Question about Brother MFC 7420 All-In-One Laser Printer

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White vertical line on pages from brother mfc-7420 printer

I have cleaned the drum, and used a different toner cartridge. I have wiped out the inside of the drum and toner area.The line is 2 and a quarter inches from the right side of the page. thanks

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Do a half print test......send a print job to the printer listen to the printer...as soon as you think the printer has printed a bit of doc inside the printer..not reaching the fusser ......turn off the printer

Remove the cartridge.....and watch the print inside on the paper can you see the marks.....if so than its your cartridge that is marking your print....

remove the paper by slowly pulling it be careful not to tear it

If the print hadn't been marked on half test.....remove the fusser unit and examine the Teflon cover for marks....try to remove stains off if there is.....avoid marking the Teflon as this will mark more on the print

do advise if this worked if not than you have some more options

Cheers!

Posted on Nov 11, 2008

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My Brother MFC-7420 Printer always prints black lines and splotches down the left side of my paper. This happens whether I'm scanning or printing from my PC. When I looked at my drum, it appears a


If you are seeing vertical streaks/black lines your primary corona wire is dirty and or the fax scanner may be dirty.
1)To clean the corona wire you take the drum unit and toner cartridge and place it on disposable paper to avoid spilling.
2) Clean the primary corona wire inside the drum unit by sliding the blue tab from right to left several times.
3) Return the blue tab and snap it into the home position.
4) Reinstall the drum unit and toner cartridge.
5) Close the front cover.
Caution: if you do not return the blue tab to the home position it may repeat the black lines.

Nov 29, 2012 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Brother MFC 7440 - white line running vertically through printed page.


If its a laser printer you might have a line on the drum. Lift the flap on the toner cartridge and spin it to see if you have anything on it. Also the drum. When you find the line take a soft brush or lint free glove and lightly remove it Your problem should be solved. If a inkjet printer you need to clean print heads. To do this go to your printer model in control panel and right click you will see in the list the utility. Some times in properties. Choose to clean heads You might have to do it a few times.

May 27, 2012 | Brother MFC-7440N Laser Printer

1 Answer

Brother MFC-7420 just started printing a shadow image


Sounds like a bad drum cartridge. Pull the toner/drum cartridge out of the machine and set it down. Press down on a (blue?) tab to release the toner cartridge, and you can lift the toner cartridge out of the drum cartridge. There is a cleaning blade in there - a soft plastic blade that rides against the drum and scrapes off toner that didn't get transferred to the paper. If it gets stuck off the drum surface, images repeat a few inches (one drum circumference) down the page.

A new DR-350 drum unit should fix it. have the machine's power on when replacing it. While the door is open, touch the CLEAR key. The display will read "REPLACE DRUM?" or something like that. Press 1 for Yes.

Jan 05, 2010 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Everything is printing black n dirty


Most likely cause is a bad toner cartridge. It's likely dumping excessive toner inside the printer. try taking the toner out and hold it sideways and tap it, if toner falls out then your cartridge is defective. try vacuuming the printer and wipe it clean with a dry cloth and and replace the toner with a new one.

Oct 05, 2009 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Printed sheets come out with blackish/greyish lines on the right side


Use follow these cleaning steps for your printer:

1. Open the front cover of the printer and remove the drum/toner unit.
2. Gently wipe the scanner window with a soft dry cloth. The scanner
window is located on the roof of the inside of the printer.
3. On the top of the drum unit, locate the blue tab on the left side.
Slide it back and forth across the drum about 30 times.
4. Remove the toner cartridge (TN430 or TN460) from the drum unit
(DR400). To remove the toner from the drum: hold down the blue lever on the right side of the drum (DR400) and lift the toner (TN430 or TN460) off of the drum unit.
5. Inside the drum unit (DR400) there is a green roller. Wipe the green
drum roller with a dry tissue (i.e. Kleenex). You may turn this roller
by moving the gears on the far left side.
6. If the pages area gray pages or have gray vertical lines, install a
brand new toner cartridge. If pages have dots, spots, smudges or
horizontal lines, install a brand new drum unit.
OR
If you are still experiencing gray pages or gray vertical lines,
please install a brand new toner cartridge (TN430 or TN460).

