Question about Sony STR-DE475 Receiver

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Sony STR-de675 always in protect mode only when plugged into power

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: SONY STR-DE675 RECEIVER

Protect mean that the speaker wires are touching eachother or that one of your speakers are blown and it is shorting out the receiver.

Posted on Dec 24, 2007

urnotjoeking
  • 5 Answers

SOURCE: StR-DE945 stuck in auto protect mode

I had a mechanical problem with the relay on the 1st power supply board. The relay right next to the small transformer. The blac cover for the relay just comes right off. Make sure that the little black plastic piece is still in position (you'll see what I mean when you open it.) and check the contacts on the relay.

Posted on Jan 24, 2009

ginko
  • 19396 Answers

SOURCE: stuck in protect mode

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.

Posted on May 29, 2009

smarthome2
  • 1114 Answers

SOURCE: i have a sony str-500 and when i plug it in all it

The most common problem found on FixYa for Audio Video Receiver's is:

My receiver say's "Protect" or turns on then off. What's wrong? Seven times out of ten it is a shorted speaker or speaker wire. To determine your exact problem, the first step is to disconnect all speaker wires "at your receiver" Next: Turn the receiver back on. If your receiver still says "protect" or turns off, it needs to be serviced. If your receiver stays on; reconnect your speakers one at a time and power back up after each speaker. You may find that after reconnecting all speaker wires it works! Most commonly the small braids of wire from the + to the - have touched and have caused the problem. In some instances, you noticed the problem only when turning the volume up. either way, make sure the exposed wires to your receiver are no longer than 1/2" long and are completely under the screw down terminal or slide in. When you've found the wire or speaker with the problem, your receiver will go back into "protect" At this point, disconnect the wire from the speaker at the speaker that may be causing the problem then test again.* Note* Make sure speaker wires do Not touch each other as this Will cause a short! If you turn the receiver back on and it stays on, you now know the problem is in your speaker itself. To test your speaker, you will need a multimeter. Set it to ohms resistance and touch the speaker terminals, if there is a short internally the meter will read "1......" If it's an analog meter, it will peg to the right. There's your problem. Now, within any speaker there are quite a few possibilities as to what could be causing the problem. Most common is a blown coil and the speaker needs to be replaced. Some speakers have internal crossovers (usually floor standing speakers) and may have a shorted or burnt board (usually very visible brown burn marks on the board) and can possibly be repaired if your handy with a soldering iron. Now, if you disconnect the speaker wire at the speaker and it still says "protect" Check your wire for the obvious cut or nail thru the wire if possible. If your system has wiring that runs behind walls, you may need to use your meter again. Disconnect the wire at both ends, keep the ends separated, put your meter on ohms resistance and touch probes to the + and - wires at one side. If the meter pegs to the right or reads "1...." the wire is shorted and needs to be replaced or repaired at the short. Hope this helps.

Posted on Jan 30, 2010

dunnbiker
  • 8546 Answers

SOURCE: Sony's STR-DE675 5.1 Channel Receiver - Speaker OFF problem

There's a button that turns the speakers OFF right above the headphone jack.

Get the manual: retrevo.com

Posted on May 21, 2010

Testimonial: "@dunnbiker Very true on assumptions! I've tried everything the manual suggests. Right now, nothing is connected to the unit, but upon power up, I get the SP:OFF display (which is not seen in the DEMO mode). I will try the headphone jiggling idea and see what happens."

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There is a relay on the power supply circuit board that might be faulty or has bad solder connections. If this relay does not work, power is not applied and everything is "dead". I had to re-solder the speaker relays on my STR-DE675 because they had cracked solder joints which made them work intermittently. It's possible that the power relay is what is causing your problems. If it has bad solder joints it might click, but power might not be able to pass trough the joints.

Does it still click when you turn it on or did it only do this once?

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There's a button that turns the speakers OFF right above the headphone jack.

Get the manual: retrevo.com

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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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Your optcal line may have a break in it ! try another opt cable or try useing the digital cable out!

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Help


check/replace your speaker wires. If a wire came loose, it will go into "protect" mode and shut down, to protect from a short circuit.

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SONY STR-DE675 RECEIVER


check the speaker's connections, I got them message when a speaker wire was unplugged and plugged back in while the unit was powered on

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