Question about Harman Kardon AVR 225 Receiver

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HK AVR 225 Right Front Channel humms at low volume

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 diexamining 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.

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4 Suggested Answers

  • 3 Answers

SOURCE: Best speakers for HK AVR 135

klipsch, klipsch, klipsch

Posted on Feb 06, 2008


mlapres
  • 757 Answers

SOURCE: Harmon Kardon AVR 235 no sound

Ensure that your speakers are connected to the terminals that you have your speaker selector switch turned to.
Then check that you have your device, whether it be a CD or DVD player, or turntable, plugged into the correct input and that you also have the correct input selected on the receiver.

Posted on Dec 30, 2009

  • 2 Answers

SOURCE: My Harman Kardon AVR 254 is not responding. None

I am having the same problems with my AVR 254, did you find a solution?

Thanks

Posted on Apr 10, 2010

  • 27 Answers

SOURCE: AVR 254 is not responding. None of its front panel

ok
The reason your receiver is causing you issues is cause of a 2 time Delay fuse's on the transformer board all you have to do is to by pass them.
Check the connector on the top front of the HDMI board. at the bottom of the connector it tells you the voltage of each wire the middle one is GND. should read 1.8v and 5.6v if the 5.6v line is dead. you key's in the front panel and sometimes video and audio as well.. will also stop working. all you have to do is to by pass them.

I will be posting a video later today on how to fix this issue. Regards,
Search for AVR 254/354 fix

Posted on Nov 03, 2011

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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 monitor1.gif does all the HD video1.gif switching. hope this may help with some noise problems.

Jan 23, 2008 | Harman Kardon AVR 225 Receiver

1 Answer

Was using the harmon kardon avr 225 receiver and the front panel went out. .... screen display of the channel number, volume, or menu item does not work. ...


Try hooking up a yellow video wire from the back of the AVR 225 Monitor out. Should be at the end of the 7 or 8 yellow video ports on the back of the stereo. Next plug the other end into a yellow video in on a t.v. Get your remote, (Harmon/Kardon) and make sure the t.v. is on the correct video input and hit the OSD(on screen display) button on your harmon remote. There should be a setting in there that says VFD under ADVANCED menu option that allows for turning the front of your stereo lights on and off and dimming them half way also. OFF/HALF/FULL are the 3 options I believe.

If this doesnt solve it your display may have crapped out on you.

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thats not good power transformers in it went bad do u have it on a nice power strip or direct to wall

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The very FIRST thing to check is to make certain ALL of your speakers have an IMPEDENCE of 8 OHMS. Virtually all speakers of even modest quality will include this specification on a label on the back of the speaker. You CANNOT run more than (2) TWO speakers with 4 OHMs impedence on ANY amplifier (technical discussion too long!) [NOTE: MOST HK equipment have internal overload protection systems to prevent permanent damage. However, you cannot re-set these systems yourself. Your dealer or authorized HK service center must do this.] But, before you take this beast in for service, there is one more "test": check for shorted and/or mis-connected/disconnected speaker cables/wires. Visually inspect connections at the receiver and speakers first. You might find something obvious! If everything looks okay, then disconnect ALL of the speakers; and reconnect and test them one at a time (at relatively low volume.) For example, reconnect the left front speaker, test the system; THEN add the left front, test the system,and so on, ADDING one more speaker each time - FIRST MAKING SURE EACH OF THEM HAS AN IMPEDENCE OF AT LEAST 8 OHMS! IF there is a short (or bad speaker) this will help isolate it. HK is among the best equipment money can buy, and their equipment is pretty much "bullet proof!" Hopefully one of these "fixes" will work for you. GOOD LUCK!

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