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JBL Eon315 Eon510 turns on no sound output

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  • JBL Eon315 Eon510 turns on no sound output

    hello everyone
    i hve JBL Eon315 looks the same as 510
    it turns on power led blue on. mic switch led red on, microphone plugged in and the green led flashing ( mean there is the signal from microphone) but no sound output just a little hiss from speaker.
    when i touch some parts in the mixer board i got some load noise to speaker
    voltages: vbulk 320V and half vbulk160v on boath C610 C611
    on c645 and c647 -/+40v on c665 and c667 -/+5v
    output of U608 12.6v on schematic shows 15V but the amp turns on and stay on i removed the u608 and inject 15v to output resistor R643 relay clicks then i pluged the amp to the power turns s but no sound
    tested some capacitors for leaks and changed some but still no change no sound
    to here i dunno if the problem in the mixer board or power/amp board
    any help will be appreciate
    or if canot be fixed is there a way to bypass the mixer and connect the microphone direct to amp board
    thank you

  • #2
    When you turn up/down the level knob or the change the EQ switch does it change the hiss from the speaker at all? If you connect the xlr out to another speaker or mixer do you get strong signal out?

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