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  1. #1
    Field Supervisor 500+ Posts
    Hp 4250 /Periodic quality issue


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    Hp 4250 /Periodic quality issue

    HI
    I get a black bar across top of print about 1.5 inches wide ,running from side to side of print
    every so often,maybe 1 in 7 or 8 prints.I put a new cartridge in and still have problems.i thought I had this problem once before but not sure what took care of it.Thanks for any insights.
    Andy

  2. #2
    Field Supervisor 500+ Posts Wild Bill's Avatar
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    Re: Hp 4250 /Periodic quality issue

    I have had a less common problem. There are normally multiple lines though, They look like a "Venetian Blind effect."
    The problem is in the Power supply board. It's possible it is just beginning to go out. Not sure if this helps but that's all I have if you have ruled out the toner and the fuser.
    Izzy

  3. #3
    Master Of The Obvious 10,000+ Posts
    Hp 4250 /Periodic quality issue

    blackcat4866's Avatar
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    Re: Hp 4250 /Periodic quality issue

    sample images? =^..^=
    If you'd like a serious answer to your request:
    1) demonstrate that you've read the manual
    2) demonstrate that you made some attempt to fix it.
    3) if you're going to ask about jams include the jam code.
    4) if you're going to ask about an error code include the error code.
    5) You are the person onsite. Only you can make observations.

    blackcat: Master Of The Obvious =^..^=

  4. #4
    Field Supervisor 500+ Posts
    Hp 4250 /Periodic quality issue


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    Re: Hp 4250 /Periodic quality issue

    Have you taken a look at the laser unit? It may not be getting quite up to speed as printing starts.

  5. #5
    Service Manager 1,000+ Posts theengel's Avatar
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    Re: Hp 4250 /Periodic quality issue

    I think these lasers write black, not white, so you would get white bands, not black ones if it were the laser.

  6. #6
    Field Supervisor 500+ Posts 20 year tech's Avatar
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    Re: Hp 4250 /Periodic quality issue

    Found this in my archive (I am a digital packrat) points to what Phil was talking about, also says to check the contacts on the hvt board as Wild Bill suggests
    Attached Files Attached Files

  7. #7
    Field Supervisor 500+ Posts
    Hp 4250 /Periodic quality issue


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    Re: Hp 4250 /Periodic quality issue

    Hi
    Sorry about not getting back sooner,I went to machine today and replaced transfer roller and cleaned contacts.
    The problem is still there,only happens periodically,may not happen at all one day and 5Xs another day.
    This is an example which I hope helps.
    THANKS FOR ALL THE HELP Andy001.jpg

  8. #8
    Master Of The Obvious 10,000+ Posts
    Hp 4250 /Periodic quality issue

    blackcat4866's Avatar
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    Re: Hp 4250 /Periodic quality issue

    Look at 20 year tech's bulletin. It looks exactly like your sample. =^..^=
    If you'd like a serious answer to your request:
    1) demonstrate that you've read the manual
    2) demonstrate that you made some attempt to fix it.
    3) if you're going to ask about jams include the jam code.
    4) if you're going to ask about an error code include the error code.
    5) You are the person onsite. Only you can make observations.

    blackcat: Master Of The Obvious =^..^=

  9. #9
    Service Manager 10,000+ Posts
    Hp 4250 /Periodic quality issue

    Phil B.'s Avatar
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    Re: Hp 4250 /Periodic quality issue

    Quote Originally Posted by cucuklotz View Post
    Hi
    Sorry about not getting back sooner,I went to machine today and replaced transfer roller and cleaned contacts.
    The problem is still there,only happens periodically,may not happen at all one day and 5Xs another day.
    This is an example which I hope helps.
    THANKS FOR ALL THE HELP Andy001.jpg
    pull the HVPS AND Reseat it .. if that doesn't fix it try new HVPS

  10. #10
    Field Supervisor 500+ Posts
    Hp 4250 /Periodic quality issue


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    Re: Hp 4250 /Periodic quality issue

    Hi
    Sorry about not following up.I have not been back to machine yet but will this week. Thanks for all the insightful
    responses.Ill post when I do call.
    Andy

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