ADA8000 started smoking

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charlievela
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ADA8000 started smoking

Post by charlievela » Sat Mar 14, 2009 8:47 pm

Sooooo.. I was messing around with my a diy subkick i was working on with my ADA8000( which i use for non essential extra channels when I'm tracking drums mostly), and I started noticing that distinct smell of burning plastic. To my horror the smoke appeared to be coming out of my rack. More specifically out of the ADA8000. Immediately i killed the power and unplugged the unit, but I'm pretty sure the damage has been done. I opened it up, and it looks like the MOSFETS might be the culprits....


Anyone else had a similar experience?

jeez... looks like i'm going to have to put a new unit on the dreaded credit card. any suggestions?
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b3groover
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Post by b3groover » Sat Mar 14, 2009 9:57 pm

You can buy mine. :) I ain't using it.
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Rabbit
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Post by Rabbit » Sun Mar 15, 2009 12:53 am

ADA8000 started smoking
With all the data and surgeon general warnings over the years, you'd think this sort of thing wouldn't still be happening...

sorry, too much beer.... :lol:
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RefD
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Post by RefD » Sun Mar 15, 2009 9:42 am

you're certain it wasn't something in the power supply?

ages back, a friend of mine had the bridge rectifier burn up in...was it his Emulator II+HD?

a trip to Radio Shite and some solder fumes and it was back in business.

anyway, might not be so simple a fix on an SMT piece like this.
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Andy Peters
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Re: ADA8000 started smoking

Post by Andy Peters » Sun Mar 15, 2009 1:21 pm

charlievela wrote:Sooooo.. I was messing around with my a diy subkick i was working on with my ADA8000( which i use for non essential extra channels when I'm tracking drums mostly), and I started noticing that distinct smell of burning plastic. To my horror the smoke appeared to be coming out of my rack. More specifically out of the ADA8000. Immediately i killed the power and unplugged the unit, but I'm pretty sure the damage has been done. I opened it up, and it looks like the MOSFETS might be the culprits....


Anyone else had a similar experience?

jeez... looks like i'm going to have to put a new unit on the dreaded credit card. any suggestions?
There are no MOSFETs in an ADA8000.
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casey campbell
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Post by casey campbell » Mon Mar 16, 2009 7:04 am

cold turkey....besides, smoking can cause all kinds of health related issues! :D
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Ryan Silva
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Post by Ryan Silva » Mon Mar 16, 2009 10:40 am

A good rule of thumb with Beheringer is always buy two of everything, for obvious reasons.
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charlievela
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Post by charlievela » Mon Mar 16, 2009 11:22 am

Thanks for the replies, I took some pictures of the offending components. They seem to be labeled IC26 and IC27 I can't really get a good look at their values. Voltage regulators? I'm still a student of electronics. This seems like it might be a great real-world learning exercise. Any advice that might be offered would be great. PS. Since this has turned into a fixing gear issue, maybe it should be moved to the DIY Gear forum.

Once again thank you for your help
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rodabod
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Post by rodabod » Mon Mar 16, 2009 5:41 pm

That'll be the voltage regs which run too hot (pre reg voltage is too high).

Fit new ones with maybe better heatsinks, or add a series dropping resistor to feed them with a decent wattage rating to take on some of the strain.
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@?,*???&?
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Post by @?,*???&? » Mon Mar 16, 2009 8:32 pm

Did you have the obligatory half rack space of air on either side of this unit for ventilation or were you unit-to-unit?

These units RUN HOT. You can fry an egg on mine when its on- which is always.
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charlievela
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Post by charlievela » Mon Mar 16, 2009 8:52 pm

you know, that's probably exactly what it was. I bought this guys a long time ago. It wasn't really an issue till i moved into my new desk. When/if i get this fixed i'll remember to give it room to breathe.
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vikingrecording
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Post by vikingrecording » Tue Mar 17, 2009 8:15 am

v regulators are super cheap, repair that dude! invest the extra buck on better heat sinks!
Way better than pitching it in the trash!
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calaverasgrandes
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Post by calaverasgrandes » Fri Mar 20, 2009 12:24 am

Chuck, why waste time and money repairing a behringer, thats like restoring a pinto.
??????? wrote: "everything sounds best right before it blows up."
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