I have two 3550's with the same problem and I really need some suggestions. The problem happens only with multiple copies, single or double sided, only cassette one. The bypass and the extra tray two are fine. It happens every four or five copies jam 501. There's a piece of paper about half fed from the tray and one part way through the fuser. I've replaced the feed, pick up and separation rollers, the entire separation roller assembly because it was the old style with the long arms, and also the paper feed drive assembly which contains the feed clutch. I think I'm going to order the entire cassette but if that doesn't do it I'm stuck. Any help would be great. Thanks, Jim
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