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  1. #1
    Junior Member
    Join Date
    Mar 2016
    Rep Power

    GR 3750 T3 call service

    Got a call for a Risograph GR 3750 T3 call for service in display. Anybody know what this problem is? 20 plus year old machine. Also does anyone know of a source for refurbished duplicators.

  2. #2
    Senior Tech 250+ Posts 20gaugeO/U's Avatar
    Join Date
    Feb 2009
    Rep Power

    Re: GR 3750 T3 call service

    Does it make a popping sound 4 or 5 times before it gives the T-3? If so there is a crack in the clamp plate motor assembly. With it out of the machine you can bend it back down into position and put a bead of solder weld in the angled corner and it will be better than new.

    Or look at Riso GR3770 T3 Error


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