Labels:bird | earth | grass | microwave | plant | road | sidewalk | sky | windowpane OCR: Appendix A PE Card Modification Instructions TI-RS232 Card Modification TI-RS232 Card Modification The TI-RS232 Card requires that only 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 expan sion chassis. This is the 7812 voltage regulator Jumper between pin I and 3 PE12 User's Manual Doc1.0 20