Epson EPL-N1600 Reference Manual page 55

5. Fan a stack of paper (up to 500 sheets) to prevent the sheets
from sticking together, and tap the edge of the stack on a firm
surface to line up the edges of the paper.
6. Insert the stack into the cassette, lining it up with the left side
of the cassette. Make sure that all the paper is under the metal
retaining clip and the plastic caps on the end guides. If you
load the printer with too much paper, it may cause paper jams.
7. Slide the side guide to the left, so it just touches the edge of
the stack of paper.
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