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  1. #1
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    MP C 5503 with false tray full message

    I have an MP C 5503 with a SR 3140 finisher that occasionally tells us that the shift tray is full. This message is false, no paper present. After spending some time checking the SR 3140 sensors, motors, and such, I swapped the finisher for another one. The second SR 3140 gives the same thing. Now realizing I may not have a finisher problem, I have updated firmware for the 5503. Still get the shift tray full message. I have unplugged finisher so customer can use machine with just the minimum of frustration. Please, any help will be welcome.

  2. #2
    How'd ya manage that? 500+ Posts zed255's Avatar
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    Re: MP C 5503 with false tray full message

    On the rear shift tray drive rack there is a metal bracket that interfaces with the optical sensors to tell the unit where the shit tray is, elevation wise. Add a little tape to the bottom edge such that the effective length of the flag is longer by say 6mm or 1/4". Seen this many times and the little tape trick always seems to work. I wish I had a pic to post.
    Zed
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    Think of your three closest friends...
    If they seem okay, then You're The One.

  3. #3
    Senior Tech 250+ Posts FrohnB's Avatar
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    Re: MP C 5503 with false tray full message

    Quote Originally Posted by zed255 View Post
    On the rear shift tray drive rack there is a metal bracket that interfaces with the optical sensors to tell the unit where the shit tray is, elevation wise. Add a little tape to the bottom edge such that the effective length of the flag is longer by say 6mm or 1/4". Seen this many times and the little tape trick always seems to work. I wish I had a pic to post.

    +1 on this. Have seen it a few times. Actually, I do believe I found this little tidbit on this site years ago, and it saved me from a major headache/ unnecessary replacement . This site is the Best.

  4. #4
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    MP C 5503 with false tray full message

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    Re: MP C 5503 with false tray full message

    it happens when the finisher touches a wall or other things, then the self-diagnosis remains under stress, or it has gone out of phase during the movement, there is a bracket that deforms and must be restored or replaced

  5. #5
    Retired 5,000+ Posts slimslob's Avatar
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    Re: MP C 5503 with false tray full message

    Quote Originally Posted by zed255 View Post
    On the rear shift tray drive rack there is a metal bracket that interfaces with the optical sensors to tell the unit where the shit tray is, elevation wise. Add a little tape to the bottom edge such that the effective length of the flag is longer by say 6mm or 1/4". Seen this many times and the little tape trick always seems to work. I wish I had a pic to post.
    I have not seen this but I have seen ceiling lights shining down on the proof tray causing it to report as full. I would usually place my clipboard over the tray so that I could run reports.

  6. #6
    How'd ya manage that? 500+ Posts zed255's Avatar
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    Re: MP C 5503 with false tray full message

    Slim, I think GUIBOSS is correct on the root cause of the issue. The issue I find is once the shift tray is even out of whack just the slightest this 'tray full' problem happens. Seems no matter what you do it will never reliably function afterwards. Adding the tape or similar works well and greatly increases the tolerance for slight fitment issues of the shift tray assembly.

    I have seen what you mention too, both with proof trays and size selection issues on DFs.
    Zed
    One out of four people is mentally unbalanced.
    Think of your three closest friends...
    If they seem okay, then You're The One.

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