SATO FX3-LX Operator's Manual page 213

3. Press the cover open button (2) to open the top cover (3).
4. Pull out the fan-fold media inserted from the back of the printer.
5. Move the media guide (5) while pressing the slide lever (4), and adjust to the media
width.
6. Close the top cover.
Push both ends of the top cover, and close it firmly until it clicks.
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