Question about JVC TH-M303 System

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Auto muting My JVC TH- M303 is showing auto muting. I cannot get it to turn off. The DVD or CD's will play, just no sound. One morning i turned it on and heard a loud noise kinda like feedback or something and it has not worked since. Any ideas. Thanks.

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I found and article that said one of the defective parts that causes this is an open R2702 resistor. It's a 470 ohm resistor found in the subwoofer component. I opened up the subwoofer and found it back on the right hand side near the transformer. I used alligator jump wires to connect a good 470 ohm resistor across the existing resistor to test it, and IT WORKED!
Getting at the circuit board to replace the resistor is going to be a nasty project. My advice: If you don't actually have 470 ohm resistors lying around your place, you probably don't have enough electronic knowledge to repair this unit. Get a friend who is comfortable with electronics to do it for you. Their labor (a couple of beer) will be much cheaper than a repairman. The resistor costs about 2 cents (I buy in bulk - 470 is a commonly used value), so it's a shame to hand out about $100 to do the repair.
Testing the resistor is easy. To open the unit up, there are a bunch of screws on the bottom and a couple of screws on the side. Then the electronics slide out of the box. NOTE: You will have to disconnect the wires to the subwoofer speaker to slide out the electronics. Then you can reconnect the speaker to test it. BE CAREFUL! There is enough exposed high voltage to fry yourself on the board!

Posted on Apr 23, 2017

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Sounds like something inside went south. You can try disconncting the speakers and see if it still happens. If so, then the system is in need of repair. If not, then a speaker may be shot. Try connecting one speaker at a time to see which one may be causing the auto-mute problem.

Hope this helps, and please rate my advice, good OR bad.

Good luck!

Posted on Feb 04, 2008


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Posted on Jan 02, 2017

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