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Thread: ir550 lines

  1. #21
    Service Manager 1,000+ Posts
    ir550 lines

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    Okay replaced the fan, seemed to help a little. I then pulled the red lead wires from the lower corrona block in the back that lead into the power supply and ran a copy, no change! I am thinking at this point that power supply is dead, although I am stumped how the image can even transfer to the paper with no charge on the lower corona! Gee willakers beav!

    Back later to swap power supply for lower corona, more posting after that. Stay tuned!

    Kelly

  2. #22
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    I am trying to remember the the red leads . tell me does the ac seperation cable go to the hvt block or to the ac seperation hvt if it goes to a plastic block in the back were all the wires go there are resistors that can blow out on you just take a ohm reading on them to compare. the clcs had this block but can't rember if the 550/600 used the block maybe a other tech can rember.

  3. #23
    Service Manager 1,000+ Posts
    ir550 lines


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    Quote Originally Posted by mrfuser View Post
    Okay replaced the fan, seemed to help a little. I then pulled the red lead wires from the lower corrona block in the back that lead into the power supply and ran a copy, no change! I am thinking at this point that power supply is dead, although I am stumped how the image can even transfer to the paper with no charge on the lower corona! Gee willakers beav!



    Kelly
    The lower corona has two sections, the transfer wire, DC charge(working) and the seperation wires, AC charge(possibly not working)

  4. #24
    Tech Specialist 1,000+ Posts Canuck's Avatar
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    Nothing wrong with removing pre-transfer to test. I have actually seen bad pre-transfer corona assemblies drag down the A.C. used in separation. The lines that you get on letter...are they outside the image area on legal and thats why you don't see them? As stated earlier,because of grain legal/ltrr are stiffer in process direction. How many lines? Random lines?Random spacing?All the way through page?Letter when fed from all trays as letter? Duplex,lines on both sides?Post a pic

  5. #25
    Service Manager 1,000+ Posts
    ir550 lines

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    Okay, well it was the high voltage power supply going to the lower corona assembly. Swapped them and the copies cleaned up perfect.

    Now if only I can get a handle on why this machine produces so much static on the paper!

    Thanks all!

    Kelly

  6. #26
    Service Manager 10,000+ Posts
    ir550 lines

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    Most static pron printers are in poor locations.

    Static electricity is electricity that is not moving (static). Rubbing or separating of two different materials typically causes it. One of the materials will become positively charged and the other will become negatively charged. Usually, at least one material has high resistively, that is, non-conductive; the charge will remain on the surface of that material.



    A Machine that is not grounded properly attributes to this cause ={poor discharge}
    if your printer is on a rug, it contributes to the cause
    using a heavy content of cheap recycled paper, causes dust buildup,dust buildup on moving rollers create static
    changing of potential in copy process, creates static
    Cold & Dry locations also contribute
    **Knowledge is time consuming, exhausting and costly for a trained Tech.**

  7. #27
    Field Supervisor 500+ Posts
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    I can attest to the rug/carpet thing. Moved an IR600 to a tiled floor from a carpeted (commercial carpet) and it solved some quality problems which I believe had to do with charge issues.

    I'd recommend avoiding all types of carpet areas. I think these kinds of machines should also have their own breaker. Or at least put an anti-static mat down...if such a thing exists.

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