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Brother 7820n

How can I get in to service mode?

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User maintenance mode is -

, Start, Menu/Set , and keys in this order

The function you can change are -

06 Placement of CIS Unit Position for Transportation
09 Test Pattern 1
10 Firmware Switch Setting
11 Printout of Firmware Switch Data
12 Operational Check of LCD
53 Received Data Transfer Function
54 Fine Adjustment of Scan Start/End Positions
80 Display of the Equipment's Log Information
82 Machine Error Code Indication
87 Output of Transmission Log to the Telephone Line

99 is to exit.

Posted on Feb 05, 2008

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Posted on Jan 02, 2017

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Our Brother 7820N Fax Machine/Printer is recieving faxes, but it is not sending them. It will dial the number then just beeps a few times. After trying two or three times it prints out an error report...

That sounds ok for me.
It is common thing what fax 2920/2820 should do.
Have you ever send fax to that same number previous?
Its probably problem with destination fax machine.

Feb 07, 2011 | Brother Office Equipment & Supplies

1 Answer

Brother mfc-490cw memory full cannot fax

first get to maintenance mode
Function *2864 (do this quickly)
• 91 resets all but user info,
• 99 to exit service mode.

Dec 11, 2009 | Brother IntelliFAX 2800 Laser Fax

1 Answer

First 2" on one side sends black to person page is being faxed too

This is likely caused by a faulty scanner, can be confirmed by either an incoming fax or internal printout, if this is clean no black on the one side then it is the scanner. you can try a scanner set in service mode, you can get to it by pressing a key combination of " features, * , 2, 8, 6, 4 " all within two seconds, if done quickly all the lights will flash and you will be in service mode, then hit 55 for scanner set if it fails so sorry, press 99 to exit service mode.

Dec 03, 2009 | Brother IntelliFAX 4100 Laser Fax

2 Answers

Brother Inteifax 775 will not send fax

change the mode from TAD to F/T by pressing mode button on panel

May 19, 2009 | Brother IntelliFAX 775 Plain Paper Thermal...

1 Answer

Brother fax model 575 in Manual recieve Mode,won't change

Telephone Answering Device (TAD). This is the mode you use when you have answering machine active on your phone line.

Mar 27, 2009 | Brother FAX-575 Plain Paper Thermal

1 Answer


Your Brother machine#s Sleep Mode function reduces power consumption while the machine is idle. You can adjust how long your Brother machine is idle (between 00 and 99 minutes) before Sleep Mode is initiated. Please note that the default setting is 00 minutes, and the timer automatically resets itself after the Brother machine receives a fax,receives data from your PC, or makes a copy. To adjust your Brother machine#s Sleep Mode setting, please follow these steps:

1. Press MENU/SET, 1 (General Setup), 7 (Sleep Mode).

2. Use the dial pad to enter the amount of time the fax machine is idle before Sleep Mode is initiated (00 to 99 minutes).

3. Press the MENU/SET key to confirm your choice.

4. Press the STOP/EXIT key to exit the menu.

NOTE: If you frequently print, copy, or fax, set the idle time long
enough to insure that you will not always have to wait for the Brother machine to warm up.

Dec 02, 2008 | Brother IntelliFAX 2800 Laser Fax

1 Answer


Our problem is not solved. It was suggested the feeder needed cleaning or wasn't working. The feeder works as we make copies of documents. If one is scanning can you feed the document or can you only scan one page at a time by placing it on the window?

Feb 13, 2008 | Brother Office Equipment & Supplies

2 Answers

Printing Online

i had the same problem, got this solution from brother and it worked!

unplug the fax machine
press and hold the stop button
while still hold down the stop button, plug the machine in
continue to hold down the stop button for 5 seconds

Feb 05, 2008 | Brother IntelliFAX 4100 Laser Fax

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