Question about Sony MHC-EC98Pi Shelf System

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Every time i plug in my mhc ec99i it will click 3 times then say protect

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Generally speaking, an amp protects 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.


Check for loose speaker connections at the speaker as a root cause for intermittent shutdown.

Posted on Mar 16, 2011

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When the protect indicator comes on, usually a power transistor has blown. The unit needs to be taken to a repair shop.

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Hi I have a Sony MHC-EC99i when I plug in the power cord it show "Protect" even I had nothing is connected to the unit,what shall I do now ,thanks.


If it's showing 'Protect' without any Speakers connected then you've got a fault with the Amplifier.

Depending on your Technical ability you could remove the outer case and have a look at it yourself. It could just be blown Capacitors on the Amplifier PCB or could be worse and require complete new PCBs if they are available for this model.

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Not knowing anything about your TV...

http://esupport.sony.com/US/perl/model-documents.pl?mdl=MHCEC99I click on "Operating Instructions"

Look at the section: Using Optional Audio Components.

Assuming your TV has an RCA audio output or headphone output, connect to the PC In. You might have to get an adapter. Select PC In to hear it. make sure the TV's internal volume controls are sending a "Fixed" audio output or its volume control will affect the output. Mute the TV or turn its speakers down.








Jan 16, 2011 | Sony Audio Players & Recorders

2 Answers

HI I HAVE SONY MHC-RV900D WHEN I SWITCH IT ON IT SHOWS PROTECT PUSH POWER. HOW CAN I PLAY MY SYSTEM AGAIN.??


Welcome to FixYa
Do Following...
  • Turn off the System-Turn it off for a while
  • Then turn it back on.
  • Still Problem, Turn Off system and Check the Speaker Code
  • RESET the system .
  • Remove all the connections, leave it for 24hours and then connect it up again
To Reset
  • Unplug Power Code
  • Plug it back again
  • Press Stop , Enter and Power button at Same time
  • Press Power Button to Turn on it
For more Here is the Guide for your Product Click here
Still have Problem The protective device on the amplifier has been activated because of short circuit. (“PROTECT” and “PUSH POWER” flash alternately.) Turn off the unit, eliminate the short-circuit problem and turn on the power again.

Hope you Got a Conclusion..Thanks for Contacting FixYa...

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I am also use the same music system (MHC – RV 888D)

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