Onkyo-593 No power and now clicking sound

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  • Sisko
    New Member
    • Apr 2020
    • 5
    • Canada

    #1

    Onkyo-593 No power and now clicking sound

    Hi all!!

    Ok just got a Onkyo SKW-593 sub woofer that has no power person told me that it smoked and that his GF let the volume full when she powered off the amp and when he came to turn it on the sub played but then suddenly smoke was coming out, didn't say from where. So opened it up and saw a resistor made of metal (pic) but can't see any writing on metal par so what ever was written on it was burnt. So I'm kinda stuck here with this. I did ask for a repair or schematics in the other group section and waiting for this but I hope someone here might lend me a hand to try and identify this resistor and on the board it is marked with this symbol; "W" yep a w just as if it was a fuse but it's not that soldered par has an R. Ok just looked it up on the microscope and I can't see any writings at all BUT I do see 3 bands one is thin and the other two are bigger and since its burnt the bands are black as you can see in the photo. So now what? any help with this would be very appreciated!!

    UPDATE!!

    Ok Replaced a few parts but now getting a "clicking sound" when powered on and yes I am plugged with a dim bulb thing. For now I know it's in "protection mode" did lift pin 12 VCC on the IRS2092 and two big caps (and other parts in the red section) and I get 0V BUT when it's clicking I get very faint voltage readings. So right now I have no idea where to look for. I did ESR on the 4 big caps and all checks out ok and did voltage test on the longest 2 caps but not getting voltage because of the clicking sound. Before changing the parts (3 parts pic) that weren't good it wasn't clicking at all but after it started to click. I'm trying to learn to fix electronics as much as I can but this one is a bit hard to find the problem but I'm asking you PLEASE no jokes or stupid answers. I have provided schem, parts changed and a pic of the section that is causing the problem. Any help would be very welcomed.


  • madan1
    Badcaps Veteran
    • Nov 2016
    • 708
    • Bulgaria

    #2
    Clicking usually means that the smps can't boot.
    Show on the schematics where is the "W" part.

    Comment

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