Replace at least the three input capacitors, as they make low impedance source for the switching FETs after the input filter choke. When these wear out, impedance is going higher, and FETs are all ruined. It may wort to replace the output caps on the upper-left, the supply of the amps really depends on them. Try to seek the next bigger capacitance value and use only good quality, low ESR ones. This fault usually takes some more resistors around the FETs, some diodes, the driver stage's transistors and even the TL494 sometimes.
Replace at least the three input capacitors, as they make low impedance source for the switching FETs after the input filter choke. When these wear out, impedance is going higher, and FETs are all ruined. It may wort to replace the output caps on the upper-left, the supply of the amps really depends on them. Try to seek the next bigger capacitance value and use only good quality, low ESR ones. This fault usually takes some more resistors around the FETs, some diodes, the driver stage's transistors and even the TL494 sometimes.
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ReplyDeleteHello friend, my Black Spider Mic Mixer Amplifier PXE-8, totally no power. Any advice. Thanks.
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