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  1. #1
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    Konica C500 Pro duplex top edge erasing

    Hi Everyone,

    I've got a problem with a Konica Minolta Bizhub C500 Pro. The second (duplex) side of an A4 print has a very fat top margin (8mm+), and it can't be corrected with an image shift in Command Workstation. It happens when copying and printing. This suggests that the blanking / erasing is being done by the machine.

    The first side margins are fine, there is no skewing on either side, and all the registration rollers are new. It also happens in all trays including the bypass.

    The customer can get round it by running the paper in A4R, but this isn't an ideal solution. Does anyone have any ideas?

    Thanks in advance..


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    Re: Konica C500 Pro duplex top edge erasing

    I would start by checking the rollers in the duplex path. May have a defect that isn't gripping the paper and causing skew.

    Probably a lower part on the rollers since the a4r doesn't cause the problem.

    It's not a read/write/memory issue since the first side is fine in both copying and printing.

    Quote Originally Posted by copycentre View Post
    Hi Everyone,

    I've got a problem with a Konica Minolta Bizhub C500 Pro. The second (duplex) side of an A4 print has a very fat top margin (8mm+), and it can't be corrected with an image shift in Command Workstation. It happens when copying and printing. This suggests that the blanking / erasing is being done by the machine.

    The first side margins are fine, there is no skewing on either side, and all the registration rollers are new. It also happens in all trays including the bypass.

    The customer can get round it by running the paper in A4R, but this isn't an ideal solution. Does anyone have any ideas?

    Thanks in advance..



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    Re: Konica C500 Pro duplex top edge erasing

    We've replaced all the rollers and we're still getting the problem. The strange thing is that there is no skew, so I was wondering if it could be fixed in Service or Key Operator mode.

    It seems to be an actual 'deletion'. If I use image shift in Command Workstation to move the image up (eg by 4mm), the image does move up but the top margin remains the same. The top part of the image is just erased by a fixed amount of 8mm.

    The bottom margin is about 0.5mm, so the whole second side could do with a simple vertical adjustment upwards, if there is such a thing?


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    Lightbulb Re: Konica C500 Pro duplex top edge erasing

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  5. #5
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    Re: Konica C500 Pro duplex top edge erasing

    Did you try to adjust the print area in service mode?

    ' "But the salesman said . . ." The salesman's an asshole!'
    Mascan42

    'You will always find some Eskimo ready to instruct the Congolese on how to cope with heat waves.'

    Ibid

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    Re: Konica C500 Pro duplex top edge erasing

    Quote Originally Posted by mrwho View Post
    Did you try to adjust the print area in service mode?
    Would you know which adjustment it is?

    I thought it might be 'Print Centring Adjustment' but I can't see an option for the duplex side only. Unless I'm missing something obvious?


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    Re: Konica C500 Pro duplex top edge erasing

    "Printer centring adj. (Tray 1) screen"
    For the printer centering adjustment, the fol-
    lowing items are provided. Press the [NEXT
    ADJUSTMENT] key or [PREVIOUS ADJUST-
    MENT] key to select an item you want to
    adjust.
    "Printer centring adj. (Tray 1)"
    "Printer centring adj. (Tray 2)"
    "Printer centring adj. (Tray 3)"
    "Printer centring adj. (Bypass)"
    "Printer centring adj. (Tray 4)"
    "Printer centring adj. (ADU)"
    "Large size offset (Tray 1)"
    "Small size offset (Tray 1)"
    "8.5 x 5.5 offset (Tray 1)"
    "Large size offset (Tray 2)"
    "Small size offset (Tray 2)"
    "8.5 x 5.5 offset (Tray 2)"
    "Large size offset (Tray 3)"
    "Small size offset (Tray 3)"
    "8.5 x 5.5 offset (Tray 3)"
    "Large size offset (Bypass)"
    "Small size offset (Bypass)"
    "8.5 x 5.5 offset (Bypass)"
    "Large size offset (Tray 4)"
    "Small size offset (Tray 4)"
    "Large size normal paper offset (ADU)"
    "Large size thick paper offset (ADU)"
    "Small size normal paper offset (ADU)"
    "Small size thick paper offset (ADU)"
    "8.5 x 5.5 normal paper offset (ADU)"
    "8.5 x 5.5 thick paper offset (ADU)"

    All of those mentioning "ADU" refer to the duplex.

    ' "But the salesman said . . ." The salesman's an asshole!'
    Mascan42

    'You will always find some Eskimo ready to instruct the Congolese on how to cope with heat waves.'

    Ibid

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    Re: Konica C500 Pro duplex top edge erasing

    Thanks, that's amazing!


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    Re: Konica C500 Pro duplex top edge erasing

    Get a manual. It's well worth the price if you regularly see one or more of these.

    ' "But the salesman said . . ." The salesman's an asshole!'
    Mascan42

    'You will always find some Eskimo ready to instruct the Congolese on how to cope with heat waves.'

    Ibid

  10. #10
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    Re: Konica C500 Pro duplex top edge erasing

    Hi
    Tried that did not help it looks to me like a frame erase problem on oll the copies if you do sky shot, it's not even on all of them but duplex a4 it's v bad
    ps now have a manual


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