Petsafe underground fence model RF-125.
It quit working, found the resistor shown (upper left) is burned, open. No designator, all other are R1, R2, etc. I need to know the value, one red stripe visible, others burned off. I have not found schematics online that show this (there are some that show everything else except SD2 and R?). It's connected to SD2, the the output connector. SD2 is a transistor of some sort (unreadable) with the center leg (collector?) cut and folded back. It maybe is being used as a diode(s). It beeps out as PNP.