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Faded density on an HP color printer...

I'm not an HP printer guru, but have been in the business machine service industry long enough to "guess" what my customer's problem is, and I am just looking for some support or afformation of my opinion.
They have an HP 3700N color printer that even though they have just replaced all the color modules with genuine HP supplies, still doesn't print as densly as they (or even I for that matter) feel it should.
My thought is that it's probably the transfer unit (drum/belt module). I see that they are supposed to good for a general yeild of 60-75K, and this customer has no recollection at all of ever replacing it before with 135K on the printer.
Also, there is definitive consistant fading from left to right on the prints. One other thing that may be related but I found "weird" is that the header of the internal test pattern which should be "HP blue" is actually almost a light purple but the remaining color parts of the test sheet (blues/reds/yellows) seem to fine as far as color goes, the slight density problem not withstanding.
Any supporting opinions would be helpful. Thanks in advance. Jim

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  • Anonymous May 15, 2008

    All new cartridges; was OK until I replACED YELLOW...THEN EVERYTHING
    PRINTED YELLOW AND BLACK. CHANED ALL THE CARTRIDGES TO NEW ONES,
    INCLUDING YELLOW...NO DIFFERENCE AT ALL... STILL YELLOW.

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I think you are on the right track with the drum unit.

Posted on Feb 29, 2008

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