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  1. #1
    RTFM!! 2,500+ Posts allan's Avatar
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    C452 with not the lines of shame.

    Demo page.pdf Gradation.pdf

    Two PDF's one the demo page with nice artifacts to look at in bewilderment.
    The other a gradation page.

    So if I print the bird LEF or SEF the lines follow the image directions not the feed direction. Only LEF follows feed direction.
    That pretty much eliminates the engine with the nice gradation and the weird fact that the lines are in the same place LEF and SEF repeatably.

    Faulty memory buffer?

    The machine is missing a yellow toner bottle...
    Whatever

  2. #2
    Service Manager 1,000+ Posts tsbservice's Avatar
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    Re: C452 with not the lines of shame.

    Color copy show lines of course? Eliminate scanner part, I don't think demo page and gradations have something to do with it. This bird page lines are strange. Weird test - open front door and push laser slit cleaning rod in one of its slots halfway. Block front door and WTB sensors and print bird page.

    Definitely will check out solutions tomorrow and come back.
    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.

  3. #3
    Service Manager 1,000+ Posts
    C452 with not the lines of shame.

    Synthohol's Avatar
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    Re: C452 with not the lines of shame.

    dunno about color but i had that on a mono box years ago and all that fixed it was the laser.
    hope something simple like FW will fix yours.

  4. #4
    RTFM!! 2,500+ Posts allan's Avatar
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    Re: C452 with not the lines of shame.

    Now found that if i remove the rear covers and poke around the pattern inverts from voids to lines.
    Bad solder or bad connector could be possible. Not sure.
    Doubt it is FW.
    Whatever

  5. #5
    Field Supervisor 500+ Posts
    C452 with not the lines of shame.


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    Re: C452 with not the lines of shame.

    Quote Originally Posted by allan View Post
    Now found that if i remove the rear covers and poke around the pattern inverts from voids to lines.
    Bad solder or bad connector could be possible. Not sure.
    Doubt it is FW.
    Sounds logical. I always want things like this to be firmware but it almost never is.

  6. #6
    Service Manager 1,000+ Posts tsbservice's Avatar
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    Re: C452 with not the lines of shame.

    Allan found that:

    Problem
    Image quality on copies, prints, internals. Void areas appear at various locations.
    Solution
    CAUSE: Defective PH unit.

    SOLUTION: Replace the PH unit.
    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.

  7. #7
    RTFM!! 2,500+ Posts allan's Avatar
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    Re: C452 with not the lines of shame.

    Quote Originally Posted by tsbservice View Post
    Allan found that:

    Problem
    Image quality on copies, prints, internals. Void areas appear at various locations.
    Solution
    CAUSE: Defective PH unit.

    SOLUTION: Replace the PH unit.

    Wish i had a spare PH unit to put that to bed.
    Just find it interesting that the lines don't follow the feed direction in both SEF and LEF.
    LEF the voids are in feed direction. SEF the voids are in cross feed direction.
    Whatever

  8. #8
    Master Of The Obvious 10,000+ Posts
    C452 with not the lines of shame.

    blackcat4866's Avatar
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    Re: C452 with not the lines of shame.

    It sounds to me like an image processing issue. I solved an issue like this once by re-seating ribbon cables to the laser unit. I'd also check that you don't have a contact peeling back of the ribbon backing. That is bizarre that the defect rotates with the paper direction. That entirely rules out the engine components. Maybe page memory or HDD? =^..^=
    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 1,000+ Posts tsbservice's Avatar
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    Re: C452 with not the lines of shame.

    May try to format HDD or usnset?
    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.

  10. #10
    RTFM!! 2,500+ Posts allan's Avatar
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    Re: C452 with not the lines of shame.

    Quote Originally Posted by tsbservice View Post
    May try to format HDD or usnset?
    Found the HDD unset on trouble shooting and then set it again.
    Will report back Tuesday or Wednesday again.
    Found a bad looking ribbon cable and trimmed it with no change.
    Whatever

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