Question about Brother HL 5150D Laser Printer

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PRINTING VERY GREY NOT BLACK - Brother HL 5150D Laser Printer

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You should clean your laser unit is a black box mounted on the top of the printer.
We need to open this box and clean each of the windows and mirrors you find in it.

Good luck.

Posted on Apr 24, 2012

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Poor quality "black" may be the result of improper voltage designed to pickup the toner and transfer it to the drum. Or, you may have a poor quality toner (or the wrong toner) in the cartridge. Various manufacturers have different toners based on electrical charge. There is both a "positive" charged toner and a "negative" charged toner. In fact, libraries that use micro film printers often have white letters on a black background... ugly and hard to read. If you take the toner cartridge and put in a positive toner in the library cartridge, you can actually switch the polarity and the image and end up with black letters on a white background. .... really neat and it works!

Clean off the wire on your cartridge unit. You can remove it from the machine, look for a tab on the top that can move back and forth to clean the wire. If you are getting streaks down your page, it can either be an old drum (which you will have to replace) or a piece of lint or dust attached to the toner wire. Once you clean off the wire and remove the lint or dust, it will not leave the streak.

I know some more but that's enough for now. Good luck.

Posted on Mar 29, 2011

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