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Sony str dh520

Fuse keeps blowing how many 8a 125v fuses does it take?

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If it's blowing the fuse, then there are probably shorted output transistors in the amp that need to be replaced.

Posted on Jul 10, 2013

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SOURCE: Sony STR-DE945 8A 125v fuses

Check HomeDepot they have 7amp , maybe your store has 8amp.

Posted on Dec 18, 2009

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How do I adjust the treble and bass on sony str-dh520?


See EQ Mode on page 59 of the owners manual to set the bass and treble for the front speakers, presumably for 2 channel mode. For multi-channel mode there are several pre-programmed audio modes listed starting on page 43 and music mode starting on page 44.
https://docs.sony.com/release/STRDH520.pdf

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STR-DH520 Sony av receiver , Protect sign keeps coming on and I have no wires connected at all! How can I fix ??


There is most likely a short in the amp that needs to be repaired. Probably a pair of shroted output transistors as well as a few resistors will need to be replaced.

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What would cause new fuse to blow when powering on (Sony STR-DN1030 Receiver).


Look in the circuit board area where the power cord mates with it for capacitors that have bulging tops (instead of the flat tops that are normal). If you see even one, you need to replace all the large capacitors othe power supply section (normally around 5 or 6).

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Blew the fuse then i put an other one and dit it again


Check your speakers. If the impedance is lower than 8 or higher than 16 Ohms (symbol Omega), DON'T USE IT WITH YOUR DEVICE !!!

Anyway, do the following test : unplug all your speakers from the back panel, change the fuse, and turn the Sony on. If nothing happens, you have a problem with one of your speakers.

So you can try to re-plug your speakers (plug with your device off) one by one to see wich one blow the fuse, or open all of them to detect an eventual short-circuit.

Hope this was helpful

Apr 15, 2014 | Sony STR-DH520 Receiver,7.1Ch,3D,100WCh,...

1 Answer

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...


Yes it can be fixed you have a short in one of the output channels. Probably needs two transistors. If you keep putting fuses in it will need more. You are looking at $100 to $125 for the repair.

Feb 12, 2011 | Sony STR-DE835 Receiver

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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.

Mar 02, 2010 | Sony STR-DE135 Receiver

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Sony STR-DE945 8A 125v fuses


Check HomeDepot they have 7amp , maybe your store has 8amp.

Dec 18, 2009 | Sony STR-DE945 Receiver

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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.

Mar 05, 2009 | Sony STR-DE845 Receiver

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Blown Fuse, needs fix'n


You CAN open the unit (keep in mind that even unpluged there is still voltage runing through the system, so.... dont fry) and you will notice, if the face of the unit is towards you you will see on the left hand side a power supply board, the fuse is on that board, and it is a tube fuse, 125V 8A. Most stores do not carry the 125V version anymore, but will carry a 250V. This is okay to use where the voltage is not the main purpose of the fuse.

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