How to select the RS-422A (Apple) or RS-232C (IBM) Serial
Interface (For HL-1250 Only)
This section is only for printer models which have had the serial interface installed.
Be sure to select the serial interface type to match your computer as follows:
For Apple Macintosh computers: you should not have to change any settings
because the Apple (RS-422A) setting is factory selected (default).
For IBM compatible PCs you should move the switch to the IBM (RS-232C)
If you are using an Apple Macintosh on the RS-422A port and an IBM
compatible PC on the parallel port, it is not necessary to make any changes to the
If necessary, select the interface type as follows:
Make sure that the printer is in the off-line state.
Select the RS-422A(Apple) or RS-232C(IBM) interface by changing the serial
interface slide switch to the right to select the IBM(RS-232C) interface or to the left
to select the Apple(RS-422A) interface.
Fig. 2-2 Selecting the RS-422A (Apple) or RS-232C (IBM) Serial Interface