Serial Port Service Check - Lexmark 522n - C Color Laser Printer Service Manual

4520-xxx

Serial Port Service Check

Run the .
"Serial Wrap Test" on page 3-13
Note: The Serial Wrap Test is designed to check the serial port
hardware by using a wrap plug (P/N 1329048) and invoking the
Serial Post Diagnostic Test. The test helps isolate the printer from
the serial cable and host. The test provides failure information on the
display for approximately three seconds. If the test indicates a
problem, replace the controller board.
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Diagnostic Information