Question about Audio Players & Recorders

Onkyo a-sv210 reciever repair

Amp says "protected" after power up. already changed fuse

not fixed Jan 12, 2008

anytime I power up the word protect shows I have tried unplug the entire unit , tried holding videio 1 as I pushed the A button and have tried different componants still the same thing Help.
jimmy16 Feb 10, 2008

amp says "protected" after power up.
already changed fuse and still not working please let me know how to fix it

5 Related Answers

Anonymous

81 Answers

no, your output transistors maybe 2 of them are gone or the small power supply that feeds the other circuitry has become defective.

Posted on Dec 15, 2006

Scott Frye

1175 Answers

SOURCE: A-SV210 on protect mode

In a generic sense I would check all the speakers to make sure theyre connected at BOTH ends.

I'm not sure who makes your receiver but if I did, I might be able to give more input.

Posted on Mar 18, 2008

Francisco Mauricio G

1550 Answers

SOURCE: Onkyo Tx-v940 Receiver/Amplifier Protection Mode

Audio amplifier IC's damaged you need to change it.Good luck

Posted on Jun 11, 2008

Jacques Marin

566 Answers

SOURCE: my onkyo receiver (tx8511) keeps going to protect

Hi there
To answer your question;
Your amplifier goes into protect mode when it detects a fault or condition that could damage the speakers and/or the output stage.
Often caused by shorted outputs.
Although this does`nt tell you much on how to fix this problem, the best help i can give you at this point is to tell you to have it looked at by a repair shop.
Hope this help good luck

Posted on Apr 18, 2010

Anonymous

1 Answer

SOURCE: How do I reset from the amp protect mode Onkyo receiver TX-SR600?

How do I reset my amp / receiver from protect mode ?

Posted on Jan 29, 2011

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I'm sorta familiar with those kind of amps, lots have built in fuses. My guess is a fuse went

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My reciever went to protect mode after my speaker wires touched. I removed all cables and power for an hour but stays in protect mode. I also changed 2 15 amp fuses inside but nothing unless I take fuses...

Yes, you can do this easily.
Perform the following steps
(1)Plug your amp to AC outlet.
(2)Switch it on.
(3)observe time taken for switching off.
(4)immediate to shut down over current protect(5)3 seconds to shut down DC protect.
If over-current protect do the
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(O)unplug the amp.
(1)download NR806 service manual.
(2)open the amp metal cover.
(3)measure 7 large white resistors resistance loacated next to power transistors mounted on a large heat sink with black probe touching the middle pin and red probe to first/left or third/right pin.
(4)If this 3 Pins large white colour 0.22ohm x 2 resistor is open with infinity ohms ,
(5)replace it and jot down this channel for example left surround faulty. Usually only 1 channel went faulty.
(6)the two large power transistors next to this white resistor 0.22 ohms x2 should also be replaced.
(7)plug the amp
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(9)if ok, troubleshooting get done
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I replaced an inline power fuse inside of my Onkyo reciever, power returned and now I have no output to main speakers and the unit flashes back and fourth between regular display and protect. ?????

THE GOAL HEAR IS TO DETERMINE IF THE INSTALLATION IS CAUSING YOUR PROTECTION FAULT OR IS IT THE RECEIVER ITSELF HAVING INTERNAL DAMAGE. REMOVE THE RCA INPUTS AND DISCONNECT THE SPEAKERS, THEN POWER THE AMPLIFIER UP WITH THIS NO INPUT, NO SPEAKER LOAD CONDITION. IF IT STILL GOES INTO PROTECTION, THEN THE RECEIVER WILL NEED TO BE SERVICED, AS YOU HAVE TOTALLY SIMULATED A BENCHED CONDITION THAT IS TOTALLY INDEPENDENT OF YOUR INSTALLATION. MOST TIMES, THE RECEIVE WILL GO INTO PROTECTION WHEN IT SEES AN EXCESSIVE LOAD WHEN TURNING UP THE VOLUME, WHICH IS USUALLY CAUSED BY TOO MANY SPEAKERS OR DAMAGED SPEAKERS, BUT IF NO SPEAKERS CONNECTED, THEN IT IS USUALLY BECAUSE THE RECEIVER SEES AN EXCESSIVE LOAD DUE TO ITS OUTPUT SECTION BEING DAMAGED. IN ANY CASE, ONCE REPAIRED, YOU MUST CHECK YOUR SPEAKERS FOR BURNED VOICE-COILS, WHICH WILL IMPOSE AN EXCESSIVE LOAD TO THE AMPLIFIER AND CAN CAUSE IT TO FAIL AGAIN. ALSO, BE CAREFUL ABOUT HOW MANY TIMES YOU KEEP TURNING IT ON OR OFF, AS AT LEAST ONE TIME, THE PROTECTION CIRCUIT DID NOT DETECT IT IN TIME AND THAT IS WHY THE FUSE BLEW. ALSO, DO NO REPLACE THE FUSE WITH A LARGER FUSE. YOU DO NOT WANT TO SEE THE POWER SUPPLY ALSO GET DAMAGED, AS THIS WILL DEFINITELY ADD TO THE COST OF THE REPAIR. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE.....V

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Disconnect both speakers and turn on the amplifier. Does it still give the error message? If it does, your amp is blown. If it does not, carefully inspect your speaker wires and their connection. Make sure all looks good and reconnect the speakers and try it again. Still get the error message? You likely have a problem in your speaker cabinet(s).

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It may be as simple as a single strand of copper wire shorting between the positive and negative terminals of a connection.

:)

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