Hello everyone! :-)
An acquaintance of mine works as a DJ in his spare time and brought me a defective QSC active loudspeaker (Model: K10.2) for repair.
Error description: The device could not be switched on (after he lent it to another DJ).
A visual inspection revealed an obviously blown fuse (F41) and a cracked thermistor (R41) on the mains filter board. A closer look at the amplifier board revealed two defective power MOSFETS (Q13, Q14) and other defective components on the +12VLOW rail.
After replacing all the obviously defective components, the...
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