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HP 4000 printer fading print down right side of page

Posted on 2007-03-21
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We have three HP 4000/4050 LaserJet printers that have the same problem printing.  The printed page, a test page, starts off printing fine on the left side of the page then about half way across starts fading to almost unseen text.  We've replaced the toners, transfer rollers, transfer guides, and even the Engine board on one printer trying figure out what is causing this problem.  I thought maybe the connections to the transfer roller was causing the problem, so we replaced the Registration Assembly and still right side fading down the side of the page.  We checked the scanner and tried another just to verify and still no help.  We are at our end of the rope on these printers.  HELP!!!
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Question by:tkdandrea
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Expert Comment

by:joed
ID: 18767797
Have you tried a different brand of toners. I find it starnge that all your printer are experiencing the same problem. The only thing common would be toner and paper. I can't see how paper would do this. Are you using HP toner or refilled toners. It would not be unheard of for a whole batch of refills to be bad.
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Expert Comment

by:LAB25
ID: 18846141
I have seen a similar issue with HP 4100 printing light on the one side and darkening on the other side, in multiple cases it has been the laser assembly causing the issue.
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by:tkdandrea
ID: 18960791
I would think the same thing, except that doing a stop test shows the image on the drum.  It's like the left side transfers and the right side doesn't.  I did go out and purchase a HP toner, but no help.  I also purchased a HP (not a third party) transfer roller.  Again, no help.  Any other ideas?
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Author Comment

by:tkdandrea
ID: 19073638
Found the problem.  The paper feed guide assembly which the transfer roller snaps into was the problem.  The right side was lower then the left.  You won't really notice it unless you were looking for it.  The new part also has been redesigned as far as the area for the transfer roller.  So all the printers are fixed.  I want to thank everyone that answered.  Have a great day!

Tony D.
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