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JVC THM303 - No Sound

Hi - I have a JVC THM303 home cinema system - the problem is there is no sound. Sound can be heard via the earphone jack, but not via the subwoofer and connected speakers.
Power light is on the subwoofer, but nothing else.

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  • dc260176 Dec 16, 2007

    Thanks for the reply - however where can I get a replacement?

  • Anonymous Mar 23, 2014

    Subwoofer stopped working



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  • 138 Answers

Its your wire connection problem. Plz check that all the wires are connected to specific location. If wiares are ok then it might be internal circuit error! that should be repaired at authorised service stations.

Posted on Dec 08, 2007

    KALPESH PATEL Dec 08, 2007

    i think amplifier must be not working if wires are ok



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Posted on Jan 02, 2017


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Speaker is off

Most of these combo units do not have a speaker ON or OFF setting but look anyway.

If the set has a earphone jack that may be the problem--see if works with earphone plugged in.

The socket the jack goes into can get flaky as when jack is inserted it turns the sound OFF.

Also put your ear right to the speaker to see if anything at all is heard--the speaker could be bad--but check the above first.


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No sound from my stereo but powers on and can see EQ is moving. But when I plug my headphones in i get sound just nothing from the Speakers

Your problem is in between the speakers and your earphone jack but it has a hight chance that the fault is in the earphone jack.
Since when you plug your headseat, sound is coming out, this is an indication that your output IC is working. When you plug the headset the line will cut-off through your main speaker to hear the sound in the earphone only. But if you unplug the headset the contact will back to the main speaker. The problem is, the lead is dirty due to dust. You can spray it using the contact cleaner. I will not advice you to spray any penetrating oil but contact cleaner only. If the symptom is still there then this is the time to replaced the earphone jack with a new one.
Hope it may help you.
Have a nice day.
Thanks for using fixya.

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