Did you previously have a jam? It is possible that a small piece of paper is stuck in the paper path. The best option is to floss the paper path. You do this by taking either some thin stiff cardboard (cereal box) or mylar about 1-2 inches wide and forcing it through the paper path in the direction of travel to clear any hidden jams. Only do this in the normal direction of travel to avoid damaging any flags. NEVER push the cardboard in the opposite direction as you can damage flags.
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