Question about Samsung HT-TXQ120 Home Theater System Theater System

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Home theater system hx-tx72

How do i keep it from turing off. i need to get it off protection mode.

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  • mmansfield1 Jul 06, 2008

    My unit keeps switching off and I receive PROTECTION display

  • abswlf21 Dec 20, 2008

    mine keeps shutting off too. says "protection" and then shuts off


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  • 19,396 Answers

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.


Posted on May 04, 2009

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What's your problem?powerprotection mode unlock

If the protect function works and causes hindrance to trouble shoot, cancel the protection function as described below, and it will be possible to enter the self-diagnostic function mode. (The protection functions other than the excess current dtect function will be disabled.)

While pressing the "Tone Control" and "Info" keys, press the "Power" key to turn on the power and keep pressing those 2 keys for 3 seconds longer.

The seld-diagnostic function mode is activated with the protection functions disabled.

In this mode, the "Sleep" segment of the Flourescent Display flashes to indicate that the mode is self-diagnostic function mode with the protection functions disabled.

Caution!!!! Usiong this product with the protection function disabled may cause further damage to your unit, so use special care when using this mode.

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1 Answer

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First disconnect all speakers from the unit and then try turning the unit on too see if it still goes to protect mode. Protect mode is a shut down feature that shuts down the unit because of a shorted speaker or speaker wires are touching each other. If the unit does not shut down after disconnecting all speakers then reconnect them one at a time while turing the unit on after each conncection until you find the shorted speaker. If it shuts down with no speakers attached to it then you have a internal problem with the amplifier section, probably a shorted output transistor in the Amp circuit or preamp circuit.

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Mmm, sounds interesting but would be nice to know what "Keeps coming on then turing off"

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Check all speaker wires for shorts as this can shut down the receiver. The end may protrude too far into the chassis and touch the metal frame, this could cause a short. Try disconnecting one speaker at atime to eliminate a bad one.....

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disconnect all the speakers and turn it on. if it does not go into protect mode, then youve got a bad speaker or wire. good luck

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I'd be willing to bet you receive a Protection error just before powering off. If you take the cover off, you probably have a burned capacitor in front of the fan. that was my problem too. Samsung was no help, and it happened just after the warranty expired, as it has to many many others with this unit..

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Check you speaker connection first and make sure none of the wires are touching another terminal. The unit might be going into protect mode. If so it should display the words protect on the display before shuting down. Try removing one speaker at a time while turning on the unit after each speaker is removed at a time, to see if it shuts down on you. When and if it stays on then the previous speaker you took off is defective.. If none of this works then you might have a bad Preamp circuit or main amplifier output problem. Disconnect everything from the unit and turn it on, to see if it shuts down on its own, if so then there is a problem with the internal parts of the unit itself.

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1 Answer

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the unit goes into auto protection mode whenever there is a shorted pair of speaker wires. check all the connections carefully to make sure no wires are touching any others on the back of the main unit and at each speaker

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