Question about Brother IntelliFAX 4100 Laser Fax

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Print is very light even though the drum and toner cartridge are new. Switching to a different new toner cartridge made no difference. The slider which is used to clean the (corona) wire has been operated. I just cannot see any way to adjust the print to be darker...in the printer control or on the printer itself. Any suggestions?.

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  • Brother Master
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It is problem your mfc is toner sever mode or laser unite is dirty
please chack it and solve your problem
Thanks tareq

Posted on Jul 31, 2009

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Posted on Jan 02, 2017

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What causes streaky copies


A few questions:
- Did this problem just start?

- Was there a paper jam and when the paper was dislodged the next few sheets were streaked? Running a few more pages usually clears this.

- Is this a new toner cartridge? Did you just change the cartridge? Are you low on toner? Try removing the cartridge and gently rocking it back and forth, side to side. This will distribute the toner more evenly.

- Is this a heavier weight paper then previously used? Try going back to the old weight and see if the problem continues.

Aug 19, 2014 | Brother MFC-8860DN All-In-One Laser...

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MFC-9840 printing Yellow/Red/Blue strips in background. Any ideas why?


This is caused mainly by leaving the Corona Wire sliders anywhere other than where the arrows on the slider meets the arrows on the Drum Units. This leaves solid lines of colour down the length of the page (one per colour with the slider in the wrong place) if it is leaving more than the single line on the page it is probably leaking cartridges.

These particular cartridges are known for their ability to leak badly (OEM and Remanufactured cartridges do it). The only option for a leaking cartridge is to replace it and clean out the machine with a lint free cloth preferably a 'Toner Grabber' cloth. If you nee one of the toner grabber cloths then talk to your local cartridge refilling place for one. If they refil toner cartridges there then they probably have them or can suggest a different option.

Aug 12, 2014 | Brother MFC-9840CDW Laser Printer

1 Answer

Rainbow Color Streaks down the printouts that get worse the more pages printed


This is caused mainly by leaving the Corona Wire sliders anywhere other than where the arrows on the slider meets the arrows on the Drum Units. This leaves solid lines of colour down the length of the page (one per colour with the slider in the wrong place) if it is leaving more than the single line on the page it is probably leaking cartridges.

These particular cartridges are known for their ability to leak badly (OEM and Remanufactured cartridges do it). The only option for a leaking cartridge is to replace it and clean out the machine with a lint free cloth preferably a 'Toner Grabber' cloth. If you nee one of the toner grabber cloths then talk to your local cartridge refilling place for one. If they refil toner cartridges there then they probably have them or can suggest a different option.

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1 Answer

Print copy is very light. Is there an adjustment?


Usually light prints on a Brother just mean a bad toner cartridge, but try these first:
  • Most Brother drum units have a slider that you push back and forth. It's probably blue plastic. Sliding that wipes dust off a charging wire in the drum unit, where cleanliness is essential to getting a clean, dark print.
  • While you have the drum & toner out, look inside the machine for short, shiny steel wires on the inside walls. Those wires contact metal in the drum unit to transfer the high voltages required to get toner onto the paper. Clean those wires and contacts with a little wire brush or even a pencil eraser. Chances are, you've been pulling out your toner/drum assembly while this problem has been bothering you, and that has probably cleaned all the contacts enough.
  • Look at the slot in the top of the drum unit where you can look in and see the drum. The laser shines down through that slot to draw the image on the drum that will eventually be your print. Look up into the top of the chamber where the drum-toner sits, and you'll find a skinny glass window. Gently wipe that clean. Any dust or toner there will lighten your print. Be careful not to knock any of the tiny, black levers that stick up into the bottom of the area. Those are paper sensors, and they have to be delicate, so they can be moved by the paper passing over them.
I expect that none of these will help, and you'll have to get a new toner cartridge. If the old cartridge is still new, take it back to the store along with print samples. Maybe even bring the printer so they can test their toner themselves. They might just swap it for a fresh one; it's worth a try.

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We have just changed our drum unit but the drum light is still flashing. The printer is printing though. Any suggestions?

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unfortunately the drum within the cartridge has reached end of life so changing to a new drum cartridge would resolve this issue.

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Muratec 2830 drum cartridge problem.


The drum cartridge is different from the toner cartridge. The drum has reached its life cycle and must be replaced. This is normal for any copier of that class.
The drum is not too expensive and not difficult to replace.

Hope this helps!




Sep 09, 2009 | Office Equipment & Supplies

1 Answer

Brother HL5140 won't print


Sadly this happens all the time - we have about 12 of these printers and 2 have the same problem at this moment and the only fix we have found previously is to replace the drum unit with a brand new one which is hardly economical - indeed the machines are all NHS funded and often the solution has been to throw the printers with this problem away and we have a few defunct ones piled in a corner because of this - if anyone knows why and how this happens ( the tech dept locally has no ideas but just wupply an new printer as they are cheap) I would be very interested also - changing the drum and cartride to a partly used one from a different machine does nothing at all either so it has to be something to do with the chip in the new drum resetting the machine but how and why is beyond us. In every case the printer prints perfectly before the fault and after the change to a new drum so I can only assume it is a way of generating more drum sales??

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1 Answer

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