Question about JVC MX-D661T Shelf System

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Sound cuts off at higher volume

About 4 years ago it started cutting off sound at the higher volume levels (above 15). We have been able to live with it until recently, but now it cuts off sound around level 12. This problem applies to all modes of operation (CD, tuner and cassette), and it gets worse with the "Bass On" button selected. I would immagine it is some sort of unit protection feature not working properly.

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Cruel dog
  • 8 Answers

SOURCE: system keeps sayin protect

The word PROTECT appears because there is a short. It can be in your speakers, try running it without the speakers plugged, or look if the wires arent shorting. If it stil ldoes that, its cause there is a short in it, from the output section. The system does that to prevent from damaging the electronic components inside.

Posted on Feb 21, 2007

SOURCE: Protect

I know I'm finding lots of old posts about this JVC model MX-KB30 "PROTECT" problem but - I FIXED IT!!!! 8-) Daugter had the same difficulty after a series of power outages. Figured it had something to do with the speaker circuit board. Decided to look for a reset on the board itself. Not sure that I found one, basically becuase there was not a perception of a button pressing down, but the "PROTECT" cleared and the sound is coming through the speakers again. The sterio works fine. First - as when working on all electronics - unplug the unit and make sure all static electricity has been discharged before working on it. You will need a small jewlers philips screw driver as well as a mirror for looking down on top of the electrical components. Remove the cover of the sterio surrounding the sides and top of the unit - there are screws on the sides, top and around the edges of the back fo the unit related to this piece. You do not have to remove any other pieces. There will be a circuit board attached to the back center of the unit that has a black cable running to the headphone plug and the speaker connections are also running through this board. If you face the front of the unit, looking at the sound circuit board from the right side, there will be a small black - square looking - voltage regulator (I think that's what it is anyway) that you will see some voltage information and some switch setting pictographs (along with the numbers 1, 2, 3). On top of this black unit (here is where you need the mirror) there is a square hole that looks down inside this unit as well as a round hole that you will see white plastic inside. Using the jewlers screwdriver, carefully press on the white plastic once or twice (I couldn't tell that it had pushed down) particularly becuase I have no clue how sturdy this piece is. With the cover still off the unit, plug it in and make sure the "PROTECT" message has disappeared and the speakers are working again. That's exactly what I did and the darn thing started working again. Maybe I just got lucky, but this is a nice sounding unit and it would be a shame to see folks toss it away for such a simple fix if that is indeed what did it. Enjoy!

Posted on Apr 23, 2007

  • 71 Answers

SOURCE: stereo goes into protect mode

Protect is a safety feature so that you do not blow your speakers. However with it hooked up with the computer you may have surpassed the max output. If it still does this with out going through the computer, it has been damaged.

Posted on Mar 15, 2009

jr fix it
  • 5 Answers

SOURCE: System seems to operate fine but no sound

there is something that is called a relay in side of the set when u open it u will see it were u put the speaker wires behind that two black boxes those are the relay look between them n see if any thing had burn if so u need to change that part of reach me at 742-2520 if u want

Posted on Jul 14, 2009

  • 48 Answers

SOURCE: The tuner, tape player, and cd won't work and the

protect means, service mode, or in other brand it's says f16, the only solution to fix that problem is to bring it into jvc service center

Posted on Jun 19, 2010

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Speaker requirements are likely to be 8 ohm, most modern hi-fi speakers are. A few low-fi systems have used special high impedance speakers and the old hi-fi standard for valve amplifiers was 15 ohm and 3 ohm or lower has been used in televisions a lot.

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