Question about Sony STR-DE697 Receiver

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Soon after turning on receiver PROTECT flashes on the screen and then turns off. Manual says speaker connection problem, but can not find any problem with connections. HELP

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Speaker IC is faulty try test it and replace it.

Posted on Mar 13, 2009

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Hi, Welcome I will try & help.

What your receiver is saying is there is an impedance issue. Which is measured in ohms.

With system off unplug a speaker measure ohms across terminals at speaker if infinity meaning pegging on the scale your speaker is bad or has a shorted wire. Normal speakers are 50ohm.
Check each speaker.

If you find no issue with speakers, with audio wires hooked to speakers.
Disconnect one at a time from receiver & check each wire for ohms, if there is a major difference in ohms than the speaker had, your wire may be shorted. Lastly if all speakers & wires check out you may have a faulty protection circuit in your receiver. Have to have serviced.

Posted on Mar 13, 2009

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Hi

The protect light flashes due to power surge.Please check for a blown fuse. This is because the Amp. Protection circuit has been activated which has caused this problem and to solve it you need to check for the fuse and the capacitors .Also check for output transistor.

Please ask for any clarification and do accept this solution.

Thanks
Rylee

Posted on Mar 13, 2009

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Its the connection problem on the main board.open the device and resolder the speaker outlet connections to solve this problem.

Posted on Mar 13, 2009

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Unplug the wire and reconnect it properly and firmly.interchange the wires andd also check out.

Posted on Mar 13, 2009

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Did you test the speaker in the receiver .
During test does it detect speaker .

Posted on Mar 13, 2009

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1 Answer

SONY STR-DE445 UNLOCK CODE


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.
If the issue is still unresolved, service may be required.

Feb 11, 2012 | Audio & Video Receivers

1 Answer

My receiver turns on .. but the amp doesn't .. and the screen flashes "protect" for some reason.. and all other buttons are non responsive.. can you help me?


If PROTECT , PROTECTOR or a P is flashing in the display of the A/V receiver, there may be an incorrect connection or an improper setting. Try following these steps to resolve this issue:

NOTE: Because each of these steps represents a possible solution to this issue, check the A/V receiver status after completing each step.

  1. Check the speakers and speaker wires for proper connections.
  2. Reduce the volume level.

    IMPORTANT: If the A/V receiver is used at maximum volume level, it may enter the PROTECT mode. Maximum volume listening will cause the A/V receiver to run very hot and may drain the output capacitors.

  3. If applicable to your model, disable the surround sound option if both the A and B speakers are being used simultaneously.
  4. Ensure the top of the A/V 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 A/V 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 approximately 1 to 2 hours to reset the output transformers.

If the issue is still unresolved, service may be required.

Jan 16, 2011 | Sony STR-DE335 Receiver

1 Answer

PROTECT is flashing on our Sony Digital Audio/Video Control Center


PROTECT means the receiver is automatically powering down to protect it's amplifiers. Top reasons are overheating, which can be caused by poor ventilation, covering vent holes, excessive volumes for long periods of time, or it's actually just that hot in the room, which, with the current weather, I've encountered in clients homes before. The other option, and just as common if not more so, is that the speaker wire outputs are shorted out and are causing the amp to turn off. The easiest way to test this is unplug all of the speakers and turn it back on. If it still says protect, then it's either too hot or there is a physical problem with the protection circuit and needs to be serviced (this would be a good time to kick yourself for buying a sony receiver). If it DOES power on, plug in the speakers one by one, and if the amp goes into protect mode as soon as you plug in a speaker, it's an issue with that one. Check for short circuits in the line (kinks, frayed ends, staples going clear through the wire, etc). If the wire looks good, try putting a different speaker at the end. If a different speaker works, then the speaker is blown, which gives 0 continuity, and the receiver is correctly protecting itself from the high impedance load. Change the speaker.

Sep 08, 2010 | Audio & Video Receivers

1 Answer

Protect flashing on screen


Output amp needs repair or you have shorted speaker wire or bad speaker. Disconnect speakers. If still going into protect mode after turning reciever back on then have amp repaired.

Nov 20, 2009 | Harman Kardon AVR 65 Receiver

1 Answer

All i did was turn the volume down and protect came up on the screen now no sound at all


If protect is still there you need to follow you manual, and check your speakers. Protect is there so you dont blow out you speakers.

Aug 06, 2009 | Sony STR-DE605 Receiver

1 Answer

Flashing protect


the protector comes on to keep the amp from further damaging itself or the speakers. The buzz you heard was probably 60HZ line buzz from the main DC supply conducting full current through one of your speakers through a damaged amplifier transistor. Your stereo will need professional repair. The protect circuit basically opens the speaker relay (and sometimes shuts down the unit) to prevent this DC voltage and current from getting to your speakers until the problem is corrected.

Jun 17, 2009 | Onkyo TX-SV727 Receiver

1 Answer

Protect keeps flashing


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.

Apr 23, 2009 | Sony STR-DE475 Receiver

1 Answer

The dvr99 3 dvd home theater receiver will not stay on


Protect kicks on commonly when it over heats or when the speaker wires are crossed and it detects a short on the output. Your symptom sounds as though it may be a speaker wire because it happens right after the power is turned on. Check the speaker wire carefully, it has a habit of breaking inside the connectors of both the receiver and the speakers, especially after 5 years of service.

Feb 27, 2009 | Audio & Video Receivers

1 Answer

Denon AVR-3802


I have repaired many of these Denon receivers over the last few years.

Since the headphones work, that means if you dis-connect the speakers it will turn on and not go into protect (when power cuts off a few seconds after turning the unit on).

The most likely problem is a bad speaker. to find out which speaker is causing the problem, do this.

Start out with just one speaker connected and then turn on the unit. If it turns on and plays music, you know that speaker is good.
Now turn the unit off again and add another speaker and keep the first speaker connected. Once again, if the unit plays, that speaker is also good.

Keep doing this same procedure one speaker at a time. As soon as you connect a speaker and then try to turn on the unit and it goes into protect, the speaker you just connected is bad.

To confirm that this speaker is the bad speaker, dis-connect all speakers and only plug the suspected bad speaker into a speaker jack that worked with one of the other speakers.
If the unit still goes into protect you know then that you have found the bad speaker.

If the unit still goes into protect, that speaker is bad and you will need to take it in for repair or replace it.
make sure you use 8 ohm speakers. if i remember correctly these Denons can use 6 ohm speakers, but those are harder to find and most home speakers are 8 ohms.

If the unit does not go into protect and that suspected bad speaker plays in one of the other speaker jacks, what you really have is a bad channel in the amplifier, the channel that the suspected bad speaker was previously connected to.

If you find out you have a bad channel, you will need to take it in to an repair center. Preferably an authorized Denon service center. There are not very many of those around. I work at the only authorized Denon service center in the entire state of Michigan.

If I can be of more assistance, don't hesitate to ask. And a good rating is always appreciated. :)

Jun 22, 2008 | Denon AVR-3802 Receiver

2 Answers

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

Oct 02, 2007 | Sony STR-DE675 Receiver

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