Serial Interface Switches; Function Switch Setting - Lexmark 2390 003 - B/W Dot-matrix Printer Service Manual

Serial Interface Switches

The serial interface has 12 function switches which determine how
the printer receives data from the computer or terminal. Set the
switches according to your particular equipment requirements.

Function Switch Setting

Switches 1 To 4 - Speed:
Define the serial interface speed in bits per second (bps).
Snap-On and Gray Serial Adapters
Switch 1
On
On
On
Off
Off
Off
Off
On
Off
1-8
Switch 2 Switch 3
On Off
Off On
Off Off
On On
On Off
Off On
Off Off
On On
Off Off
Switch 4 Speed (bps)
Off
Off
Off
Off
Off
Off
Off
Off
On
(RS-422 only)
150
300
600
1,200
2,400
4,800
9,600
19,200
38,400