The reason it buzzed is that the bias drifted and it was set so high that it made the transformer audibly buzz. This is fairly common. You need a voltmeter, a plastic screwdriver and instructions to adjust the bias (with the case open). There are high-voltages in there, so only attempt this if you are skilled in technicians work.
adjusting the bias on an amp YBA
I have an older YBA Integre Single Transform. It must be 10 years old. About 3 years ago it developed a hum/buzz in one channel that progressively turned into distortion. I thought it was hosed. I sent it in and they said "we adjusted the bias" and sent it back. Now it works perfectly.
I had assumed that something major was wrong (like a cap or something going bad). I don't want to look a gift horse in the mouth but what exactly is "adjusting the bias" and how might it have solved my problem? Are there some screws or something one would turn? Is it a user serviceable adjustment?
Thanks in advance.
I had assumed that something major was wrong (like a cap or something going bad). I don't want to look a gift horse in the mouth but what exactly is "adjusting the bias" and how might it have solved my problem? Are there some screws or something one would turn? Is it a user serviceable adjustment?
Thanks in advance.