Oki 390/391 Handbook page 128

ML390/391 Turbo Printer Handbook
3. By inserting board to the far end, it is
Board
Lock piece
4. Connect suitable interface cable (must
Important!
have a parallel cable connected to the
printer when you're using the serial inter-
face. You can switch to the parallel inter-
face without removing the serial board, but
only one cable can be attached at a time.
When the serial interface is installed, the
"Serial I/F" portion of the Menu will be-
come active (see page 71).
locked by the lock piece inside.
be purchased separately) to printer con-
nector and to serial port of your com-
puter. Be sure to tighten screws on both
ends of cable to keep it in place.
Make sure that you do not
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