No sound and 1.3v measured to all defective channels without load. Yes the output dc changes with load or no load. Ive checked all mosfets seems ok. No leaky mosfets.
3 amplifiers has the same issue.
Check coils, snubber circuit were good.
I think there is a weak parts on this kind of amplifier and needs modification.
Thanks in advance..
3 amplifiers has the same issue.
Check coils, snubber circuit were good.
I think there is a weak parts on this kind of amplifier and needs modification.
Thanks in advance..
Are the same channel defective in all of the amps?
With a load and signal source connected, have you tried operating all pots and switches through their entire range to see if audio (or noise/static) ever played through?
Do you see rail-rail oscillation on any of the output FETs in any of the channels?
With a load and signal source connected, have you tried operating all pots and switches through their entire range to see if audio (or noise/static) ever played through?
Do you see rail-rail oscillation on any of the output FETs in any of the channels?
IF you do not have measurable (or very low) DC with an 8 ohm load and to boot 1.3V DC appears only when unloaded and muted, then I guess you "do NOT have a problem".
Maybe "nothing is broken" but simply under those conditions the output squarewave or duty cycle is not perfectly symmetrical and that´s read as a small DC component.
Maybe "nothing is broken" but simply under those conditions the output squarewave or duty cycle is not perfectly symmetrical and that´s read as a small DC component.
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