Epson FX-2190 Reference Manual page 27

3. Set the paper release lever to the front push tractor position.
Also set the paper-thickness lever (located under the printer
cover) to the proper position for your paper's thickness. See
"Adjusting the Paper-Thickness Lever" on page 15 for
instructions.
4. Release the left and right sprockets by pushing the blue
sprocket lock levers backward.
Paper Handling
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