Question about JVC TH-C5 System

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Subwoofer when I turn the the center unit on the subwoofer green light comes on for about second and then goes off. you can not get any sound out off the speakers.the center unit will play the DVD (but no sound) please help

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6 Suggested Answers

  • 203 Answers


Check your cable that runs between the main unit and sub for bent pins. If they look fine there may be a short in the sub itself that is causing it to go in to shutdown.

Posted on Jun 15, 2007

  • 322 Answers

SOURCE: No Sound even through SCART

the subwoofer is your amp so it won,t give sound till you get the part any electrical shop should help you if you exsplain what you need ?

Posted on Jan 28, 2008

  • 1175 Answers

SOURCE: Subwoofer not working

cut n paste the link for the manual

Are headphones plugged into it?

Is the headphone jack damaged?
Are there speaker fuses on this model? If so, check them.

Posted on Feb 28, 2008

  • 1635 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

  • 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

  • 624 Answers

SOURCE: JVC TH-M505 No Sound

It is possible that a fuse has blown in the sub-woofer box. This unit has the entire amplifier built right into the sub-woofer. It also has a number of fuses in it. I have found that over the years fixing these units that if a fuse is blown you will also have more serious problems in the amp circuit. That is usually why the fuse will blow. They sometimes even have a problem in the main head unit with a digital transistor that is a surface mounted transistor that will cause this problem also. This transistor is part of the turn on circuit that signals the sub-woofer to turn on when the head unit is turned on. None of these problems are an easy fix I am sorry to say.

If you have at least a little experience with electronics and the right tools, like a multimeter and soldering equipment, I may be able to help you figure out the problem. But be aware that these are not easy to fix, and you may spend lots of time trying to figure it out just to find out that you will still need to take it in to a service center and in many cases when somebody tries to fix these type of units and have no experience with them they often cause more problems than they have started with.

For starters you can at least check the fuses, but please be sure to unplug the entire unit from the wall outlet before doing anything, there is a big risk of electrical shock.

The bottom of the sub-woofer has 6 screws in it (If I remember right) and those 6 screws must come out, they are rather big and you must use a number 2 phillips head screwdriver. Then after that you must take out all the screws from around the edges of the black metal panel where the speakers plug in to. When those are all out you can pull the amplifier unit right out of the sub-woofer box. Be careful when you pull it out, you will need to unplug a set of wires to get it all the way out, maybe two sets of wires, I am going off of just my memory right now, but if you need more help I will look up the service manual to help you more.

You will find at least one fuse right near the board where the A/C plug goes to and then you will find a few more fuses on the board that is on the right side while looking at the amp block from the same position you pull it out from and this board is plugged into the bottom board and is vertical but the short side is up and down, the long side is going towards the back of the amp and it is running along the metal chassis on that right side.

I hope this helps you, if you need more help just post your questions here.


Posted on Nov 26, 2008

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  1. The wireless link indicator lights red. Or alternates red and green.
    There is no link between this unit and the active subwoofer.
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    Ensure that the digital transmitter is fully inserted
    into the digital transmitter dock on this unit.

    Turn the active subwoofer off and then back on.
    Alternatively, turn the active subwoofer off, disconnect the AC power supply cord and then reconnect it.
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    Taken from the Panasonic SC-HTB520 Manual

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Powered subwoofer doesnt work .stopped a couple of months reads SW on the amp display.sw is turned on -green light on-wiring is all healthy and snug.home theater hasn't suffered any abuse.always...

I sounds like you have blown the woofer. open the unit and check. first disconnect the leads on the woffer, then use an ohm meeter. If you don't have an ohm meeter use a 9v battery across the speaker terminals. If you hear a thunk when the battery touches the terminals the speaker is okay. If tyou don't it's gone. If the ohm meeter reads some number like 4 to 9 the speaker would be okay. If it reads nothing or 000 then it's gone. If you need a speaker you can order it from Pro Line Music 215-736-8055

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Hiya, sorry that will have to go in for repair as it sounds like it may be protecting. Could be something loose but that would be lucky. Suggest finding a electronics shop in area that can assist. Best of luck

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I have a RCA RT2250 and I have a green light on a circuit board

Check the solder connections on the seven voltage regulators found in the center of the receiver on the heat sink from front to back (not the amp board) they are on the main board. The green light on the DSP board (back right side) is an error light. You can reset the receiver by pushing power then stadium then night then dsp off then club after unplugging the receiver and plugging it back in.

Hope this helps,

Jan 10, 2009 | RCA RT2250 System

1 Answer

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,

Nov 05, 2008 | JVC TH-C5 System

5 Answers

SP-PWM505 subwoofer does not stay on

Well i had exactly the same problem, my sub turned off right away when i turned the whole thing on. Well i opened the subwoofer and was trying to find out something unusual, i took out, i believe, internal amp, well, whatever that thing is, under the lid. Which one is screwed with 6 copper screws, so you unscrew those screws, lift that lid and that whole board comes out. On that board i find something like burn around one of the parts.

you can see it in the pick, the part q2902, then i contacted JVC. At the beginning they said i need to take the whole thing to service center and so on. But later i made them to tell me what kind of part that is, so here :
bought soldering gun in home depot for $15, returned after i was done. And that is it, just have to replace it, but total cost only $12 ($5 part +$7 shipping)

May 15, 2008 | JVC TH-M505 System

1 Answer

Power issues: will not turn off or function

Unplug all of the speakers and power on.Its possible that one of the speakers is causing the protection circuit to activate.If powered on and subwoofer works start reconnecting one speaker at a time( after powered off) and retest each time.One Speaker may be bad.Its also possible the output ic is failing under a speaker load.There are no fuses related to this issue.If its not a speaker problem then the subwoofer will need to be serviced.

Feb 24, 2008 | Panasonic SC-HT730 System

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Can't get sound from the wireless subwoofer

There are 2 things you can try, first ensure that the digital transmitter is fully inserted into the slot of the main unit. Secondly do you have any other wireless devices near such as cordless phone or wireless network equipment? See page 5 of the installation manual as per this picture.......

Jul 25, 2007 | Panasonic SC-PT1050 System

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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).

Sep 10, 2006 | JVC TH-M505 System

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