#1 Highlight the marks on the feed table so that they can be seen better.
#2 Place the sheet detector into the holes.
#3 Place a piece of paper in the fold tray and align the sheet detector with the lines
#4 raise sheet detector and rotate the roller until the sheet detector is between the holes
#5 Place two sheets of paper between sheet detector and roller, but not touching the rubber on the end of the roller.
#6 drop the sheet detector on the paper and tighten the sheet detector . (Do not apply pressure to the sheet detector when you tighten it.) #7 Insure that the paper guides on the feed tray are not touching the paper. There should be a slight gap between the paper and the guides. #8 Factory setting on the air is 20, although it may be greater as the machine gets older.