OK. Ideally out of circuit. TR703,707,712 and 713.
Consider replacing these electrolytics- C713,714,717 through 721.
Also check the forward and reverse resistance of D715 zener diode.
Too bad we never met. I was with the 3207 (?) Vehicle Maintenance Squadron. that was so long ago. The squadron number might not be right; my memory is fading....
Man I loved to watch those F-15s tear up the sky!
The reason I joined the AF was just to be near those awesome planes!
Sorry I've been busy lately. I have checked transistors 703 and 707 and they checked out ok. But no matter how careful I am everytime I take out a transistor traces lift.:sigh: