Question about JBL JRX118SP Microphone

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I have a JRX 100 I have ran through all of the voltage points and everything is showing up. But there is still no sound. It was running then it powers but nothing. All the voltages are getting through each PCA but nothing. Where would I start to look? I have great DVM and I am a BSEE just lost at this point

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  • Mike Dolbow
    Mike Dolbow May 10, 2010

    I have a JBL JRX-100 Bass bin that has no sound. I have checked its self powered amp at the power source and through the circuit but I can not find the problem. I think it is in the pre amp section but with out schematics all i can check is that each IC and transistor is getting voltage. I am not finding the burned out component.

    Can you point me in the right direction in order to check?




  • David Dunn
    David Dunn May 11, 2010

    Can you define the product more precisely? What is it?

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  • Master
  • 8,546 Answers

I'd do some more triage before cutting into the patient.

Do you KNOW the speaker driver itself is ok?

Do you KNOW the audio input is getting through to it from the source?

Posted on May 10, 2010

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