I have a 3770 that won't pull paper through the machine. The initial pick up of the paper works fine (I have just replaced the first section — tires, etc., too) and everything was working fine for several thousand copies. The first sign something was wrong was that the first sheet (and only the first sheet) after making a new master would not go through, but would "accordion" the sheet. After removing that sheet, everything would work as normal — never even a misfeed. However, now, suddenly, no sheets whatever will go through the machine. There is no "accordion" issue, but the sheets stop after passing past the feed tires with a paper jam error (under the drum). The sheet is not really jammed, but is just laying loose. I'm guessing something with the "interior" feed roller even though it seems to move appropriately. What should I check, clean, remove, etc.?
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