When I have the volume up high during a decent war type movie the unit shuts itself down. Have eliminated dodgy power board, loose mains power cord etc.
No flashing lights or anything, just goes into standby mode.
Any suggestions? Is it just the vibration of the sub-woofer maybe??
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No. If your using all the speakers that came with the unit, and unit was working correctly before then, your problem is an indication of a more serious problem about to occur. Your unit is detecting an over current situation. It could be something like a idle bias problem, or alighnment, or theres a part thats going bad and not up to specs. Oh Yes and one of your speakers could have a problem and just hasent went bad all the way yet. If it was my reciver , I would have it bench checked with some resistive loads and see on the scope, where the units clipping, if it is. If not the tech will know if its a zero crossover, idle bias or an offset thats bad. Without the proper equipment this is not a repair for you to attempt , unless of course you happen to be an electronic tech? Good Luck
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There are two causes for this. One that there is a fault on the amp that is causing an overload circuit to trip and shut itself down. Or the settings of your speakers levels are wrong. So you are turning it up to hear the quiet parts of movies and therefore when louder sections come along your are driving the amp too much. Some DVD discs that have THX on them have a sound set up on them. If you have one access the THX sound menu on the disc and adjust your speakers to produce the correct levels. If it does happen after that there's a fault. By the way most of the George Lucas films (Star Wars) will have THX on them.
That is a safety switch in most receivers. When something gets too loud it cannot give the load off to the speakers and shuts off to protect itself. This can mean that the receivers getting old, or that you might need to split the job. You might need an stereo amplifier to split the job. Check the cables and speakers. Recievers can only give so much to so many speakers at so much sound. That is what the whatts are for. The more whatts the better, the lesser whatts, the lesser speakers its going to be able to handle at high volumes.
check your wires if there not touching behind the speakers and receiver. when it says protect this means something is shorting out or crossing over. one other thing it may be is if a speaker is starting to go bad. (please rate)
sounds like you have the polairity reversed on the speakers
and yes it does make a difference
check polairity also make sure unit is well ventelated
you wouldnt use your compouter if it was inside a card board box
so make sure the reciever can breath also
recievers get too hot and they start blowing chips off the board
The reason why your receiver is going in protect is because there is a short circuit happening. This would either be on your speaker wires, speakers or receiver itself. What you want to do to check would be:
1. Unhook all sources and speakers from your receiver.
2. Turn on your receiver and crank up the volume to maximum, if your receiver does not shutdown or go on protect then the receiver is OK. If it does shutdown and go on protect then its an internal problem on the receiver and you would need to send that over to an authorized service center.
3. Hook up a source and 1 speaker. Play something from the source or the fm tuner, Crank Up the volume to about 46 or 47 volume. If the receiver does not shutdown, its good.
4. Hook up a second speaker and repeat the process until you encounter the pop and shut down
if for example you encounter the pop on the 4th speaker, try changing the speaker wires.
5. If the receiver still shuts down then it would be a short on the speaker itself and it would need to go to an authorized service center.
Several things can cause this: Loud signal passages can momentarily draw high currents at the mains, especially if you have unit plugged into power stripe with other equipment. Or if unit is plugged into isolation transformer, current draw may exceed output of transformer. Too many speakers hooked to output or if one is bad (partially shorted due to overheating)
That may be a clue to your shutdown problem. Disconnect that speaker and see if the unit still shuts down. If it does not, then there is a problem with this speaker,or the wiring going to this speaker. If the unit still shuts down, disconnect each speaker at a time to see where the problem is. If none of the speakers seem to cause the shutdown problem, there is na major fauly in the amp circuit, so the amp will need serviceing or replacement. Good Luck
Its eather a defect with the reciver top end shut down /over bias system , Or the speakers could be partially shorted, such as instead of being 8 ohms, the speakers could have a few shorted windings from a loud music event?? I would take the speakers in to be checked under load. NOT just checked for resistance.. A regular shop may not know how to do this BUT tell them you need to put the speakers under a load and then measure the resistance . GOOD LUCK