Question about M-Audio Studiophile BX5 Main / Stereo Speaker

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M-Audio BX5 - No Power

I have checked the fuse and capacitors - they don't look like they have blown, I have also changed the power supply cable and plug socket, still no power.

I have no idea what to do, suggestions, other than throwing a tantrum and binning it?

M-Audio themselves are likely not to help as the product is old.

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I have the exact same problem, good fuse and plug, but no power. How do I trace the voltage and check the power?

Posted on Aug 22, 2009

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Don't bin! This should be a simple fault to rectify.

Fault finding technique as follows:
Trace mains voltage up to main transformer - there could be a standby transformer with relay in parallel. Check mains voltage all the way until it stops. If you have voltage up to main transformer, check that you have low voltage at the other end - if not main transformer at fault. If you don't have, then check to see if you do have a standby transformer - much smaller and usually on small circuit board near where power comes in to speakers. They are notorious for blowing on many audio systems as they are constantly connected to mains unlike most of the other components - power spikes kill them in particular.

Posted on Jul 29, 2009


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