Lexmark 4039-1XX - Manual (Page 63)

Diagnostic Aids 49
4039-1XX
Switch 8 – Buffer Size: Switch 8 allows the adapter buffer size to
be limited, to minimize the amount of data in the buffer at any time.
Switch 9 – Protocol: Switch 9 selects the type of protocol.
Switch 10 - Print Test: Switch 10 selects the print test for the serial
interface card. This tests the connection between the serial interface
unit and the printer. The printout contains the serial interface unit
code level and switch settings, and the printer character set.
Note: For the serial print test to work [Advanced Status] (found
under the [PARALLEL SETUP] menu) must be set to [Off].
To run the serial interface test print:
1. Turn the printer power off.
2. Set serial interface Switch 10 [On].
3. Turn the printer power on.
If the printer does not generate a printout, there is a problem with the
serial interface card or its connection to the printer. Check the switch
settings and ensure that the serial interface unit is correctly installed.
When the test is complete, reset Switch 10 to [Off].
8 Buffer Size
Off Normal
On Minimum
9 Protocol
Off DTR pacing (RS232 only)
On XON/XOFF
10 Print Test
Off Normal Mode
On Test mode