Star Micronics TSP2000 Series User Manual page 16

(4) Make sure that the paper is positioned straight, then close the printer cover
gently.
Note 1: Make sure that the paper is positioned straight. If the printer cover
is closed with the paper skewed as shown below, a paper jam may
result.
Paper
Note 2: Lock the printer cover by pressing on the center of the cover
(indicated by an arrow in the figure below). If any part of the cover
other than the center is pressed, the cover may not be locked
properly. This may sometimes disables printing.
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