Question about HP LaserJet 4200n Printer

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HP Laserjet 4250 printer black band 1 inch top of page

HI, I service these printers frequently but recently came upon one that intermittently prints a 1 inch horizontal black area across the top the page. I suspect that it has to do with uneven voltage going to the toner cartridge's primary charge roller since it's sometimes mottled gray instead of solid black. I already changed out the toner and checked the transfer roller contacts in the printer. Another tech mentioned to me that these 4200 series printer have had problems with the LVPS. Before I change out the LVPS i'd like to know if any other techs that visit here have had any problems similar to this one.Thanks in advance,Scott

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  • jwaibel Apr 16, 2009

    Our 4250dtn frequently prints a dark 1" band at the top of the page.

    It does not happen on a predictable basis (every third, 5th or 10th page for instance) and does not seem to happen when the paper goes through the manual feeder but it does seem to happen 5-10% of the time.



    We have changed the toner cartridge and cleaned the unit but these fixes have not worked.



    Any suggestions that we could take care of (using the maintenance kit, etc.) or should I call a tech

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Before replacing the LVPS, I surely would replace the toner and transfer roller at same time.

Posted on Jan 13, 2009

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a4e2011.jpg

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