POSIFLEX Business Machines PP3000 - Manual (Page 26)

CIRCUITRY LAYOUT & CONNECTORS
Fig. 17 Board layout
CN1 : Reserved
CN2 : Control panel connector
This CN2 connector connects the control panel board through cable CCBLA-
189.
CN3 : Power switch connector
This CN3 is connected to cable CCBLA-188 to connect to the printer power
switch.
CN4 : Serial interface connector
This connector is used to connect the host computer by RS-232C or RS-422A.
The MAX232A has to be installed in U3 to use RS-232 interface and MC3451
PP3000 Series User’s Manual 4 - 2