[Yaesu] PB1315a board

[Ed and Matthia Keyes]

Hello. I have a problem with my FT101e.The first thing is the mic gain control froze up,but since it froze up in the position thatI keep it in(2) and the rig seemed to operate ok, I left it as that. Today as I was warming it up,the tubes began to glow real hot and smoke was coming from around the pb 1315a board. So I shut it down and pulled the relay and the boards for inspection. It seems upon the sniff test that the pb1315a board is the one that got cooked. In my service manual,the audio gain is pin #19 on the board. Am I correct in assuming that the frozen mic gain controll is the cause of this problem with the board. And would it also cause the tubes to heat up insuch a fashion? Thanks Ed KB1HVS