Question about Sony DAV-C770 System

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Protection message appears on screen

HCD-C770
S-Master
5.1 Digital Amp

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Speaker protection circuit malfunctioning or turnd on for protecting the speakers from faulty output section.
give it to repair proffesional or we will try together to repair it.
are you technicali sound .
(electronics)

nuwan.......?

Posted on Jan 12, 2009

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Sony hcd-ec99i i have no sound from the speakers at all. I am not getting the protect message. please help


Check the simple stuff first

Is it muted?

Is the source selected sending signal (radio staion broadcasting, cd playing, ipod all the way ect)

Try doing some basic troubleshooting like,

see if all sources available yield the same result (TV, Radio, CD, Ipod, Aux jack)

When you turn the volume all the way up, do you hear an audible hiss from the speakers?(or use a test tone) If so, your amp is working and the problem is, your unit is not sending any signal to it.

If possible hook up your speakers to another system to rule them out, however I doubt that is your problem.

Here is sony's recommendation and a review video

Let me know what you get

SONY eSupport How to troubleshoot if there is no sound or intermittent...



Feb 03, 2014 | Audio Players & Recorders

1 Answer

Sony surround sound


Protect on a sony usually means there is a problem in the amp section. On that model, it would probably need to have the entire amp pcb replaced.

Jun 11, 2013 | Audio Players & Recorders

1 Answer

My Sony HCD-EC909iP receiver won't turn on and the


Usually that is caused by a bad amp IC. Normally on this model, you would just replace the entire main pcb.

May 02, 2013 | Audio Players & Recorders

1 Answer

My sony HCD CPX1 serial n.º 7041707 appears to have a problem it appears a message saying "power push protect". It resolves when i turn off, but the appears again. What should i do? Take...


Reinitialisation.....waiting...switch o/off....waiting and in 5 Minutes it starts again..but sometimes I'll be angry and I want to through it from the window.

Jan 05, 2011 | Sony CMT-CPX1 CD Shelf System

1 Answer

When I turn on my Home Theater Sony Model hcd-hdx576wf this message appears, "protector, push power". what I can do?


Follow the steps below to troubleshoot if the word PROTECT or PROTECTOR is flashing on the A/V receivers display.
1. Check the speaker wires and speakers for proper connections.
2. Reduce the volume level. IMPORTANT: If the receiver is played back at maximum volume level it may enter the protect mode. Maximum volume listening will cause the receiver to run very hot and may drain the output capacitors.
3. Disable the surround sound option if both the A and B speakers are being used simultaneously.
4. Ensure the top of the receiver has proper ventilation to keep it from overheating.
5. If the message only occurs when using a DVD player, the sampling frequency may be set too high. IMPORTANT: Some receivers provide compatibility with the higher sampling frequencies through alternate connections. Consult the owners manual for specific information.
6. Unplug the AC power cord for about 1 to 2 hours to reset the output transformers.

Dec 17, 2010 | Sony Televison & Video

1 Answer

Sony midi Hifi switching itself off


These digital amps are very prone to blow if the speaker wires are shorted so Sony appear to have put in a protection system that mutes the amp when this happens. You have to unplug the amp for a minute till the light goes off, make sure no speaker wires are touching each other and then it should work ok. I found the same problem with one I bought 2nd hand.

Feb 03, 2010 | Sony Audio Players & Recorders

1 Answer

Sony HCD-BC150 As soon as I turn it on, it shuts


Change the audio amplifier IC are on short circuit and that´s the cause your device goes to protect mode

Aug 11, 2009 | Sony DAV-BC150 System

2 Answers

Write protect message appears on screen


Sounds as if the memory card may be corrupted. In order to remove the write protect, make sure you have downloaded and saved all of the images from the memory card to your computer and then having the card in the camera you will need to run the format option and this will permanently remove the write protect as well as all of the images from the card.
The card should be able to be used again after the write protect is removed.

Dec 14, 2008 | Olympus MJU 400 Digital Camera

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