I have replaced various newly install components (like the Cap's, Diodes and LM388T's) with other new components thinking maybe a new component might have been bad but so far. I'm thinking the +17 on the bad PS drops out once a load is put on it but I don't have the knowledge to understand what component might be causing the problem. I have two MX9000 mixers with one good PS so I am able connect the good PS to either mixer and the +17 is present. I have also checked to be certain there is not a loose and intermittent connection at the pin-out. The PS shows correct voltages of -17, +17, +48, +12 & +5 at the PS pin- out but when connected to the mixer, the +17 is absent. I replaced all three LM350's with LM388T's, as well as replaced all of the Cap, Diodes, resistors and the LM317 and LM7818 power transistors. ![]() ![]() I have a Behringer MX9000 400 Watt Power Supply which did what most of them do.
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