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  1. #11
    Service Manager 2,500+ Posts
    KM 4050 light prints and copies on one end

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    Re: KM 4050 light prints and copies on one end

    By the way...are you a tech or an end user? Did you run all the necessary simulations for replacing the PM parts?

  2. #12
    Service Manager 2,500+ Posts tsbservice's Avatar
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    Re: KM 4050 light prints and copies on one end

    I'm not Kyocera specialist by any means but from your image I bet your laser unit poly mirror is dirty. Remove and very carefully open and clean inside especially polygon mirror.

    That's if you're presumably already changed drum and dev.
    Last edited by tsbservice; 12-09-2020 at 06:40 PM. Reason: Add info
    A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.

    Blessed are they who can laugh at themselves, for they shall never cease to be amused.

  3. #13
    Service Manager 2,500+ Posts
    KM 4050 light prints and copies on one end

    BillyCarpenter's Avatar
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    Re: KM 4050 light prints and copies on one end

    Quote Originally Posted by tsbservice View Post
    I'm not Kyocera specialist by any means but from your image I bet your laser unit poly mirror is dirty. Remove and very carefully open and clean inside especially polygon mirror.

    That's if you're presumably already changed drum and dev.
    Thanks for chiming in. Yes, he said he replaced drum and DV. I asked him about the laser slit glass but didn't think about the polygon mirror. It's been a minute since I've seen one of these old machines.

  4. #14
    Service Manager 2,500+ Posts tsbservice's Avatar
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    Re: KM 4050 light prints and copies on one end

    Quote Originally Posted by BillyCarpenter View Post
    ... It's been a minute since I've seen one of these old machines.
    Lucky you I never seen one.
    A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.

    Blessed are they who can laugh at themselves, for they shall never cease to be amused.

  5. #15
    RTFM!! 2,500+ Posts allan's Avatar
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    Re: KM 4050 light prints and copies on one end

    Pulling teeth on this one Bill.

    So the dev and stuff got changed. And you mention last year or so.. Stuff was in there for some time.

    Lift the machine at an angle so the dev can run to that side of the roller. 90 degrees is just to much angle on there. I would say 15 degrees or so.
    So get a wooden block and place it under one side of the printer and call it fixed.
    Only kidding...

    Print 10 pages like that and see if the dev moves. Will not find the stuff i come up with in any manual.

    The transition from black to void does not look like laser precision.
    Whatever

  6. #16
    Service Manager 2,500+ Posts
    KM 4050 light prints and copies on one end

    BillyCarpenter's Avatar
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    Re: KM 4050 light prints and copies on one end

    Quote Originally Posted by allan View Post
    Pulling teeth on this one Bill.

    So the dev and stuff got changed. And you mention last year or so.. Stuff was in there for some time.

    Lift the machine at an angle so the dev can run to that side of the roller. 90 degrees is just to much angle on there. I would say 15 degrees or so.
    So get a wooden block and place it under one side of the printer and call it fixed.
    Only kidding...

    Print 10 pages like that and see if the dev moves. Will not find the stuff i come up with in any manual.

    The transition from black to void does not look like laser precision.

    I agree. I thought it was a DV problem from the jump.

  7. #17
    Defective Technician 50+ Posts
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    Re: KM 4050 light prints and copies on one end

    It's a Mono machine, no Developer. If he didn't run Sim 130 the developer tank is probably not completely full of toner. Could be the old style charger in that kit which causes a similar issue.

  8. #18
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    Re: KM 4050 light prints and copies on one end

    Last year when I installed the kit it worked like new.
    Only recently has it started to have this issue.
    The magnetic roller to is coated uniformly from end to to end.

    Is there a way to get to the mirror without completely ripping down the machine?


    I am the end user but have some technical knowledge ;-)

  9. #19
    RTFM!! 2,500+ Posts allan's Avatar
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    Re: KM 4050 light prints and copies on one end

    Quote Originally Posted by Hose1cook View Post
    It's a Mono machine, no Developer. If he didn't run Sim 130 the developer tank is probably not completely full of toner. Could be the old style charger in that kit which causes a similar issue.

    Thanks for the correction.
    Whatever

  10. #20
    Master Of The Obvious 10,000+ Posts
    KM 4050 light prints and copies on one end

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    Re: KM 4050 light prints and copies on one end

    There are a couple of possibilities:

    It's relatively easy to get the primary charger tipped at an angle when inserting. Make sure it's inserted properly.
    Also common, broken transfer bushing or dislodged contact spring.
    Yes a dirty polygon mirror or slit glass is possible based on age alone. It will come out from the engine top cover. Relatively easy, but I would check that last.

    So is your sample a copy or a print? I would try a print from USB to rule out scanner optics. =^..^=
    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 =^..^=

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