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Sony STR-DE635 Protector Mode

You said the capacitors are fried, understood. Is this something worth fixing or would I be better off just starting with a new receiver? I am looking into another receiver regardless but wanted this for a second set up. Thoughts?

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  • nayrmr9 Jan 04, 2009

    Thanks for the advice.

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With this receiver it is cheaper to buy a new one. But instead of throwing it out I recommend that you list it for sell as is for parts. Keep the landfill free or ewaste and all. Sorry to bear the bad news.

Posted on Jan 04, 2009

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2 Answers

Where can I get Manual for Sony STR-DE635


Sony has the user manual for the STR-DE635 here: https://docs.sony.com/release/STRDE635.PDF .

I hope this helps.

Cindy Wells

Feb 04, 2018 | Sony Audio Players & Recorders

2 Answers

Protector mode


try resoldering all open circuits then on power supply section check the electrolytic. capacitors. which are 80 volts, 10000microfarads also check regulators which 5&12volts (la7805&la7812) and I suppose things will workout

Nov 16, 2009 | Sony STR-DE525

1 Answer

Sony STR-DE635, Sound from left surround speaker but not right


first turn the actual volume up on that channel on the reciver then make sure your speaker wires in the rear are using the same lenght each

May 18, 2009 | Sony STR-DE635 Receiver

1 Answer

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.

May 03, 2009 | Sony STR-D700SS Shelf System

1 Answer

I have a Sony STR-DE635. It has a switch on the front for speakers A, B, and A+B. Normal. When I am on speaker A only, it works fine. B does not work. A+B works, but only through the A speakers. Now,...


Check for bad solder connections on the speaker switch or where the speaker switch board connects to another board. Not an uncommon problem with some Sony receivers.

Feb 25, 2009 | Sony STR-DE845 Receiver

1 Answer

Receiver goes into protector mode


Nope, power supply it would not even power up.  The capacitors are fried

Jan 04, 2009 | Sony STR-DE635 Receiver

2 Answers

Receiver clicks and rear speakers stop working


Maybe, it worked for me. my rear speakers workt ramdomly, often not. so i re solder the relay for the rear speakers, now it works fine everytime, a hole movie and some random on and offs, it can't do any harme to try=)

Dec 09, 2008 | Sony STR-DE635 Receiver

1 Answer

Sony STR-DE635 Receiver-no sound at all


sorry my expertise is in appliances, youl need to repost you question to another tech

Mar 21, 2008 | Sony STR-DE635 Receiver

1 Answer

Sony STR-DE635 Receiver-no sound at all


Turn your volume down,press the tape monitor button.then turn up?

Mar 20, 2008 | Sony STR-DE635 Receiver

1 Answer

Led display goes dead


I suspect intermittent 31V supply, filament supply or bad connections on fluorescent display.
Check Q801 31V reg , R802, zener on base of Q801 located on DC board. Inspect all boards for bad solder joints, reflow and tighten pcb grounding screws.

Oct 23, 2007 | Sony STR-DE635 Receiver

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