Question about Onkyo TX-SV525 Receiver

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Reads PROTECT on the display of my Onkyo TX-SV525 ???

I have traced the amplifier circuit and found one shorted final transistor with a burned resistor associated with the transistor.The bad transistor was the left rear channel.I replaced both rear channel transistors with a new matched set and the burned resistor.I found no other problems in the circuit.I powered it up and the display reads PROTECT,with no output.I have a service manual,but I can find nothing about the protection circuit....

Posted by Anonymous on

  • hggjyhg Nov 09, 2007

    how do you fix it

  • Anonymous Mar 16, 2014

    My Onkyo TX-SV525 power cord is missing. Where can I find replacement? Anyone got that part?

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1 Answer

Anonymous

HOWDY,         NOW YOU COULD TRY THIS ONE: POWER THE RECEIVER UP , THEN PUSH&HOLD !THE VIDEO 1 BUTTON, THEN TURN THE PIECE IN THE OFF (STANDBY MODE ) ,IT WILL SAY "CLEAR SO IT SHOULD BE BACK TO IT,S ORIGINAL FACTORY SPECIFICATION,S.

SUCCES !                              AMSTERDAMCOWBOY-HOLLAND-NOW FLORIDA! 4-EVER

Posted on Oct 23, 2007

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Where are the fuses located in onkyontx-sv525- only found 1 at power in
If you pulled the cover and only see one fuse, and if it is not blown, then you need to search deeper for the problem. All replaceable fuses on the main board are viewable.

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The manual is here:

http://www.retrevo.com/s/Onkyo-TX-SV525-Receivers-review-manual/id/365bh226/t/1-2/

Power it OFF before handling any wiring.

You could verify if any speaker wires being shorted is the problem by just disconnecting all of them and trying to power it up. If it fails to power up, it's sick and needs a hands-on tech to look at it.

If you don't actually SEE the problem while disconnecting the speakers, but the receiver DOES come on, try reattaching one at a time until you either have found the offending speaker/wire combination or you have success in turning it on and using it.

Speakers can be shorted, too. So if you locate a channel giving you trouble, say, front right, you could swap a different speaker or wire set into its place to prove if it's external or internal to the receiver.

Going forward, make sure you don't run the unit too loudly and give it plenty of room for cooling ventilation.

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Hello

maybe you have defective power transistor output and this is shorted, or the problem is in the power section like shorted diode shorted capacitors or open circuit may cause this, and the STK IC if shorted you got protect warning..

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your tx-sv525 audio video control tuner amp is has full analog connections therefore it is analog.

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Did the amp just not power up one day or did it stop working while you were listening to it? Finally, do you have teenage kids who might have been listening to your receiver and would have "neglected" to tell you that after listening to their music it suddenly stopped working?

It could be an internal fuse but chances are its something that requires a technician to repair (like the output transistors).

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Ve a http://audio.manualsonline.com,Suerte.

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Look under the wide ribbon cable going to the front panel. There is a cluster of components on the main board that make 12V and 6V power for different things. There is a pair of 12 ohm and a 1 ohm resistor. These run very hot and over time will take out the motherboard underneath. If these resistors disconnect the unit will cycle on and off rapidly. I found this out when I was replacing the resistors and repairing the circuit board.

 

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