I have an AU 717 that was re capped a while back. It's developed a pronounce 60 cycle hum at moderate to high volume when in phono mode with nothing plugged into the phono inputs. If you feed a signal into either aux or tuner, it bleeds over when in phono mode. Putting shorting plugs into the phono inputs, eliminates the hum and bleedover. The hum is not present at minimum volume and gets more pronounced as you increase volume,
It works normally and sounds great otherwise. I've gone over the input and EQ boards with a fine tooth comb checking grounds and don't see cold solder joints or cracked traces.
Anyone run into this?
- Pete
It works normally and sounds great otherwise. I've gone over the input and EQ boards with a fine tooth comb checking grounds and don't see cold solder joints or cracked traces.
Anyone run into this?
- Pete