Epson AcuLaser C1000 Setup Manual page 26

4. Secure by fastening the retaining screws.
To confirm that the interface card is installed correctly, print a
status sheet. If the AUX interface is not listed on the status sheet,
try reinstalling the card and making sure that the card is securely
fastened to the socket on the printer. For instructions on how to
print a status sheet, see "Testing the printer" on page 31.
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Installing the Options