Brother MFC 9340 CDW bad print quality.

[Floppydopda]

My Brother laser printer has started having bad printing quality with colour or B&W. There are horizontal stripes always, even if the original document was good quality.
It does have aftermarket toners which used to be work OK, but now something is causing striping even if I replace the toner or clean the drum.

Picture of problem: http://imgur.com/cL9A23L

Thanks for any help

 

[jaml]

You should check drum imagine unit. When was the last time You repleace them?

Also check waste toner box.
The most simple way to check them is to print Printers consumables page "raport" from printer menu.

IMO: It's imagine unit that you need to repleace.