Question about Behringer XENYX 2442FX Mixer

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Channel 1 makes a pulseating click and NO sound through it . All other channels are fine!!!!!!!!

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  • Ronald Lankford Sr Sep 23, 2013

    Don't know how it happened but the mixer is a MX2642A.
    Channel One has a clicking sound evenly spaced. hooking a cord & guitar to it you get no sound just the click. All other channels are fine. the problem seems to be in the channel one only section. It's like a drum metronome click . I am somewhat familiar with working on electronic but of course they have changed much over the yrs.
    Maybe a cold solder joint or????? Just trying to find what to look for. Still have 15 channels left but prefer all 16....



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Operational amplifier circuit named 4580 is the issue as with most of mixing boards, each channel has its own operational ic's and one way to know which one is defective is simply touch every one on the board, inside of course, of the non-working channel, check for excessive heat and if you find one pretty hot compared to other you just find your bad component, you will recognize what type of ic im talking about, is a 8-pin smd ic where the pin 4 should have -15v and pin8 should have +15V, no other pin should have any voltage and this is another way to test an opamp, with a dmm in dc volts referenced to ground, chassis ground, let me know if you need further assistance.

Posted on Nov 05, 2013


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