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Author Topic: How common is a PSU failure on a mixing board?  (Read 3929 times)

Scott MacAuley

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Re: How common is a PSU failure on a mixing board?
« Reply #10 on: June 04, 2007, 01:37:57 am »

Stop Freaking out!!!!!!!!!!! Shocked

Console supplies fail......CONSTANTLY. Just like anything else you throw around in your truck, or that gets bounced around in your truck, or gets exposed to varying atmospheres, humidity or just plain turn on and turn off, and lastly AGE, they break.
It's nothing to get too upset over. Supplies should be maintained like anything else. A slightly loose heat sink screw on a rack mount supply can cause mild overheating and eventual failure. The heat sink silicone dries out under the regulators
turning into an insulator allowing heat to build up blowing regulators. Bridge rectifiers simply wear out. Caps get old, start drying out demanding more current and adding hum.

Just to give you an Idea of what supply problems I ran into in last year before I stopped doing repairs, 4 Yamaha PM series supplies, 6 Soundtracs Supplies, 2 Soundtracs Solo's, 2 Allen and Heath supplies, numerous EV processors, Numerous Yamaha PCMs,
Numerous Quadraverbs, TDM crossovers, Klark Teqnique eq's, Biamp Eq's, Samson amps (all refused), the list goes on.
Get the supply fixed, while you are at it go through the console and make sure every thing is tight and clean. If it's old look for oxidized solder joints. If there are numerous problems like various sections not working (an eq here, a send there), you could also have a few bad chips drawing enough current in total to blow a supply. Once the supply is fixed make sure to find out exactly what was wrong with it. If any of it was age related,
have the other supply cleaned up too.
Good Luck. Smile

Added. Many power supplies these days are barely rated for what they are powering so you may already be running on the edge.
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(Brian) Frost

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Re: How common is a PSU failure on a mixing board?
« Reply #11 on: June 04, 2007, 02:44:55 am »

The HP8 has only existed for 2 years.  This is a pretty new board.  Admittedly, I was unsing the onboard power supply, and I am interested infinding out what went wrong since the powercable was hot to the touch... board was working fine before it blew up.
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Frost

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Good is good but not as good as better

Josh Evans

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Re: How common is a PSU failure on a mixing board?
« Reply #12 on: June 04, 2007, 07:18:32 am »


Enough to require the use of a back up power supply.

I have had failures on Allen and Heath, Mackie, Ramsa, Inovason, Midas H3000, DDA, and Yamaha.

Think about it if a channel dies just use another one and continue on with the gig.  However if the power supply dies then ur screwed.

Another thing to think about is all the new consoles that have a mini ATX computer built inside that use a standard off the self power supply.  There is a reason that there are so many market CPU power supplies.

Maybe a good rule of thumb is that is ur on a tour or mixing anything over 2000 seats (have a back up)!!!

I would also suggest having each power supply on different circuits. A good power supply will have indicators displaying if the power is good before cycling the console on. But then you are measuring ur voltage before you throw the switch right?

I also like what Dave Dermont said about not even plugging in the back up until needed. Ill add that to my mental notes for the future.

Im surprised Mark Herman has not replied as he has owned a couple desks in the past.
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Joshua Evans

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Re: How common is a PSU failure on a mixing board?
« Reply #12 on: June 04, 2007, 07:18:32 am »


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