Epson 1010 User Manual page 192

With an optional interface, the printer does not operate properly.
The printer does not print or the printout is not what you expected.
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Check that the interface board is correctly inserted into the
connector on the main board.
Check the specifications to make sure that you can use the
interface with this printer.
Make sure that the cable matches the interface specifications.
Check that the DIP switches or jumpers on the interface board
are set correctly. Also, make sure that the computer and interface
settings match.
Troubleshooting
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