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Re: NAD T753 5.1 Channels Receiver Problem
It could be a heat issue, is the receiver able to get air to cool itself? Also, a bad speaker or mismatched speaker may cause this. Sometimes hooking up extra speakers may cause this. Other than that, it would be a service issue.
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This is a very ambiguous post. When you say that you are having this problem, what are you doing? Please post all the steps that lead to this error. There is no way to disable the amplifier protection circuit. If it senses a short (which could be a bad speaker) then it will be activated.
The problem is the Power Switch. The switch on the STRDGF920 is very problematic. When the receiver is on very lightly move around the power switch with your finger. do not use enough pressure to turn the unit off. Just very lightly slide your finger over the switch and you will see your problem happen. I have two STRDG920 units with the same problem. One is so sensitive I can blow on the switch and it will power cycle off and on. I have called Sony and they said they do not offer a replacement part power switch. I will have to figure something out.
I have had the front, left and right channels go out over time.I have fixed all of them, and each time it has turned out to be a cold solder joint.While I love NAD and will continue to purchase there equipment, this generation is plagued with poor workmanship.
To fix the channel going out, I removed the top cover.Back cover and 2nd card from the left (looking at the receiver from the back side).This card handles all of the audio processing.I have found cold solder joints all over this board which has caused channels to suddenly go quite.I have never found a bad component.Also, I have cleaned the interconnect to be backplane (board that the audio processing board connects to) in the case of the center channel going quite.
If you have poor FM reception, the first board from the left (looking at the receiver from the back side) may have a cold solder joint on the coaxial connection for the FM antenna.
Try reseating the prologic/output board. Second one from the right (from the front of the reciever), that fixed my no sound problems on many channels. You will have to take out a few screws to remove and reseat it, and while you are at it clean the connections.
It sounds like You have a Bad output Some where and its going in to protect mode disconnect spkrs and make sure volume is Down all the way and power up,Ck your wireing for Freyed wires and shorts at the inputs and outputs
good Luck ttech
Nope. sorry to burst your bubble but your problem is pretty common on this unit. Its bad capacitors in the power supply and probably not worth repairing in a repair shop. since this is a solid state reciver, there are no user replaceable parts inside.