Question about Sony STR-DA777ES 6.1 Channels Receiver

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HOW TO FIX STR-DA777ES WHEN IN PROTECTION MODE

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Posted on Jan 02, 2017

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SOURCE: Sony "Protection" mode - STR-DE725

My sony used to do that to umm cant remember the model but yeh i could play it at low volume but as soon as i turned it up it would start clicking and telling me to turn of the power...

I resolved it by checking every cord connected to it, it turned out that because I connected two speaker cables together i didnt seal it properly and they were touching this was making it go into protetion mode.

Posted on Jun 10, 2008

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My Sony str de335 is in protection mode speakers are unhooked how do I get it out of protection mode?


if you disconnected everything and it still goes into protect, the most likely there is a damaged amp channel that will need to be repaired.

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Look for any bulging on metal capacitors. As they age they can fail, but won't show it until power is stopped for a time. Then when you try to power up the system the fault shows itself Replace all that look that way

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Resetting probably won't fix it, Sounds like it needs output transistors and some resistors and/or fuses

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Sony str-d715 flasses protector


Protet mode is a special diagnostic mode that starts when a fault is detected.

When in protection mode the unit is prevented from starting by protection circuit, so to prevent further damage.

Check the speakers and speakers wiring, a contact in speaker wires, or faulty speakers can send the unit in protection.

Try unplugging power cable for one hour or so. then connect cable back and see if you get rid of protect state. Sometimes accumulation of electrostatic charges inside circuit capacitors can kick in protect mode. In that case unplugging the unit from main for some times can get rid of electrostatic charges, and reset circuits by draining power completely.
If that was the problem, you will not get Protect when plugging back power cable.

If you do all the above and still get Protect, then there is a real fault.

In that case the unit may be disassembled and tested to find the fault.

If that is the case I suggest contacting the manufacturer at the number listed on the owners manual, or asking a quote on repair to a local technician.

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Check to see if it says LINE OUT - if it does try that. Let me know if it works.

Mar 28, 2009 | Sony STR-DA777ES 6.1 Channels Receiver

1 Answer

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I know I'm 18 months late answering your question, but unfortunately I have the same problem. My son kept shutting my on and off same as your daughter. It blew the amp board that obviously powers the amps. Sad news is Sony stopped making the board, so there is no fix. Really bites, I loved that receiver!

Jul 29, 2008 | Sony STR-DA777ES 6.1 Channels Receiver

1 Answer

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My sony used to do that to umm cant remember the model but yeh i could play it at low volume but as soon as i turned it up it would start clicking and telling me to turn of the power...

I resolved it by checking every cord connected to it, it turned out that because I connected two speaker cables together i didnt seal it properly and they were touching this was making it go into protetion mode.

Nov 25, 2007 | Sony STR-DE725

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