TM  10-3930-638-24&P F-5.   TROUBLESHOOTING   LOGIC [F-6.   ELECTRICAL   SYMBOLS TREE Figure F-1 is a Troubleshooting logic tree. It is designed to Figure  F-2  shows  you  the  basic  electrical  symbols  used  with help you develop a quick logical way of approaching an most  schematics.  They  will  help  you  read  and  understand electrical troubleshooting problem. the  electrical  circuits. F-2