Epson FX-870 User Manual page 29

the Printer
Testing
3. Move the left edge guide until it locks in place next to the arrow
guide mark. Then adjust the right edge guide to match the width
of your paper.
CAUTION: Use paper that is at least 210 mm (8.27 inches)
wide for the standard-width carriage or 360 mm (14
4. Insert a sheet of paper between the edge guides until it meets
resistance. After about two seconds, the printer loads the paper
automatically and starts the self test.
1-12 Setting Up the Printer