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  1. #1
    Senior Tech 100+ Posts
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    Risograph GR 3750

    Risograph GR3750 display error T1 been help thanks in advance.

  2. #2
    Field Supervisor 500+ Posts ntbann's Avatar
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    Re: Risograph GR 3750

    I searched CTN and it looks like it has to do with drum position.

  3. #3
    Riso dude 250+ Posts jermyth's Avatar
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    Re: Risograph GR 3750

    T1, main motor lock. The drum is still at position A after main motor has started or position A sensor doesn't detect the drum after 5 seconds after the main motor has started.
    Solution 1: Turn off machine. Hold reset button (on control panel) while turning machine back on and continue to hold until machine is done starting up.
    Solution 2: Possible bad or dirty sensor A. Clean out sensor.
    Solution 3: Possible broken, bent or missing "flag" for sensor. Try another drum if you have one.
    Solution 4: tie rope to machine and use as a boat anchor and buy a newer machine
    Good luck.

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