Question about JBL PSW-D112 Speaker

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Blows fuses My sub stoped working. dead, no sound, no LEDs nothing. I opened back & fuse was blown, so I replaced it. Put it together & turned it on w/ no cords connected & it makes a humming sound for about a second & goes dead (blowing the fuse). I tried again & same result. What could it be? What should I do?

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I found a post where someone replaced several capacitors with ones he described as titanium and a higher voltage like 100 v rating rather than 50 as oem. He states no more problems. I found this site while searching again. I also found a free download pdf repair manual from JBL - site defined as Harmon, and they show revised parts replacements for these caps - 100 volt. I just bought a used one and not hooked up as yet, but I plan to use slow blow fuses and possibly a little higher rating - not much though, and I believe there is a ceramic type - color solid white - that may withstand the apparant surge. Theres also a recent post somewhere for sale of the amplifer board... 64smi or something like that. Hope this helps. Ken

Posted on Mar 24, 2007

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6ya6ya

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Hi there,
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Posted on Jan 02, 2017

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Controler and sub woofer no power


This previous diagnostic, isn't good, if you test and no continuity between the positive and negative terminals generally means a blown sub.

You won't always get scratching or distortion from a blown sub. Sometimes the voice coil just overheats and burns out like a fuse. In this case there will be no sound at all from the sub, because no power can flow through the voice coil. A continuity test between the positive and negative terminals will show no connection.

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I have a Sharp VC-H982 VCR. Went to turn on today and it is not getting any power. Worked fine last night. I have moved the power cord to a different receptical, still nothing. Is there a fuse that may...


Hi:
If the unit is totally dead meaning no standbye light of or nothing on the display its dark, then you may of blown the AC line fuse. This is the first thing to check the fuse is inside the unit you can trace its location by taking off the top of the VCR and tracing the pwr cord to the point where it connects to the power supply, here is where you will find the AC line fuse use a ohm meter set on continunity to check the fuse for open condintion. If open or blown replace with same voltage and Amperage rating as indicated on the board or the fuse itself. If you find the fuse is good then you have a power supply standbye voltage missing and is related to the power supply. In which case it may be cheaper to just purchase another.

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Stopped working


Sounds like a probable blown fuse. If you open it up, check near where the power cord attaches to the circuitry-- the fuse will be around there. If it's blown, take the fuse to Radio Shack to see about replacement.

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if you change amps and it goes on protection the speakers are blown causing the amp to protect try changing speakers

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If you've overheated it a number of times, it's possible that you've damaged the amp and it's trying to protect itself even though it's too late. Try disconnecting the sub from the amp. If there's no change, then there's a problem within the amp. It could be a thermal switch or possibly a stressed amplifier module.

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I just brought mine to the shop for the same reason. I thought it was something big but it was just a bad fuse. It wasn't blown so when i checked it, I didn't think anything of. If you're using an AGU fuse, try and remove the fuse and touch the two ends of your power wire together and if it's the fuse it should cut on

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You may have a blown internal fuse. You''ll need to unplug the unit, remove the outside cover and follow the line cord and you should find the fuse.

Replace it with the EXACT same value that was labeled on the original fuse. You'll probably be able to find a replacement at any Radio Shack store or hardware store.

Replace the cover and plug the unit back in. Hopefully nothing was damaged and the unit will play again.

Please let me know if I can be of further assistance to you.

Good luck!

- Jim

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