Question about Brother MFC 4800 All-In-One Laser Printer

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Brother MFC 4800. Faxes at receiving end have a line down page

I have cleaned the glass strip under the toner drum but that has not removed the line. Help please!

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Clean the wire in the drum (remove drum and place it upside down) by moving the blue plastic tab from left to right several times.

It fixed the problem for me.

Posted on Apr 06, 2009

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Brother 7840 MFC blank stripe down every printed page


1. Turn off the machine's power switch. Unplug the telephone line cord first, disconnect all cables, and then unplug the power cord from the AC power outlet.

2. Lift the document cover.
In the ADF unit, clean the white bar (1) and the scanner glass strip (2) under it with a soft lint-free cloth moistened with water.

Note

In addition to cleaning the glass strip with a soft lint-free cloth moistened with water, run your finger tip over the glass strip to see if you can feel anything on it. If you feel dirt or debris, clean the glass strip again concentrating on that area. You may need to repeat the cleaning process three or four times. To test, make a copy after each cleaning.

3. Plug the machine's power cord back into the AC power outlet first, and reconnect all cables and telephone line cord. Turn on the machine's power switch.

In Case You Still face Problem and Need Online Assistance Then Please Follow Us For On : Brother Printer Support

Feb 27, 2014 | Brother MFC-7840W Multifunction Laser...

1 Answer

White streak vertical down center of printed page


I tried all of the above but nothing worked. Brother's support didn't help either. I changed drums and toner cartridges to no avail. My copier is a MFC 8640D, but this should work on most laser printers.
I fixed my problem with a very simple solution, that I didn't find posted anywhere else. I removed the toner/drum unit (easy to do) and looked at the top of the bay where it was located. There is a recessed glass strip running the width of the opening that the laser uses to copy the image to the drum. I wiped it with a soft cloth and removed some toner residue, and then used a q-tip to further clean the entire length of the glass strip (it's called the laser prism). This removed the residue and my copies were crisper and the white streaks were gone. Hope this helps someone and saves you some time.

Jun 11, 2011 | Brother MFC 8500 All-In-One Laser Printer

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Receiver end of faxes shows vertical black line. I changed drum and toner also cleaned glass scanner. I do not have a glass flatbed scanner only an automatic feeder.


The cause of this problem is usually a dirty scanning glass (there might be ink or white out on the glass). Check the glass really closely or the cause could be dirty optics or a bad CCD board. There are mirrors underneath the scanning glass. Dirty optics can cause lines when faxing or copying. If you can not access these mirrors, they would have to cleaned by a technician.

Sep 08, 2009 | Brother MFC 4350 All-In-One Laser Printer

1 Answer

MFC-9440 CN--Lines in my auto feed scanned/faxed copies


clean the thin strip of glass located under the document feeder with something non abrasive

Feb 06, 2009 | Brother MFC-9440CN Laser Printer

1 Answer

My fax Machine has lines going each page that prints out


Get a can of air, open the unit and blow it out.
Also, clean the glass.
That should help solve the problem

Jan 08, 2009 | Brother MFC 4800 All-In-One Laser Printer

1 Answer

Vertical lines on photocopies/faxes


The MFC-7420 Manual recommends cleaning the scanner glass and white plastic bar above it with isopropyl alcohol. Page 11-22 has a diagram.

I am having a similar problem but cleaning it did not work. But try that first.

Oct 15, 2008 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Brother MFC 4800 print quality problem


I would try cleaning the drum unit.
Take the drum unit out of the printer.
They recommend that you place the drum unit on a drop cloth or large piece of disposable paper to avoid spilling and scattering toner.
1. Carefully turn the drum unit upside down.
2. Clean the primary corona wire inside the drum unit by gently sliding the tad from right to left several times. (Be careful with the corona wire they are delicate.)
3. Return the tab to the Home position before reinstalling the drum unit. (If you do not position the tab at the home position, printed pages may have vertical lines.)
4. Re-install the drum unit.
5. Close the top cover.
6. Plug in the power cord.


Hope this helps.
Good Luck.

Apr 09, 2008 | Printers & Copiers

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

1 Answer

Thick Black Line on my copies and faxes


Can't image it being anything but scan glass, if prints are fine, are you sure you cleaning scan glass(inside of where originals are fed)?

If so then scanner lamp faulty, but I've never come across it myself on this model.

Oct 26, 2007 | Brother MFC 8500 All-In-One Laser Printer

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