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Onkyo TX-DS979 lost audio output. Manual says Amp

Onkyo TX-DS979 lost audio output. Manual says Amp protected circuitry has kick in and to call Onkyo service rep. What's the fix?

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 81 Answers

SOURCE: Amp Protection Mode

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

  • 21 Answers

SOURCE: Onkyo TX-28 Receiver Output Problem

You may be confusing +/- power supply rail fuses with left and right speaker fuses.

Posted on Sep 03, 2007

SOURCE: Onkyo tx-sr800 PROTECT mode

Hold video1 and press speakers A button, it will say "clear" If the message protect appears again, then its service time.

Posted on Sep 05, 2007

  • 1 Answer

SOURCE: Onkyo receiver audio problem

I have Found two problem which cause NO AUDIO 27-07-08
jaiki39@yahoo.com

  1. 1.Failed connection between top &bottom of circuit board NCDG-6575 (Dolby --DTS) processing board.
Near & under IC Q710

2.Failed componet IC Q710 part # LC372100PT
IF you disconnet CKT board NCDG-6575
you will get audio on speaker B left & right CH only

SOLUTION have CKT board NCDG-6575 Repaired or REPLACED

Posted on Jul 28, 2008

  • 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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This site said it was free - then there is a charge? I am getting a "Protecting" message when I turn on my receiver - then it shuts off....What does this mean and what should I do?


It means the receiver senses excessive heat, or a short at its outputs. Disconnect the speaker wires and see if that helps. If not, get it to a Tech. If it turns on, figure out which speaker path(s) was causing the problem and resolve it.

The manual.

http://www.retrevo.com/support/Onkyo-TX-SR601-Receivers-manual/id/365ag212/t/2/

Power shuts off immediately after power on.

• Amplifier protection circuitry is activated. Remove the power cord from the outlet immediately. Contact your Onkyo service center.

Jan 13, 2011 | Onkyo TX-SR601 Receiver

7 Answers

Onkyo TX-NR801


is the mute indicater displated on the screen.

Jul 12, 2008 | Onkyo TX-NR801 Receiver

1 Answer

I have an Onkyo TX-DS747 & everytime I turn the receiver on the speaker outputs a switch keeps turning on & off for about an hr before it rectify it's self. Is there a way to correct this issue??...


What it sounds like you are describing is the protection relay turning on then imediately turning off for the time period mentioned. That would indicate a possible short in the circuitry. Probably a capacitor that is intermittant or even a transistor about ready to fail. This is probably not something you can look for if you are not an electronic tech. Find a reputable shop and get it fixed before it quits and does more damage. Let me know how you make out.

hardrocko

Feb 03, 2010 | Onkyo TX-DS787 Receiver

1 Answer

I have an ONKYO TX-SV717Pro amp. recently I lost


It could be that you lost the power supply to the surround amp IC or the Ic is defective. It should be mounted on a circuit board attached to the heatsink. Look for poor solder connections first. I don't recall the specifics of this model, but the surround amp IC should be easily located.

Update this with your progress and I'll try to locate the service manual in the meantime.

Dan

Oct 22, 2009 | Onkyo M-282 2-Channel Amplifier

2 Answers

Onkyo TX-DS777 goes straight to protection mode


Hello.You have shorted audio outputs. One of your channels has shorted output transistors. If your unit uses output ICs then one of them is shorted. Both types ( individual transistors or ICs ) are located on the large finned heat sink. The parts are available from http:\\www.tritronicsinc.com. good luck

barneyluc

Oct 19, 2008 | Onkyo TX-DS777

2 Answers

Onkio receiver


The output transistors should be replaced in pairs. Also, It may not be just the output transistors that are defective. If you have no experience with these types of repairs, I would suggest that you bring the unit to a service shop. The outputs will run about $15-$25 per pair.

Dan

Aug 29, 2008 | Onkyo TX-SR601 Receiver

1 Answer

Onkyo TX-SR500 5.1 Receiver Last night


1-disconnect subwoofer first and test-and then disconnect surround speakers-and front speaker after-and later center speaker.ever time you disconnect you check the operation until you find the bad one(or two)which make the problem change its cable first and then change speaker itself.if all above failed contact the service center.

Jul 04, 2008 | Onkyo Audio Players & Recorders

2 Answers

No power


My receiver has a similar problem. So far I have found a pair of output transistors fried shorted E to B to C (Q6051 and Q6061) and the associated ceramic current limiting resistor array (R6101) failed open. These bad components will definitely be sensed by the protection circuitry as an overload condition. I ordered some replacement transistors from Mouser (2STC4467 and 2STA1694) and the resistor (RSS2WK-0.22 ) from Encompass.

https://www.encompassparts.com/

I will let you know if this corrects the problem once the parts are installed. I also got a service manual from www.user-manuals.com which helps a lot.

May 27, 2008 | Onkyo TX-SR500 Receiver

1 Answer

Onkyo TX-DS838 Issues


The problem here is that the output amplifier section has a problem. This is detected internally and the system shuts down in a "protect" mode. The output section really only kicks in when you attempt to bring up the volume. Another possibility is a problem in the "front end" where DC current is being passed to the amp section. Without takeing measurements, it is difficult to determine the exact cause. This should be a relatively stright-forward repair for a service shop and should cost about $20-$40 in parts plus the local labor charge.
Dan

Dec 23, 2007 | Onkyo TX-DS838 Receiver

1 Answer

Amp Protection Mode


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

Dec 13, 2006 | Onkyo TX-SR503 Receiver

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