hello again friends, this time I come to ask for your support to solve a problem with a kenwood kac-x1200m amplifier, which with any load, blows the output fets, at idle the waves and output signal look good after of the coils, but when I start to give more volume it cuts off as if it were protected and returns repeatedly until it reaches the point that it flies 1 or 2 fets from the output stage, I do not find any damage, only the damaged fets, I will check one by one of the transistors that make up the pulsation towards the greetings output fets.
Are you using exact replacement FETs from a reputable distributor?
How many of the original output FETs survived?
Are the same 2 FETs failing repeatedly?
Are the FETs from only one bank failing or are they randomly failing in both banks?
How many of the original output FETs survived?
Are the same 2 FETs failing repeatedly?
Are the FETs from only one bank failing or are they randomly failing in both banks?
It is worth mentioning that it only happens when it is loaded, if I increase the gain without load nothing happens
Does the heatsink behind the output FETs heat up (FETs clamped to the heatsink) if it's left without a load and fed a signal (preferably music)?