Thank you very much. But what could be the reason for it to burn so much. does diodes can short just without any reason?
From my experience with these amps, the caps leak. The conductive electrolyte saturates the board and the board becomes conductive. When voltage is applied to the conductive area, the board heats up and burns.
I have somehow managed to create the connections through wires. i am getting the amplifier to come on. but it is pulling 2amps and without load if volume increase the current increasing too. and outputs getting hot even while idling . the waveform on gate of outputs have a dip on top. i am attaching the pictures. the driver board had plenty cold joints and i fixed but no luck.
Attachments
Is that tiny electrolytic supposed to be replacing one of the larger ones on the other side of the board?
No that is the small tiny capacitor besides the transformer which was connected to two diodes that were burn.
What is the VPP DC voltage on the driver board?
Black meter lead on the positive rail (center leg of high-side FETs).
Black meter lead on the positive rail (center leg of high-side FETs).
I am getting 0.63v on Vpp of driver board. amplifier on with current limiting resistor.
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