Question about Behringer POWERED MIXER, 20 CH, 400 WTS AMPLIFIER => Model PMX5000 Car Audio Amplifier
PMH1000 TRIPS THE HOUSE RCD FOR EARTH LEAKAGE WHEN UNIT IS TURNED ON. TYPICALLY IT WILL TRIP 1 IN 3 TURN ONS, NO MATTER WHERE IT IS PLUGGED IN. I HAVEHAS TESTED THE UNIT IN OTHER HOUSES WITH SIMILAR RESULTS?
ANY MANUALS OR SCHEMATICS SHOWING THE PSU?
THIS MAY BE NORMAL. The starting transients can trip RCD's or GFCI's as we know them due to high frequency components that are not balanced due to capacitive coupling. IF you have the inputs connected to OTHER devices such as effects modules that also have line power to them there may be a ground loop.
ALWAYS connect any interconnected device to the same power source for equipment safety. Behringer is stingy on schematics.
You MIGHT try using a decent line filter to supply the unit. It has been a while since I repaired my 1000, but I don't recall any specific thing in the design to unbalance the current, HOWEVER the power does go through a thermal switch on the heat sink for the power transistors and the wiring CAN be dressed so that it might couple to the other internal wiring AND the safety ground. Suggest you try a small lamp in series with the safety ground (third wire) to see if you get any appreciable current there during startup. Make an adapter... DO NOT cut into your power cable to do this.
Posted on Jul 27, 2009
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Posted on Jan 02, 2017
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