Question about Brother MFC Office Equipment & Supplies
Papers print with a faded strip on the side of the paper. Replaced the toner and the drum - made no difference. What else can I try? Printer only 2 years old & only light use.
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Posted on Jan 02, 2017
SOURCE: Brother MFC 7420 Paper Jam
After changing the drum, toner and running around town for days trying to find a reliable place to get this printer repaired, I realized I was spending a lot more money than what the printer actually costs. the drum was over $100, toner was $80, and the printer is $250. I bought a new one, and I can now use the old one for parts.
Posted on Jan 16, 2008
This type of printing defect is normally caused by 1 of a few problems - the easier one first:
1. Toner cartridges sometimes do not have the toner evenly distributed - close the toner cartridge and inspect the hopper right below it for even distribution of toner.
The harder ones:
2. This type of defect can also be caused by dirty charging section - for the drum to pick up the toner it must be charged electrically prior to exposure - if the charge grid is not clean then it will not give the drum an even charge - not sure were this is in this printer yet - looks like it comes as part of the drum kit so this should not be causing this issue.
3. The last and most difficult to check is paper alignment with the drum - is the paper contacting the drum evenly - look for possible problems in the paper path with the drum unit removed - look for something uneven around the area were the paper contacts the drum
Posted on Apr 12, 2008
SOURCE: Problem with the printer drum?
Sounds like the toner isn't sticking to the paper.
Open the top cover of the printer. You will see two yellow felt stickers with a black triangle on them. On either side of those stickers you will see two gray or green tabs. If the tabs are sitting up pull them down towards you so you can see the picture of the envelope on top. Close the cover and try to print.
Posted on Jul 19, 2008
There are two possible solutions to this common problem.
1) The Cyan cartridge may not be in 100% of the way. If the handle of the Cyan cartridge prutrudes even slightly, it can obstruct the printhead for the black developer. Remove and reinstall the Cyan cartridge and test.
2) The printhead is dirty, with some toner spillage on the printhead. All new imaging drums also include a new cleaning pad for the cleaning wand.
The cleaning wand is designed to clean toner off of the printhead. you can see this in your printer manual, but basically, just open the front cover, pull the the blue handle on the right side forward ( this opens the access cover for the cleaning wand on the right side of the printer ).
gently pull the cleaning wand out ALL THE WAY, then slide it back in ALL THE WAY. do this several times.
The cleaning wand is intended to travel across the print head in only one direction, which is why you should make sure that it is pulled all the way out.
One of these two solutions should fix your problem. If the problem is resolved, but then reappears after a short time, then you have a defective developer that is leaking toner on the print head. The color of the defective developer can be determined by the color of the cleaning pad after cleaning the printhead as discribed above.
Posted on Sep 28, 2008
This is caused by one of two things.
1) One of the handles on the toner cartridges is not seated all the way down. 90% of the time, this is the problem, and of that, most of the time it is the cyan cartridge that is not seated properly.
2) there is toner covering part of the print head. Sometimes this is just a temporary problem that can be fixed by simply cleaning the printhead lens with the cleaning wand. ( i will explain that in a moment). If cleaning the printhead works, but then the problem reappears shortly afterwards, then you have a more serious problem in that the developer housing for one of the toners is defective and leaking onto the printhead. When cleaning the printhead, make note of the most prominent color on the cleaning wand pad, as this is probably the defective housing's color.
To clean the print head
a) Open the front cover.
b) on the right hand side, slide the lite blue handle forward. This will open the access hole for the cleaning wand on the right hand side of the printer.
c) pull the cleaning wand out ALL OF THE WAY until it comes to a stop. Then slide the wand back in ALL THE WAY until it can not go in any further.
Repeat step "c" several times.
DO NOT move the wand back and forth unless you pull it all the way out and all the way back in. This will only smear the toner back and forth across the print head. when it is pulled all the way out it hits a lift that will lift it up and over the print head on the way back so it does not move backwards across the printhead.
the fuser is fine, and one of the two solutions above will fix your problem.
as I said though, if the problem is quick to return, then one of the developer housings are leaking.
Posted on Nov 17, 2008
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