Serial Interface Adapter Print Test - Lexmark 2390 003 - B/W Dot-matrix Printer Service Manual

Serial Interface Adapter Print Test

The serial interface adapter has a switch that enables a test of the
connection between the serial interface adapter and the printer main
logic board. This generates a short test print containing the serial
interface adapter code level and switch settings, and the printer
character set.
To run the serial interface test print:
1. Turn the printer off.
2. Turn on serial interface Switch 10.
3. Turn the printer on.
If the printer does not generate a printout, there is a problem with the
serial interface adapter or its connection to the printer. Check the
switch settings and be sure the serial interface adapter is correctly
installed.
When the test is complete, turn off Switch 10.
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