Question about Sony STR-DE635 Receiver

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Looking for another TV TEC to help with internal help. Have no sound on unit and the word "protector" is flashing in the display-she also said she could tap-push on the front of the unit and the sound would come back, and she also heard what she described as a relay clicking. Customer complained of this problem and brought unit in. I could not get the unit to act up at first. Used cooler and sound did go out. Resolded IC 501 & 601. and now the protector light is blinking and still no sound and have never heard the clicking she refered to.

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The clicking might have been the speaker relay attempting to engage. Measure any DC on the output transistors. You should see (B+/-,0.0 and +/- 0/6V). Anything else and the protection circuit will kick in. Update this with the measurements and we'll go from there. Note that this unmit may have darlingtons in it in which case the +/- 0.6 will be +/- 1.1

Dan

Posted on Mar 27, 2008

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Unit is flashing protector volume does not work


The protective device on the receiver has been activated because of a short circuit.

("PROTECTOR" flashes.) Turn off the receiver, eliminate the short-circuit problem and turn on the power again.

http://www.docs.sony.com/release/STRGA8ES.pdf

Generally speaking, an amp protects itself from heat, shorts and overloads.


Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced hands-on tech.

Jan 22, 2011 | Sony STR-GA8ES Receiver

1 Answer

The protector flashes STR DE625


Chances are it will need replacement parts (output transistors and a couple of resistors) Probably best left up to a repair shop tech.

Feb 01, 2010 | Sony STR-DE625

1 Answer

Receiver blew and flashes "protector" at all times. Disconnected speaker cables and still no change.


A problem has been detected internal to the unit and it has been shutdown to prevent further damage. The typical cuase is shorted output transistors or a defective voltage amplifier IC. Either repair will run about $25-$40 for parts.

Dan

Nov 16, 2009 | Sony STR-DA80ES Receiver

1 Answer

The idicator on my sony srt db930 reciever protector turn on.


There are a number of problem detection circuits inside the unit that will shut it down to prevent further damage. The most common cause of this is either crossed speaker wires or internally shorted output transistors. Try removing the speaker wires completely. If the unit still starts with the protect message, then the problem is internal to the unit. For these models, the output transistors usually cost in the $8-$15 range each and are replaced in complimentary pairs. Without taking internal measurements, I can not state that this is your exact problem, but it is the most common. Add in your local labor rate to get your approximate repair cost. Dan

Jun 09, 2009 | Sony STR-DB930 Receiver

1 Answer

Protector push power - dvd home theater system


Protect mode will kicking whenever a fault is detected.

Causes that can start protect mode are:

Electrostatic harges on internal circuits.
Leave the unit unplugged for power for one hour or so, this will allow discharge.

Bad speaker wiring.
Check speaker wiring, try unplugging and plugging back, or start after removing one speaker at the time.

Internal fault.
Internal fault is the natural cause for protect mode. If all the above did not work, then the problem is a blown component or an internal fault. In this case the unit must be taken apart , tested and repaired by an experienced person.
If the unit is less than one year old, or if you want to get service, call Sony at the phone number listed on the product documentation.

Regards.

Jan 20, 2009 | Sony STR-DE875 Receiver

1 Answer

You Just Responded to my STR-DG820 Issue..........


Its internal problem of receiver and as you said, its brand new so it would have warranty cover. Simply return it and get replacement. I have all tech info including schematics of this particular model and can guide you to resolve this problem but I receommend to askSony for warranty replacement.

Jan 02, 2009 | Sony STR-DG820 Receiver

1 Answer

Protector flashing on Sony AV receiver--Model STR-DG600


Me reicever rite protect some time ,i put the sytem off and a start again

Dec 31, 2008 | Audio Players & Recorders

1 Answer

Protector flashing sony da80es


could be fuse inside open it up cheak all cheall all conections start with just 1 unit in it

Feb 06, 2008 | Sony STR-DA80ES Receiver

1 Answer

No Sound


power the unit down totally from the wall socket to allow it to reset. It may have had a processor scramble in the outage and not selecting audio inputs correctly.

Dec 08, 2007 | Pioneer VSX-D509S Receiver

1 Answer

PROTECTOR (FAN) error message - what next?


Look inside the unit. There is a fuse you can replace in the rightmost front of the unit. 125v 3.25A, I believe.

Nov 18, 2006 | Sony STR-DA555ES

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