug machine.
2) Hold down menu key. Plug in machine.
3) Release menu key.
4) Enter 91
5) Enter 99
6) Machine will warm up.
7) Press Reports key, then 1. This will test if the machine can
Above link is for the user & setup manuals. The codes are in there.

Apr 05, 2010 | Brother IntelliFax-4100e Fax

1 Answer

We have a Brother Intellifax 4100e, business class laserfax, superg3 fax machine in our office. When the fax machine goes into sleep mode, we can't get it to come out of sleep mode unless we unplug it and...

Try changing the sleep mode settings. Sometimes it's set too long or too short. You can try the perimeter reset as well. The instructions I have for that is as follows:

hit the menu button and numbers *2864 (star before the four numbers)
then hit 91(set) wait a few seconds for the maintenance screen to return
then hit 99(set) when it beeps saying completed that could fix your problem.

Hope this helps.

Jan 29, 2010 | Brother IntelliFax-4100e Fax

1 Answer

I can send but cannot recievefax. Fax is on SLEEP all the time.

The machine is set with the sleep mode as a default. The fax part can be changed to recieve a fax by pressing the fax mode button. Press it until it says Fax only, not F/T. F/T means Fax/Telephone. This mode would make it to where you have to pick up the reciever and press start when a fax comes in. The Fax only mode means it will pick up everytime a fax comes in automatically. Let me know if this was helpful. Please give my helping a rating. Thanks!

Feb 11, 2009 | Brother IntelliFax-4100e Fax

1 Answer

4100e brother fax i am unable to receive fax

if you are getting dial tone, then go tto the receive set up and scroll down to easy receive and then press set

Dec 30, 2008 | Brother IntelliFax-4100e Fax

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