Question about Sony STR-DE915

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I have a Sony STR DE915 amp. It will not power up. I checked the internal fuse (it's OK). Power button has dislodged and may be broken. Am looking for disassembly instructions (not schematic diagr

Unit worked a week ago, then would not start again. No change to system. No crossed wires. Unit is now partially dissembled, but I'm hesitant to pull boards off without knowing proper order or precautions. The power button has become dislodged and may be the problem.

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  • Contributor
  • 17 Answers

Simple, if you are not confident in your ablility to fix the problem by dissasembling the boards then by all means, take it to a repair facility.

Posted on Apr 22, 2014

Testimonial: "I was able to get down to the power button, and repaired it. Unfortunately, the unit still doesn't power up. At this point, I'm not afraid to tear into the thing, but don't really know where to start looking."

  • Ray Simmons Apr 24, 2014

    If no fuses are blown coming off the power supply you need to check the power supply itself for the voltages needed to run the unit. you can still have a short or a missing voltage on your outputs shutting down the unit without blowing the fuse. It can get very in depth troubleshooting. You should take it to a technician who is good with sony products.

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6 Suggested Answers

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Sony STR DB-930 Receiver jumping into protector mode

I went through the amp/receiver and used small star washers on all the grounding screws I could find including the one securing the transformer, cleaned dust off all circuit boards, checked output transistors and fuses, all OK.

Re Assembled unit and it worked OK.

I will buy a fan and fan it to avoid sourcing heatsinks for the previusly suggested IC's.

Thanks for the technical help, sure solved my problem.

Regards

Darryl.

Posted on Mar 13, 2008

tech48
  • 624 Answers

SOURCE: STR-DE525 Blown fuse

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

Posted on Sep 16, 2008

  • 5 Answers

SOURCE: sony str-de845 Powers up, relay clicks, fuses BLOW!

This condition, may be produced by defective components (Q506, Q507). you can remove those transistor, replace the fuses, power-on and wait for relays click. if the fuses not blown again, them replace both transistor.

Posted on Mar 19, 2009

  • 167 Answers

SOURCE: Sony STR-D715 Protect Mode

Hello,
This is a common problem...
It is in fact a bad power-amp module.
I have repaired quite a few of these receivers by replacing it.
The module is inexpensive. I Googled the Part number and found several sources for it.

Good luck!

Posted on Oct 10, 2009

  • 1 Answer

SOURCE: Sony STR-V333ES repeatedly clicks

You most likely have a short in one of your speaker wires (+ and - are touching somewhere) causing the receiver to enter a protect mode "Click!". Disconnect all speaker wires then connect and test each one at a time to find the culprit. I've seen this happen with speaker wire or a subwoofer cable that is too small of a gauge. Hope that helps.

Posted on Jan 07, 2010

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1 Answer

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-SS.

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if your preferring to protect light your either, pushing to much power, or a wire could be touching along the line. Check all your wiring even the ones behind the receiver that could be your problem

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