Panasonic KX-F3100 - Manual (Page 203)

Adjusting the feed pressure
If misfeeding of documents, such a multiple feed trouble or no feed trouble, occurs frequently,
try to adjust the feed pressure in the document feeder unit by proceeding as follows:
1 Open the upper cover by pushing the upper cover
open button.
2 Shift the position of the lever on the document
feeder unit by using an instrument with a pointed
end, like a clip or ball-point pen.
Position 1: The case of no feed trouble
Position 2: Standard position
Position 3: The case of multiple feed trouble
3 Close the upper cover carefully by pushing down the
center of the cover until the cover locks into position.
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