Question about Harman Kardon AVR 235 Receiver
While watching any action movie or music videos at a certain level (I don't think it too loud) the system will flash protect and shut off. The movie isn't shaking the walls or anything & is at a medium volume setting. How to I reset or correct this problem?
I have the same receiver with the same problem. I shipped it to a certified HK repair center and they shipped ti back "No Problem Found" and billed be $100.
I recommend avoiding HK products. The receiver has been nothing but problems for me, and the company does little if anything to support their products.
Posted on Oct 21, 2012
It could be the speakers are at too low of an impeadance or a bad speaker. Check the bad of the receiver and see if it states the proper type of speakers to use. Most say "8 ohms to 16 ohms "A or "B" and "16 ohms or more "A + B". if your speakers are 4 ohm speakers that is your problem.
Let me know what you find out about the speakers. It says on the back of the speakers where the wires plug in what ohm rating they have.
Posted on Jul 01, 2008
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Posted on Jan 02, 2017
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Generally speaking, an amp protects itself from heat, shorts and overloads 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 as a root cause for intermittent shutdown.
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