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Question about Sony STR-DE485 Receiver

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Protection mode keeps kicking in

When a 'loud' part of the DVD is playing or the volume gets turn up the sound stops and the display says 'Protect'. This only happens when playing a DVD and seems to happen when there is a 'spike' in the volume.

Posted by Richard Jones on

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I also had a problem on my STR-DB930 where protect mode only occurred in loud sequences on DVDs. It ended up being a short in one of the surround speaker cables which only was significant enough to cause a PROTECT mode when loud signals were sent to the speakers. Woerht checking the speaker cables by taking them off and reattaching them one at a time to check if any of them are shorting out.

Posted on Jul 25, 2012

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This happens less often in "normal surround" mode

Posted on May 05, 2007

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My sound plays for a while and then the amp goes into protection
Try a different set of speakers or if it keeps going into protection you have a channel going bad.
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When playing dvd or or on video 3 playing a directv movie. Receiver keeps shutting off and the screen says protect. Seems to do it when the movie scene gets loud.
check your wires if there not touching behind the speakers and receiver. when it says protect this means something is shorting out or crossing over. one other thing it may be is if a speaker is starting to go bad. (please rate)
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Dec 21, 2010 • Onkyo TX-DS595 Receiver
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When i turn on my samsung HT-Z110, the word "Protect" appears...
Protect mode will kick in whenever a fault is detected.

You get the unit not powering up, and sometimes you hear a clicking noise, that is the protection switch that keeps shutting down the unit.

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.
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Mar 19, 2009 • Samsung HT-Z310T Theater System
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Kenwood amp kac-x401m
How long will the bass play before the amp kicks into protection mode and how loud are you listening to it? I've noticed with my amps that if they don't have enough air flow they will get hot and kick into protection mode. They will also kick into protection mode if you are running it at more than it can handle. Check your adjustments on both your amp and the head unit. Make sure you are not running more bass than the amp can handle.
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Nov 04, 2008 • Kenwood KAC-9152D Car Audio Amplifier
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My DVD HT-Q9
Protect mode will kick in whenever a fault is detected.

You get the unit not powering up, and sometimes you hear a clicking noise, that is the protection switch that keeps shutting down the unit.

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.
Read full answer
Sep 23, 2008 • Samsung HT-TQ85 Five DVD 5.1 Channel Home...
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DVD system shuts down during DVD play with various parts of shows
I think this is the answer you are looking for.

Let me know if you need more help.

Knowledge Article C337191 Error: The message PROTECT or UNPLUG shows in the display.
Follow this procedure to troubleshoot when a PROTECT or UNPLUG error is displayed.
IMPORTANT: The top of the receiver must have proper ventilation to keep from over heating.
  1. Reduce the volume level.
    2. NOTE: If the receiver is played at the maximum volume level it may enter the PROTECT mode. Maximum volume listening will cause the receiver to run hot and drain the output capacitors.
  2. If both the A and B speakers are being powered by the receiver at the same time, turn off the surround sound option.
  3. If protect occurs only when using a DVD player, the sampling frequency may be set too high.
    4. NOTE: Some receivers provide compatibility with the higher sampling frequencies through alternate connections. Consult the user manual for specific information.
  4. Ensure the speaker wiring is not damaged and is properley connected to the back of the receiver and speakers.
  5. If the issue is still unresolved after completing all of the troubleshooting steps, service may be required.
Created: Thu Sep 16 14:49 2004 | Last Modified: Wed Jan 11 09:02 2006
http://www.iq.sony.com/srvs/autoresponsev4.asp?id=337191
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Feb 13, 2008 • Sony DAV-FC7 System
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Amp going into protect mode
If you set the gain too high on the AMP, at loud volume levels some clipping or distortion of the output signal will occur. Most amps have a Circuit inside that detects this clipping or distortion and applies protection to prevent damage to the speakers and the amp. It would help to know if you are driving the speakers with a Line level output or using the speaker output from your deck. There are many things that can cause an amp to go into protect mode, and knowing a little more about your setup will help to solve the problem.
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Nov 07, 2007 • Alpine PDX-4.100 Car Audio Amplifier
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It works a few minites,then stops and displays "Protect".
Your complaint isn't a problem at all. This is a usual characteristic of the relevant amplifier. The protection mode comes on when the main volume/bass/treble or whatever is too loud. Unfotunately, you can not overcome it. But, as they always say: It's a Sony:)
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Amplifeir keeps turning off
HI K-****, Adjust your Gain setting to limit just enough so the amp does not go into Protect mode.
  1. Turn your Gain all the way down,
  2. then crank up the bass from your system.
  3. GRadually turn up the gain until you trip on protect.
  4. Turn the gain back a notch and your set for no more protect.
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