Question about Harman Kardon AVR 225 Receiver
I have a buzzing noise (bee in a jar) in my right front speaker and to a lesser extent in the right rear (smaller speaker) when I first turn on my receiver it has also had picture problems with the dvd player when I first turn them on. I have narrowed the buzzing problem down to the receiver itself through selectivly unpluging components, swaping speakers and wires,using a different wall outlet (both were well grounded). The sound doesn't change consistantly with the volume control but is slightly louder in the middle of the range and stops at the muted position.It doesn't go away with different surround selections.It gets alot quieter after the unit is on for 5-10 min.
It works fine for a couple of minutes the starts to hum. If you turn up the volume it masks the noise but is till audible, also the video switching cuts out. after examining the components I have seen some heat discoloration in the power suply area and believe it to be power for the video board. disconecting the ribbon cable form the video board the hum goes away, and so does any video wich does'nt matter for me because my monitor does all the HD video switching. hope this may help with some noise problems.
Posted on Feb 06, 2008
I un plunged the ribbon cable and no more buzz. I use HTMI now so the video was no longer needed, Great easy fix. Thank you
Posted on Jan 02, 2012
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Posted on Jan 02, 2017
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