Question about Volfenhag ZX-8200 Car Audio Amplifier

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ZX-8100 I have a ZX-8100 that has a blown transistor (Q43) but, it is burnt so bad I cannot identify any numbers on it. Do you know what it is or where I can view some schematics?

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  • mikedef Jul 16, 2008

    I have a ZX-8100 that has a blown transistor (Q43) but, it is burnt so bad I cannot identify any numbers on it. Do you know what it is or where I can view some schematics?

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I'm not familiar with that particular amp but generally, the only transistors that burn are the ones in the power supply. If the adjacent transistors had numbers like IRFZ44, IRF3205 or similar, the burned transistor is likely the same as the ones next to it.

Confirm that the center and right-most leg of the burned transistor and the transistor next to it are directly connected by large traces on the circuit board. Also confirm that the center leg goes to the large windings of the power transformer. If it passes these tests, the transistor is one of the power supply FETs. The numbers on the adjacent (parallel connected) parts will be the same as the burned one.

Posted on Jul 17, 2008

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Hi again! Been thinking about this and you might not need to wait for someone to answer. I assume the transistor in question has blown apart or burnt up so you can't read the number?
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