Question about Samsung HT-AS720ST Theater System

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Hello my name eddy leiva like 1 year ago i bought a av surround reciever ac-r720 and like 3 month ago the subwoofer stop working its has power because you can hear when it turn on but you cant hear anything from it. its connected correctly please help!

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SOURCE: my samsung 40" lcd power problem

I had the same problem with my Samsung LN26A450 LCD TV. I found the following YouTube video http://www.youtube.com/watch?v=Mm51C_RDIZE titled "Samsung TV Repair - Part 1 of 2) (also watch Part 2 of 2) which shows how to easily fix the problem. The problem is bad capacitors on the power supply board. My TV had seven (7) bad capacitors - all 7 had dark stains on the ends from leaking electrolytic fluid and one (10V 2200MFD) was blown with bulging ends. I ordered 7 new high-temp (105 degrees C) aluminum radial capacitors from DigiKey.com matching the Temperature, Capacitances and Voltage Ratings for each damaged capacitor that I removed. I followed the instructions in the video except I used desoldering braid ($3.99 at RadioShack) to remove the solder attaching the bad capacitor leads to the power supply board. Once you wick up the old solder from all sides of each lead wire using the desoldering braid, the bad capacitors are easily removed. Total cost of repair including soldering equipment was less than $50. Thanks to “The Professor” for posting the video and saving me $400.

Posted on Oct 30, 2009

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Posted on Feb 03, 2010

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SOURCE: My Samsung HT-AS720ST (AV-R720) surround sound receiver started

The problem is caused by the PULSUS PS9829B digital audio processor. We ordered it in from a Samsung authorized service centre.
Problem is now solved. Unit works perfectly. If you have never tried working with surface-mount ICs I would skip it if I were you. This IC has over 100 pins on it. However the part is available from Samsung. Print this comment and take it to your locat service centre along with your receiver. They should be able to repair the board unless they are wussies and cannot do surface-mount work.

Posted on Oct 21, 2010

  • 21 Answers

SOURCE: I cant get the surround sound to work after

Hi

You will have to assign the optical input to the input you are using, so for instance if you have plugged the optical cable into opt 1 on the onkyo reciever and wish to use the DVD input on the onkyo reciever, you need to go into the set of the onkyo to digital assignments or in/out assignments, dependent on the model, and select OPT1 for the DVD input. You can find out how to exactly do this in the onkyo's manual under 'digital assignments' or 'input assignments'.

Regards

TechSupp12

Posted on Dec 12, 2010

  • 1 Answer

SOURCE: I own a Samsung AV Surround Receiver AV-R720. I

I was just looking for a service location online and found this site...I have the same problem as the last guy...!

Posted on Jan 11, 2011

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