Question about Jamo SUB300BA SUB 300 Powered Subwoofer Subwoofer

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Jamo Sub300. No power. No lights

Replaced the blown fuse (230V 800mA). Box shows no life what so ever.

Could not find the wiring diagram to check the power supply unit.

Posted by kushanthad on

  • kushanthad Jan 05, 2009

    Hi Thanks for the post. The box has no warranty as it's bought overseas. Checked with the dealer here and they confirmed it has no warranty.

    Yes. It's definitely looks like a power supply issue. problem is I dont have a wiring diagram to check.

    It has only 2 leads, no ground.

  • Anonymous Jan 12, 2009

    sme problm

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Anonymous

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  • 73 Answers

Well it would void the warrantee, but you can take the back panel off and the power supply will only have two leads (3 if grounded) in from the plug, and out to the crossover. It sounds as if you are correct that the power supply is bad.

Charles

Posted on Jan 05, 2009

  • Anonymous Jan 05, 2009

    so if you have the back panel off, and the unit plugged in, you will be able to read 115 or so volts right at the solder points. then those wires will go into the power supply. test them where they go in, and where they go out and give me a voltage. do not worry about positive and negative, the meter will just give a -115 if its backwards. Smell the unit, usually you can smell a burnt smell if its blown.
    Charles

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