20 Most Recent JVC HX-D7 Shelf System Questions & Answers

exact same issue and I have cut the wires and get them and I'm still having the same issue as they are unplugged and it still does it but I'm not sure what else I can do to fix that problem. I have unplugged it and let it sitting for a few hours but the bottom of it warm which I don't think that's normal as I have worked with stereo systems for cars to home theatres just a normal stereo system like I have at home here.

most of the time the main o/p ic goes bad after awhile due to age & heat ..

I have fixed problem like this...i just replaced stk411-550g power ic and the unit is in full operation...

could be your speakers or blown fuses controlling power to main ic

Hi ,
Does your unit go into protect mode without speakers connected?.
Jango

your lucky it wont get stolen

Look in user manual index for "unlock". It shoud have a default code there.

If not, plz provide the full product model #. It should be on a tag on the back or bottom of your unit.

Hi ,
Does your unit go into protect mode without speakers connected?.
Jango

The problem is that the output amplifier section has a problem and the protection circuits are shutting down the system to prevent further damage. This should be a simple repair for any local service shop. If you can't find someone local, look up at the JVC website for an authorized service center. Use your zip code to locate the closest one.

Dan

Most likely he has a couple of the connectors crossed. It is going in protect mode to keep it from damaging the internal electronics. Open it back up and double check all connections. then let me know.

Disconnect the speakers and turn it back on. If it still says "protect" it needs serviced. If not, turn it off and re connect one speaker at a time and turn on. If it goes back into protect, you need to check the speakers themselves for an internal short or a blown voice coil. If you have a multimeter, check the impedance on the speakers or the resistance on the speakers. If the meter reads 1...... the speaker is more than likely bad. If you need further help, post a comment and I can help you further.

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.

Check for loose speaker connections as a root cause for intermittent shutdown.

Generally speaking, an amp protects itself from heat, shorts and overloads.

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.

This is related to several problems, but the main problem is with the audio connection.

1. First disconnect the power cord from the mains and unplug the audio cable. Leave it for few minutes while you follow the next step

2. First check the audio cords, if possible try with another, (don't connect the audio cable this time).

3. Turn down the volume and all the controls, now turn on the system. [I hope the system's ok this time] Connect the audio cables one by one, and find out which on is creating the problem. [if it displays the same message at the first connection, try the second after removing the first, don't connect one after another, do it one by one, means if one connection is made and you find no problem, then unplug it and do the next] If this doesn't help, you need to follow the next step. *I hope this will definitely help you find out the culprit*

4. You final option is to call a technician.


Good luck.

Thanks for using FixYa.

for as long as it is a universal remote it will work with any appliances