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  1. #1
    Senior Tech 250+ Posts
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    Lexmark W850 light prints

    I have a pair of these at the same customer with the same problem. The prints are light over the entire page, image is also light on the drum. The customer tells me they had this problem about a month ago also, and replaced the drum units which solved the problem for a short while but then it went back to light prints. I assume this is a toner supply issue, but I have trouble believing it would happen on two machines in the same office. What else could be happening?

  2. #2
    Service Manager 10,000+ Posts
    Lexmark W850 light prints

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    Re: Lexmark W850 light prints

    Quote Originally Posted by mascan42 View Post
    I have a pair of these at the same customer with the same problem. The prints are light over the entire page, image is also light on the drum. The customer tells me they had this problem about a month ago also, and replaced the drum units which solved the problem for a short while but then it went back to light prints. I assume this is a toner supply issue, but I have trouble believing it would happen on two machines in the same office. What else could be happening?
    1) laser is dirty/failing
    2) compatible drums/toner
    3) transfer roller defective

    what have you done to fix?
    what are the page counts?
    any error displayed?
    do you have the manuals?

  3. #3
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    Re: Lexmark W850 light prints

    Quote Originally Posted by Phil B. View Post
    1) laser is dirty/failing
    2) compatible drums/toner
    3) transfer roller defective

    what have you done to fix?
    what are the page counts?
    any error displayed?
    do you have the manuals?
    1. Replacing the drum unit (including developer) temporarily solved the problem, so it's not that.
    2. They're using genuine toner & drums.
    3. The image is light on the drum, so it's not transfer.

    There aren't any codes, the meter can't be read because the menus are locked out by a password that the customer doesn't remember, and the manuals are completely unhelpful.

    Like I said, it's clearly a toner supply issue, since replacing developer solved it for a week or so before it started to degrade again, but I don't understand both machines having the same problem.

  4. #4
    Service Manager 10,000+ Posts
    Lexmark W850 light prints

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    Re: Lexmark W850 light prints

    Quote Originally Posted by mascan42 View Post
    1. Replacing the drum unit (including developer) temporarily solved the problem, so it's not that.
    2. They're using genuine toner & drums.
    3. The image is light on the drum, so it's not transfer.

    There aren't any codes, the meter can't be read because the menus are locked out by a password that the customer doesn't remember, and the manuals are completely unhelpful.

    Like I said, it's clearly a toner supply issue, since replacing developer solved it for a week or so before it started to degrade again, but I don't understand both machines having the same problem.
    Meter should be on config page...

    Sent from my SM-G960U using Tapatalk

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    Re: Lexmark W850 light prints

    Quote Originally Posted by Phil B. View Post
    Meter should be on config page...

    Sent from my SM-G960U using Tapatalk
    Doesn't matter. The reports menu is password locked.

  6. #6
    Service Manager 10,000+ Posts
    Lexmark W850 light prints

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    Re: Lexmark W850 light prints

    Quote Originally Posted by mascan42 View Post
    Doesn't matter. The reports menu is password locked.
    have you cold booted into Diag Mode?

  7. #7
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    Re: Lexmark W850 light prints

    Quote Originally Posted by Phil B. View Post
    have you cold booted into Diag Mode?
    I'll try that, but I think we've slightly gotten off topic.

  8. #8
    Field Supervisor 500+ Posts Woxner's Avatar
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    Re: Lexmark W850 light prints

    might be hv board. these failed a lot on lexmark.

  9. #9
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    Lexmark W850 light prints

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    Re: Lexmark W850 light prints

    Quote Originally Posted by mascan42 View Post
    I'll try that, but I think we've slightly gotten off topic.
    Diag Mode allows you to check Bias readings etc.. I THINK you can print config/test pages also..

    so not totally off topic..

    and yes.. not on THIS model (for me) but similar models the HVPS and wires going to trans roller suck shit.

    the Dell model (B6470?) of the Lex was KNOWN for the HVPS and harness failing.

    if you don't have the manual .. PM me I do have it. ( besides tons more )

  10. #10
    Service Manager 1,000+ Posts
    Lexmark W850 light prints


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    Re: Lexmark W850 light prints

    the Dell model (B6470?)
    7330
    or
    IBM InfoPrint 1985

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