Question about Behringer Sx2442fx Eurodesk 24channel Mixer New

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I have a Behringer SL2442FX-Pro and while the mixer itself still works fine and the digital effects controls and displays all appear normal, the actual effects are not functioning. When I choose an effect, what I actually get is a slowly pulsating noise. The only effect that seems to function in-spite of the noise is the 1 kHz test tone. Of course, when I turn all the effects level pots down I'm back to a perfectly normally functioning mixer board. Has anyone seen this problem before and does it have a common culprit? I should tell you that I'm an electronic technician myself, though mixer boards are not my specialty and I don't have a schematic. So, you can get pretty technical with me and I'll understand what you're talking about. Thanks!

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First thing to check is the power supply voltages. I have seen a Behringer effect module that had low 5 volts and it continually reset itself.

Schematics: http://elektrotanya.com/behringer_sl2442.pdf/download.html

Typical Behringer mixer should have same DSP as yours and similar or identical power supply

http://elektrotanya.com/behringer_ub1204fx_pro.pdf/download.html

Posted on Dec 30, 2010

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