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

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RDF

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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
 
Yes that’s the one, and yes I suspect it needs replaced.
 
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