Hello
I got a Classe CA-300 in trouble. It doesn't work. I opened the top and saw that R132-133-134-135 are severely toasted on the mosfets drivers. The problem is the same on both channels. I didn't test the mosfets but they are probably also bad. The outputs will also be checked. Is there a specific reason why drivers resistors burn like that ? Thanks
I got a Classe CA-300 in trouble. It doesn't work. I opened the top and saw that R132-133-134-135 are severely toasted on the mosfets drivers. The problem is the same on both channels. I didn't test the mosfets but they are probably also bad. The outputs will also be checked. Is there a specific reason why drivers resistors burn like that ? Thanks
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I don't know much about this amp, but I would guess overheating would indicate excessive current in these resistors. I assume you have the service manual for this. I would look at the output devices and determine whether any are blown or not. The driver mosfets could also be bad, and those particular ones are discontinued and hard to source (a user here on diya has them though).
There is a fairly extensive thread here (which I suspect you've already found) regarding a recap of this amp and associated problems.
There is a fairly extensive thread here (which I suspect you've already found) regarding a recap of this amp and associated problems.
