I am going to a 4570 canon tomorrow and this copier is jamming off and on in the fuser unit(wrinkles or creases)its been doing it for awhile.A few techs have been there and cannot seem to figure it out.They have replaced the fuser unit,fuser drive motor.I do not have the jam histroy.I 've had several problems with the right door on this model.Looking for a little help.Thanks
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