20 Most Recent Brother MFC-7420 Printer Questions & Answers

Unfortunately, the MFC-7420 doesn't have a physical lock switch. You need to turn off the all-in-one and wait for the unit to clear its memory. If the error recurs after you press the power button again, wait 30 minutes and try again. (Note: you will lose any faxes that are in memory. See the User Guide page 11-5 to save this information.) You can find the manual on the Brother support page for the MFC-7420: https://www.brother-usa.com/support/ModelInfo.aspx?R3ModelID=MFC7420 . Click on the Manuals & Documents tab. Then click on the Manuals on our Online Solution Center for the English version of the manual. The direct link to the User Guide is currently: http://download.brother.com/welcome/doc000387/ALLFB_UsaEngUsr_B.pdf . You can also try unplugging the all-in-one for several minutes to reset the error codes. If the error persists, contact Brother if the MFC-7420 is still under warranty (1 year). If it isn't under warranty, consider replacing the unit. The repair costs may be unreasonable. I hope this helps. Cindy Wells

Generally refers to an faulty electrical connection in the drum. Either replace the drum or take it apart and look for an electrical connector or conductive coupling that is damaged. The toner cartridge also has an electrically conductive connector on the Developer roller shaft (Black plastic), check it is not broken.

Its either your Toner or Drum

Fax uses analogue line signal, make sure you have a micro-filter/converter on your u-verse line for your fax

Enter maintenance mode - Press menu * 2864 9 within 2 sec.) press 91 to reset all settings to factory fault . then press 99 to exit .

Sometimes it's better to run the CD or downloaded program again to reset everything.

These machines need to have their drum units replaced every 12000 pages. If you have replaced it then it needs to have the machine reset. Normally the instructions are included in the box with the new drum unit but not many people read these.

1. Open the front cover (Where you put the cartridge and drum unit in)
2. Press the Back Button
3. Display reads "Replace Drum 1. Yes 2. No"
4. Press the number 1
5. The display reads "Accepted"
6. Close the Front Cover

If you have not replaced the drum unit and you reset the drum counter you will see a noticeable degradation of the printouts coming from the machine.

just go to the nearest service center, or contact the service center

buy a new one

download from
http://welcome.solutions.brother.com/BSC/public/us/us/en/model_top/monolasermfc/mfc7420_all.html?reg=us&c=us&lang=en&prod=mfc7420_all

Try this.. It worked in my Brother MFC 7320.. SO it May work.. Open the cover. Remove Drum and Cartridge. Look inside. There are 2 LENS ON both sides. Cover the lens with a tape. Replace Drum and Cartridge. Click cancel. then click 1 for replace drum.. close cover.. Let me know if it works

1. Start the BRAdmin Professional utility, by clicking Start => All Programs or Programs => Brother Administrator Utilities => Brother BRAdmin Professional Utilities => BRAdmin Professional.
2. From the main BRAdmin screen double click the appropriate printer.
3. Enter the print server password (The default password is "access").
4. Click the Control tab
5. Click the Restore Factory Defaults button
6. Click the OK button when you have read the warning message.
7. The print server will then reset back to its default values.

1. Start the BRAdmin Professional utility, by clicking Start => All Programs or Programs => Brother Administrator Utilities => Brother BRAdmin Professional 3 => BRAdmin Professional 3.
2. From the main BRAdmin screen double click the appropriate machine.
3. Enter the print server password (The default password is "access").
4. Click Network Configuration tab, Control Panel and select Set Default.
5. Click on Submit button.
6. The print server will then reset back to its default values.
   
   
   

Via a web browser
Because web based management requires the TCP/IP protocol for communication, any reset option you see when managing the machine with a web browser, will not reset the IP address details that are set. If you wish to totally reset all the print server parameters we recommend you reset the print server by using the BRAdmin application.

To reset the print server (excluding TCP/IP parameters) follow these steps:

1. Connect to the printer using a web browser.
2. Click Network Configuration.
3. Enter the print server password (the print server password is detailed in the user guide for the print server) if it's applicable.
4. Click the Set Default link or Reset Print Server.

Via the control panel (only for network ready models)

1. Make sure the machine is not operating, then disconnect all the cables from the machine (except power cable).
2. Press the Menu or Menu/Set key on the control panel.
3. Press up or down navigation key to select LAN or Network and press Set, Menu/Set or OK.
4. Press up or down navigation key to select Factory Reset or Network Reset and press Set, Menu/Set or OK.
5. Select Reset.
6. Select Yes.
7. The machine will re-start, re-connect cables once this is complete. please rate it
   

Simply open the front cover.

Press the Options key on the control panel.
The display will show "REPLACE DRUM - 1.YES 2.NO".

Press 1 to reset the drum count.

Close the front cover.

This procedure wil work on the majority of the Brother MFC series of laser based Printer Scanner Fax Facsimile machines.

Good Luck and Thank You for using Fixya WheatlandServices

Well , if you are on internet , check your signal should be Good at least ,
or if you are on network Group like on offices and companies , check your hub connection
and the most importand is to check the connection wire of the net

need to get the drivers and info
try here http://welcome.solutions.brother.com/BSC/public/us/ca/en/model_top/monolasermfc/mfc7420_all.html?reg=us&c=ca&lang=en&prod=mfc7420_all

good luck
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that's easy thing, you should right click on printer icon and in property, check that option, you will find that optop paper feed, change it from manualy to automatic.