Re: Protect mode turns the reciever off at fairly modest...
I Had the same problem.
It occurs when you have a speaker wire touching something that it shouldnt and and you are grounding out the system. The system is going in to protect mode to keep itself from being damaged
In my case I found that I had a couple of frayed wires from one of my back speaker terminals touching the wire on the other terminal. This was all it took. I re-inserted the speaker wires on that one particular speaker and made sure they were not touching and problem solved.
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Your Protection System probaly come on for some reason,Sony Is Known for that problem, Check on your screen if a red lit warning Staying (protect) Is on.If there is, Try hiting the reciever on the sides or the top of the cover fairly hard when it is turned on, Some times this will work to turn the protect light back off, Sony is bad for there amps end recievers going into the protect mode,
most of the receivers come with a cooling fan inside see if its working they usually work when you turn the volume up,, if its working that means you are playing it to loud if you lower the volume a little it will play just fine..( if the fan inside is not working thats the reason it goes into protect mode and it means you must have it repaired,, it goes into protect mode to prevent furter damage to the unit or the speakers,,
Check the speaker wire connections and make sure that none of them are crossed. Shorted wires will cause the reciever to turn on the protect mode to keep the amplifier from shorting out. Try disconnecting the speaker wires from the reciever. if you turn it on and it still says "protect" then the short is possibly in the reciever itself.
connect all source devices to the Sony LCD tv inputs. and connect the audio output from the tv to the aux input or any one input of the audio reciever. This way you can just leave the av reciever on and control all the input switching with te tv remote. Avoid connecting all the av sources to the reciever and the tv as a monitor from the video out of the av reciever. Just use the av reciever to reproduce the desired audio and do all the input switching with the tv remote. This will simplify the operation an lessen the chance of someone changing the audio settings of the av reciever.
I have the same unit. My best recommendation would be to remove all speaker wiring, and try new wiring with another pr of speakers,since the "outdoor " speakers were rained on. the protect mode that the unit went into sounds like it did because the speaker outputs were shorted due to the rain, so ensure that the speaker output terminals are not shorted and dry...also see if output is still availalable at the headphone jack...if it is, the pre-amp section is still good , in which case the protect mode and no volume output out of the speaker jacks may mean that youve blown the ouput trasnsistor finals. I hope this helps.
Protect on any reciever usually means that it has reached its maximum capacity of volume (known as clipping) and at the reciever is now automatically reducing the volume to avoid damage. This some times is triggered if the reciever was used hard and is now damaged so you would need to bring it to a repair shop. Sometimes its caused by a bad wire to the speakers, a short to say. Check all your wiring, make sure its not overheating and getting plenty of air. Some where its recieving a signal telling it to go into protect mode.
You may have loosened a solder joint on one of the components inside with your air blast. A repair tech would monitor the outputs DC offset voltage and he will probably see one that is not zero volts and while wiggling various things he should see a sudden change in the DC offset voltage on the bad channel when he touches the bad connection. Then it's just a matter of resoldering the connection. Good luck on this one.