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Behringer djx700 mixer volume comes from left side only master volume looks like it was gained to max and blown the pre amp i am pressuming how can i fix it and is it the pre amp adjusts master and crackles loudly and spikes to red by just touching master volume

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Hi danjan

Sounds like you have a faulty master level control, or dry solder joints connecting it. There are a few things that you can do to sure this. .

  1. Pop the unit apart so you can get access to the control solder side of the printed Circuit Board.
  2. First, visually check the soldering to the control where it connects to the board,
  3. If soldering to it looks ok, then try a squirt of CRC 2-26 contact cleaner lubricant into the internals of the master control.
  4. Before replacing it you need to be sure that the pot is faulty is to look for audio in the center wiper of connection of the control. You will need some test gear to pursue this level of diagnosis
  5. If you have audio in and out from the pot, then there is a failure after the pot in the summing amplifier stages. No audio into the pot points to the stage prior to it.
If you have no experience with this sort of repair work to high density surface mount circuitry, then I strongly urge you get an audio tech to have a look at it for you;:) This sort of repair expect to set you set you back $40-80 across my workbench, depending on what needed to be done. Good Luck

regards
robotek

Posted on Oct 21, 2008

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