Tascam 388. Low volume on right stereo L/R buss.


New member
This appears to be a common problem from my research on this forum but I figured I'd begin a new thread. When I have the red L/R buttons engaged, the right side is very muffled yet the signal comes through clearly with MONO engaged or monitoring. From my studies, it appears that a certain IC needs replacing. It's supposedly the 4069 hex inverter IC U104 on the BUSS B PCB.

Would this be the correct chip?

And could anyone help me troubleshoot? I'd be very grateful. I love this machine already but I want it to be functioning to it's fullest potential. Thanks all