Question about Brother MFC-8840DN (Bundle) All-In-One Laser Printer

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Print problem There is a margin approx 1" thick down one side of the page where the print quality is very poor. I have tried cleaning all the areas as recommended by Brother and have replaced the Toner and the Drum unit

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  • alan8440 Dec 30, 2007

    I have cleaned the carona on the drum and have checked that it is in the home position
    I can confirm the Brother OEM drum and toner are being used
    If I scan a document the preview looks absolutely fine on the screen
    The band is down the length of the page and is on the back edge
    The band is on all prints faxes and copies



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Stop print before fuser to see if error occurs with print or fusering system?

Make sure you have cleaned carona on drum and returned slider to home position

Check if print ok or if it is just copys?... if just copy clean scanner glass slit

You are using OEM drum and toner arn't you?

There is one last alternative but I won't bother to descibe till I get some more info from you

Posted on Dec 29, 2007

  • Soulvisitor
    Soulvisitor Dec 31, 2007

    Does the fault exist when you do a internal print, on keyboard press quickly menu * 2 8 6 4 then maintence shows in display press 77 set/start, a print occurs is that ok? 99 return machine to normal DO NOT USE ANY OTHER NUMBERS.

    Does this happen only when scanning & copyng or does it occur printing and internal printing.

    Ensure you are locating document central on glass.

    If you are getting the problem on internal prints, then

    open cover and remove drum, look inside with a torch, inside about 7cm on ceiling is a slit that runs width of paper clean slit area.

    Also do the stop print halfway test to elimate fuser fault



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I am trying to print a booklet 2 pages per sheet double sided. Printing is OK but spacing is no good for the binding when the pages are cut in two. What instructions should I give the printer to allow...


By spacing, I assume you mean the margins at the centre.

The default margin settings are not the same for the right and left hand side of the page, so the printing on the reverse side is offset from the printing on the first side.

The right margin is always wider to allow for punch holes in file paper.

It is not the printer settings you need to adjust, it is the page layout of your word processing software.

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Run the Print Quality test. Sounds like one of the color cartridges is bad.
Also run the Disable Cartridge test. That will let you test each cartridge by itself.

Before you do that, open the front door halfway. Now you can see each of the color drums in each cartridge. One of them may have a 1/2" stripe on the drum on the left side.

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If the FS-1000 prints too far down the page or leave too much top margin or leaves a gap at the top of the page etc (<- for google searches). This is a problem with the felt pads on the three solenoids/clutch electro magnets that are under the right panel (2 under the engine/button board, 1 under the inner plastic cover, sometimes 4 in total on other kyocera printers). They get compressed over time meaning the metal leavers come into contact with the solenoid meaning they are released too slowly. Simply replace the felt pads with .5mm cardboard or another non-sticky non-metallic material. Too thick and it prints too far up the page.

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Installed new toner. Printer prints well, except approx 1 inch of vertical line doesn't print about 1/2 inch from right margin. Have gently shaken cartridge, run a cleaning paper, reiserted cartridge.

Assuming none of your print area margin settings have been changed, it sounds like you may have a defective drum. You can try carefully cleaning the corona wire, a hair thin wire, with a dry cotton swab. Do not touch the drum! The drum is an integral part of the toner cartridge. Return it to the store as defective.

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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

Sqeaky paper feed the HP site for your printer Over time, particles of toner and paper accumulate inside the HP LaserJet 2300 series printer. This can cause print-quality problems during printing. Cleaning the printer eliminates or reduces these problems. Clean the paper path and print-cartridge areas every time that the print cartridge is changed or whenever print-quality problems occur. As much as possible, keep the printer from dust and debris. Cleaning the outsideback to top of page Clean the outside of the printer with a cloth that has been dampened with water. NOTE: Do not use ammonia-based cleaners on or around the printer. Cleaning the paper path and print-cartridge areasback to top of page Over time, particles of toner and paper accumulate inside the printer. This can cause print-quality problems during printing. Cleaning the printer eliminates or reduces these problems. Use the following steps to clean the paper path and print-cartridge areas: 1. Turn the printer off and unplug the power cord. 2. Open the top cover. Figure 1: Top cover opened example 3. Remove the print cartridge. Figure 2: Print cartridge removed example CAUTION: To prevent damage to the print cartridge, do not expose it to light for more than a few minutes.Be careful not to touch the transfer roller (the black, rubber roller located underneath the print cartridge). Skin oils on the roller can cause print-quality problems. 4. With a dry, lint-free cloth, wipe any residue from the paper path area and the print cartridge cavity. Make sure not to touch the transfer roller with fingers, as the oil can contaminate the roller, resulting in print quality defects. Figure 3: Paper path area and print cartridge cavity example 5. Reinstall the print cartridge and close the top cover. Figure 4: Print cartridge reinstalled example NOTE: If the print cartridge is difficult to reinstall, make sure that the registration plate has been flipped back down into position and that the print cartridge is pushed firmly in place. 6. Plug in the power cable and turn on the printer. Cleaning the fuserback to top of page Run the printer cleaning page to keep the fuser free of toner and paper particles that can sometimes accumulate. Accumulation of toner and particles can cause specks to appear on the front or back side of print jobs. To ensure optimum print quality, HP recommends using the cleaning page every time that the print cartridge is replaced or on an automatic pre-established interval. The cleaning procedure takes about 2.5 minutes to complete. A message (either CREATING CLEANING PAGE or CLEANING) appears on the printer control panel display while the cleaning is taking place. NOTE: Use plain paper to print the cleaning page. Please note that this is a two-step process. First print out the cleaning page using the following directions, then follow the directions on the cleaning page itself to reinsert it back into the printer to perform the cleaning. Use the following steps to run the cleaning page: 1. If the printer model includes a duplexer, open the rear output bin. 2. Press example(Select button) to open the menus. 3. Use example (Up button) or example (Down button) to scroll to CONFIGURE DEVICE, and then press example (Select button). 4. Use example (Up button) or example (Down button) to scroll to PRINT QUALITY, and then press example (Select button). 5. Use example (Up button) or example (Down button) to scroll to CREATE CLEANING PAGE, and then press example (Select button). 6. Perform the following to complete the cleaning process. 1. Remove all paper from Tray 1. 2. Use example (Up button) or example (Down button) to scroll to CONFIGURE DEVICE and then press example (Select button). 3. Use example (Up button) or example (Down button) to scroll to PRINT QUALITY and then press example (Select button). 4. Use example (Up button) or example (Down button) to scroll to PROCESS CLEANING PAGE and then press example (Select button). 5. Load the cleaning page created in step 5 above into Tray 1 with the print side down and the arrow towards the printer. 7. If the printer model includes a duplexer, close the rear output bin. Let me know if that helped. Good luck, Tim

Mar 14, 2007 | HP LaserJet 2300 Printer

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