Question about Sony STR-DE325 Receiver
Hello I have a 4-5 year old Sony STR-DE325 Receiver. Has been running great. Switched speakers for an outside party and may have cranked it up too high and now starts up, say on tuner, and switches to a blinking "PROTECT" mode. Unplugged it for several days but still goes to PROTECT. Speakers that were switched to, were a smaller amperage than the originals. Checking out the owner's manual I can't seem to find any indication towards a fuse but I suspect there may be one? Thanks, Jiffer
You are right! There's a good chance you BLEW IT UP, so to speak! But there is hope... [Note: There are no fuses on this unit, inside or out. There IS, however, an internal overload protection system designed to prevent permanent damage. With no disrespect Sony, it is not a very ample system. That is, it simply doesn't do its job very well. However, there is a CHANCE a reputable service center can reset it, but don't get your hopes up.] But before you take it in for service, it is also a REMOTE possibility you will get lucky doing one of the following: FIRST, what happens when you DISCONNECT ALL OF THE SPEAKERS? Does it still go into Protect mode? (If it does, it's time for service.) If not, then you might simply have a bad speaker (rare); a shorted wire; or improper speaker impedence: The NEXT STEP, then, is to make certain ALL of your speakers have an IMPEDENCE of 8 OHMS. Virtually all speakers of even modest quality will include this specification on a label on the back of the speaker. You CANNOT run more than (2) TWO speakers with 4 OHMs impedence on ANY amplifier (technical discussion too long!) Finally, in switching your speakers around for the party, and then again afterwards, you may have crossed a wire; ran a staple through one; or have bare wires touching at one (or more) of the speakers. Check first for bare wires touching one another. This would put your Sony into Protect mode the instant you turn it on. If everything looks okay at the speakers, then reconnect them to the receiver, and test them ONE AT A TIME. For example, reconnect the left front speaker, test the system; THEN add the right front, test the system, and so on, ADDING one more speaker each time - FIRST MAKING SURE EACH OF THEM HAS AN IMPEDENCE OF AT LEAST 8 OHMS! IF there is a short (or bad speaker) this will help isolate it. Assuming the unit powers-up without speakers, then one of these simple fixes might prove worthwhile! GOOD LUCK!
Posted on Jul 18, 2007
Hi all i have the same receiver from sony so my story is
When i turn my receiver on and one off the 4 relay's dont turn on, and the same time on the display is showing
a flashing message " PROTECT" a have tried many times to hok up another speakers of many impendances but nothing no short circuit on the output and then i decided to open my amp after few hours i find a problem finaly one off the integrated circuits near the out put transistors the ic was a
upc2581v (fet driver) and the problem was a bad soldering can you belive this ? i have soldered the ic again and cut off the long legs from the ic and put together the amp and is WORK'S and the amp is made in france i thing you chek this ic in your amp's becuse the soldering off the board is very bad. hi all
Posted on Nov 26, 2008
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Posted on Jan 02, 2017
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