20 Most Recent Sony STR-DE525 Questions & Answers

Disconnect all of your Speaker leads and see if it still does that when Powering on, If not then one of your speakers/Wires has a direct short. you can test the speakers/Wires with a multi meter you can tell as they should have 6-16 ohm resistance. If it still does this with no speaker wires connected then you have an internal short and should take it to a repair center or local audio/video tech.

try resoldering all open circuits then on power supply section check the electrolytic. capacitors. which are 80 volts, 10000microfarads also check regulators which 5&12volts (la7805&la7812) and I suppose things will workout

You mos likely have a problem in the amp section that is causing the unit to go into protect. Probably shorted output transistors and some burnt resistors.

What's it doing that you need fuses?

as long as it is properly insulated , or use a fuse holderuse no more than 5A

It says 'PROTECT' It has sensed a fault with either the speaker wires shorted or an internal failure. Remove all speaker wires and try again. If it still says protect, then the problem is internal. Service shop repair.

check to see that the dvd player sound setting is set to BITSTREAM and not pcm. pcm is only 2 channel. Then check to see that the volume setting for the rear speakers in dvd is up, most sony receivers hold different settings for different applications, (vid 1, sat/tv, dvd) and remember when you switch between them. Rear surround should be up all the way , I believe for your receiver that is +10 also make sure you enable the rear speakers in the setup menu for surround sound.

Do you hear any clicks? If not, the standby transformer or related circuitry is bad. If you hear 1 relay click...the audio output section is most likely the problem. The first click you hear is the main power relay...and should see display.. the second relay click is the protection circuit relay engaging to let audio to your speakers...if the second click is not heard (it should occur in 3 to 5 seconds) there are shorted output transistors or a shorted output IC trying to blow your speakers with 50 to 75 volts dc. The protection circuit monitors the speaker lines for voltage. They should always read milli-volts only...not even 1 volt.Anyway, good luck

It is common to have a short circuit on the back panel. Check if there is any stray speaker wiring touching anything, including the chassis, other than the binding post it is supposed to be firmly connected to. Also check for any loose plugs or plugs from another electronic component that just might be touching the receiver anywhere. Then, hold down the power button of the receiver until it "clicks." If that doesn't solve the problem then it needs service.

Q558 = 2SA988A
R552 = 120K
R577 = 6K2
voilà!

Not very likely that you can fix it yourself with little electronic skills. You fried the channel you had it connected to. It will require the replacement of a lot of parts in the amplifer circuit. When a channel blows it has several transistors, several resistors, sometimes a couple of diodes and capacitors, and sometimes with the sony amplifers a pre-amp driver IC that will need to be replaced. You will require a multi-meter to determain which parts must be replaced, a soldering iron, some solder, and some solder wick to remove the solder from any bad components that must be replaced.

Any time you connect more than 1 speaker to a channel you risk over-heating that channel and shorting out some components. There are no amplifiers that are designed for more than 1 speaker per channel. I have repaired many sony recievers, including the one you have on several occasions, in the 18 years of working as an audio repair technician. With 2 speakers on the same channel you will draw double the amount of current thru the amp circuit than it was designed for. With 3 speakers on the same channel you will draw triple the amount of current and so on, and so on. I am really surprised that it played for more than just a few seconds with that many speakers on one channel. It must have been in really great shape to start with. I am sorry you did not know this before your party, it would have saved you some money.

Now the good news!

It should be able to be repaired. If all the speakers you had connected were really all on just one channel, you should have only one channel bad. This is a nice receiver as I am sure you must know, since you own it. It is worth getting repaired. As I have stated, I fix these for a living and I would expect the repair cost to be around $125 to $150 if it was taken to the service center that I work at. I can not be certain what another shop would charge, but this is a pretty good estimate considering I do not have it right in front of me to troubleshoot. Some shops are more honest than others, and there is always the chance that there may be more damage than what I would anticipate, or even less damage than I would expect resulting in a cheaper repair.

If you want to take a crack at fixing it yourself I would be happy to guide you thru it, but you would need the proper tools as I stated above.

I hope that you have found this information helpful, and if so, a rating of "FixYa!" would be appropriate and very much appreciated. After all, it is the only reward we get for offering people like yourself this free information and help.

Let me know if you want to try and fix it yourself, or if you have any other questions I can help you with.

Dave

nothing is connected at this time no speakers or in puts.....
posible component failure???? any common check points..this thing is pretty webbed with them

Hi,
Download service manual of STR-DE525 here and fix your receiver.
Must download all 4 files at web site.
Need further help, let me know.

the reciever you have is a dolby prolodgic system. the rear channel is monoral, that is that both rear speackers have the same infomation to it (and not much of it). the new suround sound systems are dolby digital/DTS suround sound. there is a major differance to the sound and the information presented. all channels are discreat and information provided by you digital outputs of your equipment provide the channel info (tv via optical digital out, DVD also optial or coaxal digital out, cable box also optical.)

check/replace your speaker wires. If a wire came loose, it will go into "protect" mode and shut down, to protect from a short circuit.