Labels:bird | door | road | sky | window box | windowpane OCR: Appendir A-PE Card Modification Instructions CORCOMP RS232 Card Modification CORCOMP RS232 Card Modification The Corcomp RS232 card requires that one 7812 voltage regulator be jumpered. See picture below for location. After making the modification, be sure to label the card for use in only the PE/2 type expansion chassis. This is the 7812 voltage regulator. Jumper belween pins I and 3. PE12 User's Manual Doc 1.0