Don't know why and can't figure it out, but my reciever shuts down randomly after about and hour or two of use. Have had the reciever for about a month. It is not overheating as it is sitting on a shelf by itself.
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Re: Random shutting down
This answer is generic to most sound system amplifiers:
Check to see if the speakers are too low impedance for your unit. For example, if you have 4 ohm speakers and the system is rated for 8 ohms only, it can go in to protect mode (shut-down). If you are running 2 sets of speakers at the same time, and the total load impedance is equal to less than the spec of the amplifier, this can cause a safety shutdown.
The output stage power devices (transistors or IC's) can be going over temperature. This you will not be able to feely with your hand unless it was extremely severe.
It is possible that there is a component(s) that have become thermo sensitive, and when reaching normal operation they go out of specs. It is also possible that there is a cold solder connection and with thermo expansion from the normal increase of temperature, there is a loss of contact and the amplifier goes in to protection.
One other thing I have seen, is where the customer uses the amplifier excessively loud where there is some distortion. This causes some clipping in the sound. Sometimes the distortion can be very low to the point where to the listener the sound appears to be clean sounding. After some time, the amplifier will be triggered in to protection. If this is the case, you need a higher powered amplifier, or more efficient speakers, and or both.
You should get this checked if your connections to the speakers are compliant to the spec of the amplifier.
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If this amp is being overworked to much(playing music or whatever at high volume) it does this cooling it down could help or just leave it off for a hour or so it should work again then, i know this coz i have the same amp
for the past month i have been shopping for the perfect home theater system and have narrowed it down to a bose system,a sony system and a paramax p510...i have listened to all 3 systems and have found the paramax to be the better system not a cheaper system but seem more bang for my buck at 3200$,a very powerful tube amp and downfiring sub maxes out at 2000 watts...
The speaker cables are the ones that clamp or tighen down on the back of the reciever. All the spkr wires have to have the positive and negative leads correct. Also not aven one little strand of wire can be touching another conductor or you will have this problem. Make sure all leads are correctly ran and hooked up positive to positive and negative to negative from the back of the reciever all the way to the speakers. This should solv your problem.
Clean and tighten all connections. Get a can of spray tuner and contact cleaner from Radio Shack to clean the volume and tone controls if you have access to the body of those controls. Some disassembly required. If this doesn't help, suspect a bad variable resistor in the amplifier circuit.
this happened to me once and I found that my reciever would just shut down. make sure that you have plenty of space above the amp. it may be over heating and shutting down on you and when it cools down, it turns back on. there will most likely the "overload" light will be lit when it shuts down the audio.
The manual suggests disconnecting inputs and outputs and power, letting it sit for an hour, then plugging it back in and turning volume to max to see if it still shuts off. If it does, the problem is with the unit. If it doesn't, the problem is elsewhere.
Judging from some other sites, this is a common problem. If you take it to a dealer, suggest they check the AC input. Before anything else, make sure that there are no stray wires on your speakers connecting the positive and negative clips, which will cause a short and activate the amp protection.
I had the same problem with an Onky502 and replaced it today with an Onkyo606. It worked fine for an hour then started shutting off automatically. I'm following the manual and letting it cool off now for an hour, and meantime I'll check my speakers.
Well usually the best thing to do is unplug the unit from any power and leave it for about 2 hours to reset. that is a common problem when the unit has been played at a high volume or the speaker connection are not tight