I have had this printer a part for a paper feed problem. It will pull 11x17 paper, but when the paper is switched to Letter. The paper cannot engage the paper. Is the rer of the paper tray where the lift occurs done by some sort of cam that is moved with the Sptoon/Service Station initializing for print? Or is there a piece of plastic that flexes onder the lift tray that is broken-off? Without a servie manual, cannot diagnoise this....any suggestions other than a source for buying a Service manual? Thanks again...Steve