Question about JVC HX-D7 DVD Compact Stereo Audio / Video System with 5 DVD Changer Shelf System

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Protect everytime I turn this device on it flashes status and then goes directly to PROTECT the goes into standby, i tried resetting it, but it still does this, any ideas?

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  • pimp_in_lil Oct 25, 2008

    when i turn on my jvc dvd stereo player it says status then protect. Then after that it powers down even when the speakers arent plugged in.



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The protect message indicates that a problem has been detected in the final output stage of the amplifier. The most common failure parts are the output transistors. Plan on a parts cost between $15-$40. Add in the local labor rate for the total repair cost.
Dan

Posted on May 29, 2008

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Hello.. I have Sony MHCEX500 MINI HIFI Component system. There is a problem of PUSH POWER PROTECT. How can I fix it..????


The "PROTECT" and "PUSH POWER" messages will flash alternately when the protective device of the amplifier has been activated because a strong signal was input, or if there is a short-circuit detected. Press the POWER button on the unit to turn off the system, and check the following items after "STANDBY" disappears.

1) Are the + and - speaker cords short-circuited?
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According to Page 46 of the LBT-W5000 Operating Instructions:
"The display stars flashing as soon as you plug in the power cord even though you haven't turned on the system (demonstration mode).
Press DISPLAY (for LBT-W5000 / W300 / XB700 / XB500) or DEMO (STANDBY) (for other models) while the system is off. If the system is in the Power Saving mode, press POWER SAVE / DEMO (STANDBY) (for LBT-W5000 / W300 / XB700 / XB500). The demonstration appears automatically the first time you plug in the power cord, or if there is a power outage lasting longer than half a day."
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'PROTECT' MSG EVERYTIME TRYING TO OPERATE


This appears to be a very common problem here on the board. It means the unit has shut off the outputs because of either a bad speaker or shorted wire, or some failed part in the amplifier. If the trouble continues after you disconnect the speakers, the unit will require service to diagnose and replace the failed part(s).

I've never worked on this model, but in many brands the amplifier integrated circuit is a common failure. They are often not properly mounted for efficient cooling and burn themselves out. Another typical failure is some power supply part that is under-rated and just goes bad, and this is showing up as the protect failure.

Without a diagram and no direct experience, I can't suggest any specific action you could take, other than checking with a local shop for a repair estimate. (You might try contacting JVC on their website or by phone to see if they have any service bulletins. If something becomes a chronic issue, the manufacturer sometimes extends warranty service to cover the repair. Never hurts to ask!)

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Check the connections of the speaker wires. You may have a short between one of the pairs. Try disconnecting the extra speakers if nothing is obvious. It could be a damaged cord also.

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Protect means that a problem was dtected and the output amplifier section has been disabled to prevent further damage. The typical failure parts are the output transistors. Expect a parts cost between $15-$40. Add in the local labor rate for the total repair cost.
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It is most likely an amplifier problem. I had this problem before. It went into "Protect" mode and shut down. When I turned it back on, my left channel speakers made a buzzing noise and did the same thing again. I got it diagnosed at an electronics repair shop and they found that the two STK amplifier IC's were bad. One is about $106 and the second one is about $78. I got it fixed for about $200 and works basically like new again.

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The audio output ic's need to be replaced. need to contact and audiotech to do the job . the job require experience to be done. around 60.00 in parts . if you need more help let me know.

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