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Old 4th April 2018, 02:49 PM   #1
megael9 is offline megael9
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Join Date: Oct 2009
optidrive 700x2
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Amp came to me with 2 blowing mosfets. 1 C5242, AND 1 A1962.
After replacing these parts, I noticed that one channel have -75 volts.
All signals are present at the mosfets gates.
any idea?
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Old 5th April 2018, 07:03 AM   #2
MarioRestucci is offline MarioRestucci  Italy
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The 2 components you found are BJT transistors, they are not mosfets.
Probably the drivers of the malfunctioning channel will also be burned.
Uninstall them and check for short junctions.
WARNING! it may not be the only problem.
Try taking a close-up photo of the channel area that does not work.
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