I just received a about 10 of these amplifier all look new externally. This one reads a dead short across the power supply, pulled board and replaced the D1 but noticed that Q12 is blown as well.
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Remove the ps mosfets and drive looks excellent.
Are you showing both gate drives from the PSU controller in phase? That would be a problem.
Are you showing both gate drives from the PSU controller in phase? That would be a problem.
Russel, the PSU is a Boost Converter and only has one drive pulse from UC3843 to three IRFB4110's in parallel.
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- KICKER CXA1800. 1 46CXA18001 part identification