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Hi try spraying the volume control pot with. Electronic cleaner solvent u will have to open the receiver to spray the pot ....u can buy the spray on E,/BAY ......GOOD LUCK
copied from av-r720 pdf manual:
C-WIDTH : This sets the width of the centre image. The higher the setting, the less sound comes from the centre speaker.
• DIMENSION : Incrementally adjusts the sound field (DSP)from the front or surround.
• PANORAMA : This mode extends the front stereo image to include the surround speakers for an exciting "wraparound" effect with side wall imaging.
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.
THIS RECEIVER IS JUNK. I had the same problem with my receiver and Samsung gave me a new unit as it was under warranty. 8 months later the replacement which was brand new did the same thing. Samsung tells me it is my problem now. I should have demanded another unit. the best advice I have is not to buy this product. Samsung won't help you when it breaks and it will break. Nobody seems to know how to fix it.......
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