have a Sharp MX5070 that while idle will go into a jam.The jam code is FIN_ERR.which as sharp says it is a communication jam.I have replaced the Finisher board and the PCU and did firmware.You can open the left door and close it and it resets.Sometimes if you send a print job it will sit and sit till you open the right door and close it.I even checked the jam sensors took a picture of what is normal as sensor are on of off and compaired to what I took.It is not a sensor jam,meaning no difference in sensor normal or when it shows a jam.Sharp is no help on this.we are a dealer,just wanted to see if anyone has this issue with FIN_ERR.thanks
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