20 Most Recent Sony STR-DE425 Receiver Questions & Answers

Take the LG audio out (digital or analog if receiver supports) to Sony video "audio only" input. No need to plug video unless necessary.

If you do not hear the protection relay click, then replace the relay.

Check if the protection relay are good and connecting.

Probably took out the output transistors for that channel. Is the unit dead now? Usually in these models, if the outputs go, it takes out the main power fuse.

You have shorted output transistors in the amp that need to be replaced.

The most common problem found on FixYa for Audio Video Receiver's is:

My receiver say's "Protect" or turns on then off. What's wrong? Seven times out of ten it is a shorted speaker or speaker wire. To determine your exact problem, the first step is to disconnect all speaker wires "at your receiver" Next: Turn the receiver back on. If your receiver still says "protect" or turns off, it needs to be serviced. If your receiver stays on; reconnect your speakers one at a time and power back up after each speaker. You may find that after reconnecting all speaker wires it works! Most commonly the small braids of wire from the + to the - have touched and have caused the problem. In some instances, you noticed the problem only when turning the volume up. either way, make sure the exposed wires to your receiver are no longer than 1/2" long and are completely under the screw down terminal or slide in. When you've found the wire or speaker with the problem, your receiver will go back into "protect" At this point, disconnect the wire from the speaker at the speaker that may be causing the problem then test again.* Note* Make sure speaker wires do Not touch each other as this Will cause a short! If you turn the receiver back on and it stays on, you now know the problem is in your speaker itself. To test your speaker, you will need a multimeter. Set it to ohms resistance and touch the speaker terminals, if there is a short internally the meter will read "1......" If it's an analog meter, it will peg to the right. There's your problem. Now, within any speaker there are quite a few possibilities as to what could be causing the problem. Most common is a blown coil and the speaker needs to be replaced. Some speakers have internal crossovers (usually floor standing speakers) and may have a shorted or burnt board (usually very visible brown burn marks on the board) and can possibly be repaired if your handy with a soldering iron. Now, if you disconnect the speaker wire at the speaker and it still says "protect" Check your wire for the obvious cut or nail thru the wire if possible. If your system has wiring that runs behind walls, you may need to use your meter again. Disconnect the wire at both ends, keep the ends separated, put your meter on ohms resistance and touch probes to the + and - wires at one side. If the meter pegs to the right or reads "1...." the wire is shorted and needs to be replaced or repaired at the short. Hope this helps.

Toggling power on and off is NOT a good idea, nor does it ever really fix anything.

Does the TV affect the receiver even if you have other sources selected or speakers disabled?

Establish if the TV connection or lack of it affects the problem by disconnecting one cable at a time (I have no idea what cables you use) to see if the self-protection is caused when the TV is turned On. Prove that each cable is or is not involved with glitching the receiver. If it still pops after the TV is completely floated from the receiver, consider a power surge as the culprit. Maybe you need to place the receiver on a power circuit that isn't shared with the TV.

Oh, btw, you're not drawing power from the convenience outlets on the reciver for anything that sucks up a lot of juice, are you?

Register and download the manual for free at retrevo.com http://www.retrevo.com/support/Sony-STR-DE405-Receivers-manual/id/387bh944/t/2/ and refer to the manual that should have come with your unnamed subwoofer.

The dm port Can't you just pull the audio from the iPod from its analog headphone jack with an adapter? They're common and cheap.

It sounds like the output ic's may have failed, because of the complexity of system I would have a professional come and look at the unit for an evaluation, chances are he will need to take it back to the shop for service.

audio amplifiers Ic´sdamaged need to be replaced