Question about Sony STR-DE197 Receiver

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Sony STR-DE197 Dead

My Sony STR-DE197 stopped turning on. I opened it up and found one of the two 5A 125V fuses blown (F901). I replaced the fuse and re-powered without any connections. The fuse immediately blew again. No visible signs of other damaged components. Any thought on what could be shorted out?

The unique thing about this amplifier is that I use it to power a whole house audio transformer (Niles Audio Transformer). This is intended to match output impedance but I'm guessing it still pulls more power than typical applications.

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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

SOURCE: Blows main fuse when power is turned on

Shorted power supply/module is most likely problem.

Posted on May 27, 2009

dunnbiker
  • 8546 Answers

SOURCE: I have the same problem. The fuse blows every time

There is usually one or two normal clicks on power-up. A self-protection relay activates after a short delay for circuit and power stabilization plus some internal cheking for shorts and thermal issues.

If it keeps blowing fuses you are stressing it a bit more every time you feed it another one. I'd get it in to a Pro for repair.

Posted on Mar 02, 2010

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I opened my amplifer top and saw fuse 3.6 amp 125v blown up. I purchased fuse from fry's 3.6 amp 125/250v and installed it get blown right away. there is no power or light on the screen window...help


Hello there, usually replacing fuses are not the solution to most problems. Basically what you have to do is first locate the source of power to the fuse and identify why the power supply to the fuse is as high as it is and address the reason for such flow before replacing the fuse. Depending on what happened to cause the problem initially you might have to replace more than a fuse and probably a diode and a conductor which supply power to the fuse as they might have lost the ability to step down the power which flows to the fuse. Check the components which supply the fuse to determine where exactly the surge in power is coming from.
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Failure of the the power source. To see if it's fixable the receiver will have to be opened and the power board tested . This job requires at least a basic experience in electronics - if you don't posses it all you can do is to look for a burned fuse or damaged capacitors. For them follow this
http://www.youtube.com/watch?v=YCSNWi3UHf4

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Blown 2 8a 125v fuses, replaced them and blown them again. I used this stereo for 10 years without any problems Can this be fixed, I threw away the last one with the same problem. The tech said it was...


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I have the same problem. The fuse blows every time I plug the Sony STR-DE135 into the wall. I did not find the F901 at Radio Shack, so I bought a fast acting 5 Amp 125V Fuse at the Hardware store. It blew...


There is usually one or two normal clicks on power-up. A self-protection relay activates after a short delay for circuit and power stabilization plus some internal cheking for shorts and thermal issues.

If it keeps blowing fuses you are stressing it a bit more every time you feed it another one. I'd get it in to a Pro for repair.

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Hello, I need help with my sony str-de197 receiver. Then I hit power on button, there is a click sound inside the box, but nothing happens, there is nothing on display too. I have checked 2 fuse's, it's...


It sounds like the switch might be OK mechanically but not electrically. Have a look to see if you can check the connections on the switch. Perhaps there is a broken or loose or bad solder joint.

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Blows main fuse when power is turned on


Shorted power supply/module is most likely problem.

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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.

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