I changed the three jfts just in case no result. This morning I removed them by bridging their sides and three in m1 and M2. I also cut the three loop cables... I ultimately made the FX loop mod and it didn't work either. Again to the mess: I cleaned all the FX loop pots and FX loop assignment...
I'll test the signal out another amplifier. Thank you, I will continue with this issue since I have not found an answer anywhere and I have read the problem of others, but no one has the answer to the problem.
Hi my friends! My dual has a problem with fx loop. When fx loop is active SOLO and OUTPUT doesn't work properly, sounds very low. :( in bypass all channel master works and the volume is perfect. I thought was V4 but isn't.