Question about JVC TH-C5 System

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No Power to Subwoofer (SP-PWC5)

One day the light went out on the subwoofer and never came back on. We have electrical storms from time to time so I figured I blew a fuse. I took off the back plate and tested all 3 fuses and they tested fine. I then read that a bad cable from the center unit to the sub may cause the problem so I ordered a new cable and it still didn't come on. I guess I may have a blown transformer because I don't get 12v DC on the cable from the transformer back to the board (not sure if I tested it right since it has 2 reds 2 blues and a black). Any ideas?

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  • Anonymous Sep 10, 2008

    no power to subwoofer

  • badavis Sep 15, 2008

    If you ohm out the primary side of the ower transformer you will notice you have an open. This is do to the internal 5a fuse blowing. There is nothing you can do other than relce the QQT0482-001 transformer if you can find one.

  • shiel85778 Nov 11, 2008

    While rearanging the placement of my th c5 powered sub by scooting it across the carpet, I recall a sudden and loud pop and saw a spark like flash for an instant. Now their is no power to the woofer and no green light, however, the center channel works; but no sound is possible.

    If this was caused by a power surge, how can I fix?

    Also, I found three fuses inside the sub compartment that looked good but was wandering a good rule of thumb when visually inspecting the fuses, and how can I see whether they are still good?

  • inthehood47 Dec 20, 2008


  • Anonymous Jan 24, 2009

    Yes. Just bought a new DinPin wire, and when I turn the reciever on the sub clicks as if attempting to turn on, then clicks again as if turning off. Light on sub never turns this a problem with a fuse in the sub or reciever, and if so, should I just buy a new fuse or a whole new sub/reciever??? So many questions, so little time.


5 Suggested Answers

  • 203 Answers

SOURCE: subwoofer not powering up

I could either be the sub or the main unit. The main unit actually sends a signal to the sub to turn it on so if that circuit is bad in the main unit the sub is never going to come on. I've also seen bad cables (You'd be amazed at how stubborn people can be when din connectors don't cooperate).

Posted on Jun 15, 2007

SOURCE: jvc th m603 center unit - powered subwoofer

Yes go to It will cost you $20.00

Posted on Mar 31, 2008

  • 1667 Answers

SOURCE: SP-PWM505 subwoofer does not stay on

It is possible that the power supply, and or the internal amplifier has some components that have failed. The unit will have to be serviced.

Get in touch with JVC to find out if your unit is still under warranty, and to find out who is their authorised service rep for your area.

Jerry G.

Posted on May 15, 2008

  • 33 Answers

SOURCE: sub won't stay powered up

well if your getting sound out of your surround speakers then the sub is busted, if your getting no sound at all then your speaker input's are either bad or out... i would test the speaker inputs...

Posted on Aug 09, 2008

  • 59 Answers

SOURCE: Subwoofer powers up and clicks off after 2 seconds, no sound, ever.

if you know what a transformer is, and if you have a multimeter, i suggest you to go ahead andcheck the transformer,

Posted on Nov 05, 2008

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