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I have a sharp home theater system ht x1 and when the volume reaches over 20 when playing cd, radio or dvd it shuts off and shows a "protect" error message.

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Hi,
Home theater or amplifier has inbuilt protection circuit to monitor output signal of amplifier as well as speaker impedance that are hooked with amplifier. If any problem occurs, protection will activate and shut down amplifier to avoid further damage (or expected damage) in amplifier and speakers, same time display error code as Protect.
In this Sharp HT-X1 system, one of speakers is defective and causing Protect activation because home theater is working up to 20 volume level.
Please unhook all connected speakers with system, turn on and increase volume level and monitor does it go to protect mode? If yes, them amplifier has internal problem like dry solder joints in amplifier output section etc.
If amplifier stays OK then lower the volume, hook one speaker at a time to test protect error, found good, unhook it and put other speaker until you see protect error with any specific speaker that is bad.
Hope above info would help you to diagnose problem.
let me know further question, if any.
Thanks.

Posted on Jun 28, 2009

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Just found this, hope it helps.

Sharp DVD Micro Theater System XL-DV60 solution Posted by sonny.marquez on Nov 21st, 2008 at 11:46pm

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