Question about JVC Audio & Video Receivers
The only way to reset these units is to unplug it from the wall for about 4 to 7 days, then plug it back in and see what happens. They do not have a reset button, and it takes a while to reset because they have a capacitor in the microprocessor circuit that holds the voltage for it for a good long while. The type of capacitor they use acts much like a battery and takes a long time to drain.
Your unit is in the protect mode, and it happens when there is a blown channel in the amplifier circuit or a power supply failure. The only way to determain exactly what is wrong would be to troubleshoot the unit using the proper tools. If you have a multimeter and soldering equipment you may be able to do this yourself if you have some experience with electronics. If you do not, you really should just take it in for repair at an authorized JVC service center. They would have the schematics and ability to troubleshoot it properly.
If you have the tools needed and would like to try it yourself just let me know and I will be happy to guide you thru the process. Please be aware that troubleshooting electronics by somebody with little or no experience with it can often result in more damage than you started out with in the first place. Having said that, if you are willing to try, I am willing to help. But if you end up with more damage than you started with you can not hold me responsible, I have warned you
I work at an authorized JVC repair center and have repaired many of these units over the years, so you would not be getting help from somebody who doesn't know what they are talking about. So just let me know if you want to take a crack at it.
Posted on Oct 28, 2008
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Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.
Overloads can be from excessive periods of high output 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 hands-on tech.
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