Hello everyone,
I am new member on the forum, so this is my first post.
I have embarked on the power amp repair, and looking for some guidance on the basic amp repair. The unit's speakers terminals shows 70 V DC (rail power). To start, I have checked the the PS voltage (the same 68-70 V) , no shorts. Checked capacitors and resistors. The R17 resistor was replaced as original showed signs of deterioration. Found three burned output MOSFETS and replaced them, but the problem still persists.
Not sure what to check as a next step.
Thank you,
I am new member on the forum, so this is my first post.
I have embarked on the power amp repair, and looking for some guidance on the basic amp repair. The unit's speakers terminals shows 70 V DC (rail power). To start, I have checked the the PS voltage (the same 68-70 V) , no shorts. Checked capacitors and resistors. The R17 resistor was replaced as original showed signs of deterioration. Found three burned output MOSFETS and replaced them, but the problem still persists.
Not sure what to check as a next step.
Thank you,
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