Question about DBX DriveRack 480 Processing Unit Home Equalizer

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DBX DriveRack PA power failure

My Little brother plugged my driverack PA unit into a 240V power supply (UK) yet it was designed for 120V. since then, it zapped and doesn't work anymore. The unit has no fuse. any ideas on which parts could have a problem and how to go about it?

Thanks
Julius

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  • Anonymous Mar 05, 2008

    Recently we purchased a brand new DBX Driverack pa for our group and for the studio also. When I took the unit out of the box and installed it as recommended without the amps hooked or powered up, the LED would light up but no information would display on the screen. This unit is brand new and the factory manual start up will not work either. I have experience the sound of these units in the past, but what a disappointment from the factory. Any technical advise before I send this unit back to DBX.

    Wm.

  • Anonymous Mar 18, 2014

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Repair the transformers,,,using a digital voltmeter when both transfrormer are good the measure like 56 ohms, if one is good and the other is bad is gonna measure like 120 ohms , if both are damage it will measure nothing, all this with the switch in its on stage.

If you dont find anyone that can repair the transformers buy them.

Posted on Jan 12, 2009

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There is a 500 ma fuse on the internal circuit board at the power supply...check it...

Posted on Sep 28, 2012

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It's not a DBX problem, it's a brother problem.

Posted on Mar 04, 2008

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You cannot say which part of the system has zapped unless you open it and have a go through the internal structure... even with a circuit idea it is hard to have a clue on which part has zapped...

Posted on Jan 31, 2008

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Posted on Jan 02, 2017

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We have a dbx Driverack PA unit with a Crown CDi1000 amp in our church. Recently, we starting having problems with the output to our main speakers dropping out. We found (by accident) that if we unplugged...


Check the speaker wires coming out of your amp. Chances are you have a problem with a speaker wire and this is just a coincidence. I say this because the same thing happened to me during a live show and I about had a heart attack. We lost the front of house for about 15 minutes while I tried to troubleshoot the Driverack, the board, and everything but the speakers and speaker wires. The cables were a recent purchase and were premium grade with light wear so I mistakenly ruled them out. It was intermittant so it took me a while to figure out. Now I understand that that's the weakest link in the chain and from now on I start there and work backward through the chain (that is, if all sound is cutting out).

Do you use banana plugs (two metal pegs sticking out of a plastic rectagle) coming out of the back of your amp? There are little screws inside the holes on the back of the banana plugs. Those can vibrate loose, especially if they're just factory tight. Get a little standard screwdriver and tighten them down. That will probably solve your problem.

Okay, wait a minute -- could be one more thing. You mention that the loud popping can be heard. Do you have any gates turned on? Most compressors have gates. Check your compressors to see if you have your gates turned up too high. A gate set too high would allow the loud pop to go through to the PA but would cut off everything low to mid-volume.

I guess you can see that I don't think it's a problem with the Driverack. I don't work for dbx or anything, I just think these other things are far more likely than a problem with the unit.


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