Peavey 3120 Channel Switching and low volume issue

[stereomonostereo]

K5 in this amp is an Omron G6A-274P-ST. The rest of the relays are the D2SY-S-212L. I'm noticing that the junction of R49 and R50 reads to ground, as well as the drain of Q2 J174. Q2 has been replaced, but the drain leg is still reading to ground. I've tested CR5 and CR8 on my meter set to diode and they read 6.97 one way and Open the other way. It seems something is letting the signal go to ground?

[52 Bill]

I'm noticing that the junction of R49 and R50 reads to ground, as well as the drain of Q2 J174. Q2 has been replaced, but the drain leg is still reading to ground.

What dc voltage is at the gate of Q2? If there is not enough voltage there, the fet will not turn off and unground the junction od R49 and R50.

[stereomonostereo]

It appears that the MAC97, which is part of the transient clamp, was bad. Being a P-Chan, J174 wasn't taking the drain off ground without the proper voltage if I'm looking at this right.

[tedmich]

J174/Q7 on the 5150 goes bad frequently and Enzo has directed their replacement multiple times, hope it does the trick!