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  1. #1
    Technician
    Join Date
    Apr 2016
    Location
    New York
    Posts
    12
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    4

    no black printing

    Hello all,

    I have a HP CLj M553 that will not print black.

    I've change toner
    Ive changed laser scanner
    I've changed High volt board
    I've changed secondary transfer roller
    I've changed transfer belt

    Nothing inside machine looks to be deformed or out of place.


  2. #2
    Senior Tech 100+ Posts
    Join Date
    Nov 2013
    Location
    Sydney
    Posts
    152
    Rep Power
    11

    Re: no black printing

    Have you tried an engine test to see if it formatter related?


  3. #3
    Technician
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    Apr 2016
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    New York
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    Re: no black printing

    I tried a formatter from another working machine


  4. #4
    Just a fellow wanderer 2,500+ Posts Iowatech's Avatar
    Join Date
    Dec 2009
    Location
    Iowa
    Posts
    3,756
    Rep Power
    80

    Re: no black printing

    Try the black toner from the working machine. Especially if the machine is not furnished with HP toner ordered directly from HP.
    I had a CLM 6040 that all three non-OEM black drum units on hand had been baked to a crisp. No error message, and no black print either (CMY was fine). I had to drive to the office and pick up an OEM unit to fix that (around 80 mile round trip). It was a lucky thing that I had another tech helping me out then, while I was on the road he took the black drum units apart and found that the developer had turned rock solid and broke the augers and developer seal release mechanism. We wrecked an entire day figuring that out.
    I suppose you might double check the contacts in the cavity the toner is fitted into as well, but that sounds like a pretty new machine so that's kind of a long shot.
    And that's all I've got for now, unless there are paper jams on the ETB and the machine is making a noise that sounds like the Nostromo's self destruct alarm.


  5. #5
    Technician
    Join Date
    Apr 2016
    Location
    New York
    Posts
    12
    Rep Power
    4

    Re: no black printing

    Did that already


  6. #6
    Service Manager 1,000+ Posts theengel's Avatar
    Join Date
    Nov 2011
    Location
    North Bend
    Posts
    1,206
    Rep Power
    32

    Re: no black printing

    Sometimes when I have color problems with these machines I have to do a nvram dump and/or cold reset, then try calibrating again.


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