Yamaha Q2031A Whistles
Dear All
I bought a Yamaha Q2031A second hand. When I turn it on, it sometimes emits a high frequency tone, I'd guess about 10 kHz from the left channel (Channel A). This is quite audible and at a constant amplitude regardless of the amplitude of the audio passing through the channel. After a while, maybe 20 minutes, the HF signal disappears. I assume this is something to do with a faulty component warning up.
When I first bought it, the unit did another a similar thing but louder also on the left channel, but only when I raised the 20 kHz fader, and possibly the possibly the 16 kHz and 12.5 kHz faders as well. I can't remember exactly, as this was about a year ago. To fix this, using my limited knowledge, I carefully resoldered the component joints to the board for the components that were obviously related to these faders, and that seemed to fix that problem.
I would be really grateful if anyone could suggest anything I might try to resolve the ongoing HF frequency when the unit is running cold.
Best wishes
Chris
I bought a Yamaha Q2031A second hand. When I turn it on, it sometimes emits a high frequency tone, I'd guess about 10 kHz from the left channel (Channel A). This is quite audible and at a constant amplitude regardless of the amplitude of the audio passing through the channel. After a while, maybe 20 minutes, the HF signal disappears. I assume this is something to do with a faulty component warning up.
When I first bought it, the unit did another a similar thing but louder also on the left channel, but only when I raised the 20 kHz fader, and possibly the possibly the 16 kHz and 12.5 kHz faders as well. I can't remember exactly, as this was about a year ago. To fix this, using my limited knowledge, I carefully resoldered the component joints to the board for the components that were obviously related to these faders, and that seemed to fix that problem.
I would be really grateful if anyone could suggest anything I might try to resolve the ongoing HF frequency when the unit is running cold.
Best wishes
Chris