Question about Yamaha DSP-A1 Receiver

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Pop from speakers when using dolby digital mode, works fine when not using any processing mode

I have a Yamaha DSP-A1 that I bought new in 1998. I've had it hooked up to various DVD players over the last 10 years and it's always worked fine. Recently, when I'm watching a DVD, and if I select one of the processing modes, like Dolby Digital, or Concert Hall, I'll get a steady 'pop' out of the speakers. I have 2 front main speakers and a center channel speaker hooked up, all PSB brand, all the same ones this has always had connected. Do you have any advice on solving this? thanks Dale

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Over 10 years old? Could be bad capacitors... if you have the expertise, you can try taking it apart and checking them with capacitance and ESR (equivalent series resistance) meters. Otherwise, you can try to see if any capacitors are exhibiting any "bowing" or leaking; if the top of the capacitor is bowed or puffed out - even slightly - or if there is a brown or white residue around the base of the capacitor, you can guarantee the capacitor is bad. Note that not all bad capacitors exhibit these physical attributes... but you can be sure a good capacitor won't.

If all of this sounds too complex, your only recourse will be to take it to a reputable electronics service shop.

Posted on Oct 31, 2009

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