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I have sony receiver hcd-vx8 with push power protect problem,i changed the ic stk411-240e then problem was gone but no sound then the problem was back.Is there any help outthere please.

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  • Expert
  • 166 Answers

Maybe theres other parts still faulty in unit ?

Posted on Nov 26, 2014

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  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: push power protect comes on

The audio amplifier IC are damaged you need to replace him

Posted on Aug 20, 2008

mjjdesigns
  • 98 Answers

SOURCE: PROTECT DISPLAYED ON RECEIVER

This generally means you've got a short somewhere, and the received is trying to protect itself.

My suggestion is to disconnect all of your speakers at both ends, and reconnect them.

Most times this happens because a speaker wire is lose, and the positive and negative connections are touching each other, causing it to short out.

Posted on Mar 25, 2009

dunnbiker
  • 8546 Answers

SOURCE: Sony STR-DE845 5.1 Receiver, No Sound

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 21, 2011

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