Pioneer SX-680 balance issue

[R&B Stereo]

Greetings,
So here’s an issue I have never encountered. The balance pot not functioning. When centered, the sound is crap, and seems like any sound below 1000Hz is cut off. Turn to either left or right and get great stereo sound. I had a hum also so adventured to remove the balance pot and it was broken! Replaced it, hum gone but the very same L/R issue remains! What’s the secret? Clearly not the pot. Thanks

 

[redk9258]

Missing ground around the pot? One speaker out of phase?

 

[KKnight]

Greetings,
So here’s an issue I have never encountered. The balance pot not functioning. When centered, the sound is crap, and seems like any sound below 1000Hz is cut off. Turn to either left or right and get great stereo sound. I had a hum also so adventured to remove the balance pot and it was broken! Replaced it, hum gone but the very same L/R issue remains! What’s the secret? Clearly not the pot. Thanks

First get this ? in the Pioneer section- you'll have better luck.
TRIPLE check that pot again (remove it) and clean it good with DeOxit. If you can ensure its ok, sounds like your DC offset is off and has drifted from spec. Real common on old units that havent been fully recapped and recalibrated. Could be transistors but..