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My Sony mhc-ec79i is displaying PROTECT on the screen can't do anything while this is up, please help

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Open the back of the unit and remove the 5way ribbon and 7way cable plug from the main amp module and turn on power the LCD should display normal operation, then power doen and refit those plugs and repower again and all should be ok now, simlpy by turning of the power does not reset these units you have to remove these leads to force reset, check theat the fan is not blocked with dust and thbe speakers are ok and no shorted wires etc and the impedance is ok.

Posted on Oct 10, 2013

  • David
    David Jun 27, 2014

    how do you remove the 5 way ribbon and 7 way cable?

  • Rob Duthie Jul 31, 2014

    Just unplu un clip them

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Posted on Jan 02, 2017

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  • 87 Answers

SOURCE: The push power protect always

This is a common question on this site. Amps of all types have protection circuits to keep them from doing a self meltdown. Testing follows this logic. 1. Remove all speaker wires. 2. Keep the volume down - all the way. 3. Turn the unit on. 4. If it does not trip off, then there is a problem either in a speaker or the wiring. a. Reconnect one at a time until/unless it trips off b. That will tell you where to look further.
If it does trip off, then there is an internal circuit issue in the amp and probably requires professional help to fix.

Posted on Nov 16, 2010

  • 12 Answers

SOURCE: My Stereo Is Always On Protect Can It Be Easily Fixed

Protect occurs when 1 or more of your speaker wires is touching somewhere. Power off the receiver, connect speaker wires to receiver and speakers again, power back on, should fix the issue.

Posted on May 28, 2009

dunnbiker
  • 8546 Answers

SOURCE: i have a sony MHC-GX2000 PROBLEM-

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.

Posted on Jan 16, 2011

  • 127 Answers

SOURCE: sony str de 475 ?? is appear 'protect' on

The message appears usually when the wiring is wrong (short circuit) or the speakers are defective or their impedance is too small for the amplifier's output (for instance 4 ohms speaker connected to an 16 ohms output). First, check your connections.

Posted on May 15, 2011

dunnbiker
  • 8546 Answers

SOURCE: when i switch on my sony str-de375 receiver

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; 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 and competent hands-on tech.

Posted on Aug 02, 2011

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