TU 717 Buzzing.

[hughman61]

Put the system in Mono; Swing the balance control from L to R. & report back. Is 1 channel down on all inputs? If so the problem lies elsewhere.

The AU 717 does not have a mono setting.

 

[Lesterbest]

Do you have a mono source in your software? Try an AM talk station. Then do the balance L & R & report back.

 

[Lesterbest]

Do you have a mono source in either your software or hardware? Do your tuner have a mono mode?

 

[Lesterbest]

Sorry about the double post.

 

[hughman61]

No mono source in either software or hardware. I'll try an AM station. I did roll the balance left & right and the right channel on both A/B is super low and there's static. What are you suggesting?And is this just a coincidence? A 30 + year amp just gonna have issues.

 

[cnolanh]

For what it's worth, the TU-717 does have an FM mono mode (FM Auto allows stereo when there's a signal available; FM Mono forces mono). You might tune in a stereo station, then switch to mono for testing.

 

[hughman61]

For what it's worth, the TU-717 does have an FM mono mode (FM Auto allows stereo when there's a signal available; FM Mono forces mono). You might tune in a stereo station, then switch to mono for testing.

I'll give it a try when I get home.

 

[Punker X]

On the back side near the pre-out - amp in jacks there is a switch. I would wiggle it, these connected/disconnected switches are notorious for causing this very issue.

 

[hughman61]

On the back side near the pre-out - amp in jacks there is a switch. I would wiggle it, these connected/disconnected switches are notorious for causing this very issue.

Holy crap!! That was it.

I believe the buzzing was because I had a rheostat lamp plugged into the same outlet. Not a ground loop issue. Man thanks for such a simple fix. Now why is that integrated/ pre-out switch doing that?? Just a bad design.