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Speakers buzz loudly unable to hear radio, why?
THANKS otk03.
Took it apart - unable to locate any leaking or domed looking capacitors. Everything looks OK to me (?), though a bit dusty from 20+ years of use. Took some pics, not very tech savvy though, so... You'll notice the board looks a bit different, if that matters. Does anything stand out?
Any thoughts?
THANK YOU -- GREATLY appreciate your help.
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Could be a multitude of reasons, but a failed electrolytic capacitor is maybe the likeliest. See https://therestartproject.org/wiki/Basic... for an indication of how to recognise it.
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@fbd use this guide Bose Wave Radio AWR1-1W Screen Replacement to get into your Bose Radio and then check the board for leaking or domed looking capacitors. If you can, post some images of your boards with your question. Use this guide Bose Wave Radio AWR1-1W Screen Replacement for that. It will allow us to see what you see.
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It’s the volume control chip. You can check the -ve voltage from the regulator and that’s will be off. The chip is not made anymore but you can risk eBay or Ali express
@jamesmacla17319 do you know by any chance what kind of IC this is? We would need to know this to try and find replacements.
Yeah in my aw1r1 it’s the tc9213p.
You can tell id it’s bad as it gets very hot. The -ve supply rail drops and there a very loud buzz in the speakers.
So I got one online and it worked for a while then failed. So I’m not use if it was a fake chip or another error in the circuit. The voltages seemed fine when it was taken out so I’m just not sure.
As a ps. You need to check your circuit against the schematic as some have a transistor in the -ve voltage rail circuit. Mine did not. Someone online had that fail too
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