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Black streaks on copies from bypass tray and tray w/thick paper

I've had tons of people trying to figure this problem out on my Gestetner DSc435.
We are getting streaks of black on copies that are printed on heavier stock, i.e. 65lb. and even on lighter weight paper. We've changed the fuser and the black drum on many occasions and we still have the problem. It's strange; however, that it doesn't always do this...especially on paper smaller than 8 1/2 x 11.
Can you shed some light on this for us?

Thanks, in advance for your help!

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Most likely you may of had a toner spill awhile ago and the toner may be biult up with in the paper path and it is draging in it. Also, it may have to do with the drum pick off claw unit. The paper may be rubbing against the unit with thicker paper. I would have your service person clean the whole paper path of lose toner and if they can bring another drum unit to test if the problem is in the drum unit it self. Good Luck

Posted on Dec 05, 2008


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copy and paste the link into your browser.
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