Hi,

My Harman Kardon AV Amp switch off by itself after about 10 minutes of play. I suspect that it caused by overheating. But I don't know what could be the cause. Previously I never had this problem. It only happen about 1 month back. Any one experience a similar problem and can advise me on how to solve this?

Thanks in advance.

If it is still under warranty, better send back to distro.

Too bad. Warranty already over.

send for servicing...u got no other choice.....or get another amp

maybe dust collected inside and need to clean up.

Hi, I opened the top yesterday night and cleaned up the dust. Tried again but still the same

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Added on August 27, 2009, 3:37 pmAnother amp need to spend $$$. By the way do anyone know the servicing centre for HK amps?

This post has been edited by leeshock: Aug 27 2009, 03:37 PM

How young is the HK?

Maybe u can contact their disti ....IMS, I think ... ?

Changes in speakers impedance might cause the amp to overheated. Recheck speakers cable and try one speaker first to narrow down the problem.

Secondly, if the built-in fan is not working will also caused the amp to shut down.

Any sound from your speakers before it shut down?

check if your transitors still attached to the heatsink...hehe

Hehehe..funny aawcy.

Some people is trying to hard to be funny.

Its an old model but bought it at a good price from Desa Home Theatre March ast year.

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Added on August 27, 2009, 9:47 pmHow can I get in touch wt IMS?

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Added on August 27, 2009, 9:49 pmTook out all the speaker and sub woofer connection. Open up the case, clean up the dust and switch it on. 10 minutes later it switch off by itself.

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Added on August 27, 2009, 9:49 pmSpeakers and sub all still working before shutdown. There is no fan inside. It uses heatsink.


This post has been edited by leeshock: Aug 27 2009, 09:52 PM

I dun have their number off hand, why dun u try googling a bit. Tho i am not 100% sure whether they still distribute H/K or not. GDLK.

bro, did u try to set the front spkr to 'small' and let the LFE to the subwoofer. normally for some AVR they will auto switch off, when the current is to high supplied to the front spkr. cheers.

I actually took out all the speaker and subwoofer connection and left it on. It took about 10 minutes before it switch off by itself. Quite irritating when u are watching a movie.

I already googled the address for IMS. I'll contact them today and update u guys later.

This has comfirmed the fault is in the amp. Nothing to do with the speakers, cables or sub. Even without any load it still shut down. It could be the system control.

ur amp sleep timer....have u check that?

Hi,

Didn't know the amp has a sleep timer. But I don't think so as there is no clock.

Anyway took the amp to IMS (No 4 Jalan BP4/2 Bandar Bukit Puchong) today during lunch. Its located in an industrial area. It took me some 30 minutes to find the place (located at Wisma Trio) with Google map.

Have to pay RM20 for the diagnosis. Also told them to update the firmware. They will get back to me in 7 days on the estimated cost before proceeding. Hopefully not too costly.

bad capacitors?