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JVC JA-S44 no audio output

JVC JA-S44 good a/c and d/c voltages. VU meters light but no signal. No audio output. Fuses good. Suggestions welcome.

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hifista
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Hi!
The most likely possibility of an error is a short circuit in the speaker output,and the DC protection prohibits the operation.
In this case, you can measuring in L301-R339 ( the another channel L302-R340) around + or – 40V, the  IC 301 or 302 (STK0050) are damaged.
Hifista.
 

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attila.p
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