Brother strongly recommends that customers do not use generic drum unitsand/or toner cartridges, or refill their Brother toner cartridge. Each Brother laser printer is designed to work at pre-set temperatures that are matched exactly to each of our individual toner formulations. Each individual component is designed to work with the other to ensure quality and reliability. Using non-Brother supplies may affect the hardware performance, print quality and machine reliability.
The Brotherlimited warranty does not apply to any problem that is caused by the useof unauthorized third party drum units, toner cartridges or toner.

If I have helped please rate my post...I will always do my best to help

Sep 11, 2009 | Brother HL 1230 Laser Printer

1 Answer

Vertical black line on all print outs


1) Check the cartridge. Look at the egg color drum and see if there is any built up toner. If there is then wipe off with soft cloth and reinstall.
2) Does this happen when coping from the flat bed and the doc feeder at the top?
If it it's only from the top then there is a glass lense that might have white out on it.
This is common when using white out and not letting it dry long enough.
To get to the lense it my be tricky but if the top of the feeder open a little from the top pop it open and
the glass is a thin 1/4 strip. Wipe it clean then try again. Hope this helps. Boats

Oct 07, 2008 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

BROTHER MFC 7420 PRINTER SOLID VERTICAL LINE...


Open te lid and look at the glass. You have dirt or white-out or something on the thin strip of glass to the left. Clean that glass!

Good luck!

Oct 07, 2008 | Brother MFC 7420 All-In-One Laser Printer

2 Answers

Brother MFC 9700


Remove your drum unit and you will see on top of where the drum unit sits inside your machine is a piece of glass(inside the machine). Wipe the glass with a soft dry cloth. If this do not work, remove your toner cartridge and see if the toner is spread evenly on the cartridge.

Mar 17, 2008 | Brother MFC 9700 All-In-One Laser Printer

2 Answers

Print quality bad


To clear white vertical lines from printed documents follow the steps listed below:

NOTE: The use of non-Brother or generic toner may cause white vertical lines.

Brother strongly recommends that customers do not use generic drum units and/or toner cartridges, or refill their Brother toner cartridge. Each Brother laser printer is designed to work at pre-set temperatures that are matched exactly to each of our individual toner formulations. Each individual component is designed to work with the other to ensure quality and reliability. Using non-Brother supplies may affect the hardware performance, print quality and machine reliability.
The Brotherlimited warranty does not apply to any problem that is caused by the useof unauthorized third party drum units, toner cartridges or toner.

1. First, power OFF the unit for safety. The ON/OFF switch is located on the left, rear side of the unit.

2. Open the scanner cover by pulling the blue lever located below the control panel toward you and lifting the cover. Make sure the cover is completely open.

3. Remove the drum unit by holding each side of the drum by its handles and gently lifting the drum forward (toward) you.

4. Place the drum unit on a drop cloth or large piece of disposablepaper to avoid spilling and scattering the toner. Make sure thedirections and DR-250 stickers are facing you.

5. With the drum removed from the Brother machine, clean the laser glass. The laser glass is located inside the Brother machine where the drum was located. It is a piece of glass, about 1/2 inch wide and approximately 8 inches long, located on the bottom of the inside. Gently wipe the glass with a clean soft DRY cloth. DO NOT use isopropyl alcoholor any liquid to clean the glass.

6. Gently pull up on the mauve lever to turn the toner cartridge toward you until it stops. Remove the toner cartridge from the drum unit by gently sliding it out of the drum unit. ***Handle the toner cartridge carefully. If toner scatters on your hands or clothes, immediately wipe it off or wash it with cold water.

7. Gently rock the toner cartridge from side to side five or six times to distribute the toner evenly inside the cartridge. Then, reset the toner into the drum (be sure it clicks into place). Gently push on the mauve lever to turn the toner cartridge away from you until it stops.

8. With the DR-250 sticker facing you turn the drum upside down. There is a blue tab located on the right side. Slide the blue tab back and forth seven times to clean the corona wire. When finished, make sure the blue tab is locked to the right side of the drum.

9. Reset drum unit in Brother machine. Close the cover securely.

Print the help list to test the unit by pressing the REPORTS key located on the control panel and then (1) on the dial pad.

If the white vertical lines still continue, the drum unit will need to
be replaced.

If the purchase date of the original drum or replacement drum is less than 90 days (within the warranty of the drum), contact Brother Customer Service Center at 1-877-Brother (1-877-276-8437) . The center is open Monday-Friday, 9:00am to 7:00 pm EST, excluding holidays.

Dec 26, 2007 | Brother MFC 6800 All-In-One Laser Printer

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