Question about JVC THC3 Home Theater System System

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JVC XV THC3 Subwoofer fan not working

Can you tell me what to do. My surround sound, sounds great but the cooling fan on the subwoofer does not work. What should I do?

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Maybe its not pluged in

Posted on Jul 10, 2009

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Posted on Jan 02, 2017

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I have a JVC surround system, I have power to both the DVD player and the Subwoofer but no sound. Wheni plug in earphones to the dvd player there is sound but nothing when unplugged. Could it be the S


You must have an external cable connection from the DVD audio output to the surround DVD input. As well there should be an output from the surround marked subwoofer. Connect them with the proper cable

Apr 04, 2012 | JVC TH-S8 System

1 Answer

My JVC THC30 subwoofer won't power on therefore no sound since all the speakers run through it. How can I fix this or is there a way to replace just the subwoofer?


If you're saying you have a defective subwoofer that keeps the system from coming up you might find one on eBay. many owners of HTIB's sell off the remaining bits as parts die off.

Or maybe your subwoofer comment is not related to your power problem.

Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.
Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as a root cause for intermittent shutdown.

Apr 18, 2011 | JVC THC3 Home Theater System System

1 Answer

We have a jvc home theater surround sound system and the subwoofer just stopped working. the model number for the sub is sp-pwc30 and we want to just replace the subwoofer any ideas how to get one?


Depending of the type of Subwoofer that required your system.

A) Amplified Subwoofer. (With 110volts A.C. cord attached to the sub)
The subwoofer electronics circuit needs repair or change.
You will find a compatible subwoofer for this type of subwoofer in audio appliance stores.

B)Not amplified Subwoofer (No 110volts A.C. cord attached to the sub)

Bring your sound system to a technician to have the soldering remaked to the devices bolted on the main heatsink.
And have the Subwoofer checked too.

This type of subwoofer can mostly be buy in kit with the satellites speakers.
And need to match thee impedance of the output of your system.

Search for ( 4 ohm or 6 ohm 8 ohm ) near the Sub outlet behind your system.

Spider Guy

Mar 15, 2010 | Audio Players & Recorders

1 Answer

Connecting a subwoofer to JVC KW AVX800


Hello pmdharan, It sounds like the subwoofer is not turned ON. Go to MENU ITEM > SPEAKER SIZE >SW (subwoofer) and select ON. Hope this helps.

Jun 06, 2009 | JVC KW-AVX800 CD Player

1 Answer

How do i connect my subwoofer to my sony dvd player to get the great surround sound?


there will be a subwoofer pre out( needs to be amplified) or if it don't have subwoofer pre out you will have to send the audio out to a stereo reciever that has inputs for the optical ( digital audio signal )( to a stereo or surround system that has 5.1 or higher has full surround sound ) and of course L and R audio inputs and the subwoofer pre out , then the subwoofer pre out will have to be amplified by a reciever , subwoofer amp , surround sound , ect

Oct 17, 2008 | Televison & Video

1 Answer

JVC Subwoofer problem.


You may have a break in the wire. You can find out by slowing moving your fingers down the wire until you notice sound coming from the subwoofer. You can fix it yourself by cutting about an inch away from the break both ways. Then cuttings some of the wire off, so the copperwire is exposed. then wrap the two copperwire ends together and seal it with elections tape. or Try replacing the 60 watt subwoofer wire.

Apr 16, 2008 | JVC SP-PW100 Subwoofer

1 Answer

No signal on subwoofer out in Onkyo TX-SR703(E) - similar to TX-SR803


Hey Tad, I have the same problem and perhaps a solution. I just moved to the other SW "pre-out" and it seems to be working..the green light is on . Whatever works i guess.

Jan 24, 2008 | Onkyo TX-SR703 Receiver

1 Answer

JVC TH M505 Subwoofer not working


i need to find the wire that connects from the subwoofer it has like little spikes inside the medal part and the spikes broke off

Jan 12, 2008 | JVC TH-M505 System

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