I have a 920 that do a large amount of A3 booklets through there fs-604. the jams are intermittent and follow no pattern. I have tried the special acho firmwear fited all rollers and bearings in the feed path. The jam seems to curl front edge as it enters the stacker unit and fowls going into the guide.Any ideas would be greatful as i am at a loss to what may be causing this jam?
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