Question about Harman Kardon AVR 120 Receiver

2 Answers

Harman Kardon AVR 120 turns off by itself after normal work for about 1 min

My Harman/Kardon AVR 120 receiver turns off by itself after normal work (no overheating, good sound) for approx. 1-1.5 min in any mode. After pushing main switch On again it works normally (with no problems) for the same amount of time and turns off again. After pushing power On again it works for another ~1 min then shuts off and so on... It does the same even without any load (speakers disconnected) and everything else disconnected except power cord.
Does somebody have any idea what could be wrong? Thanks.


Posted by on

  • higlider Dec 09, 2007

    Harman Kardon AVR 120 in last month turns itself off about a minute after it is first turned on. Turning it on again it would stay on. But now it has to (go off, be turned on) four times before it will stay on. Once it decides to stay on it is ok thereafter, until it is turned off and cools down. Experts, what is the fix? I hope it is not to discard the unit because I love it and the sound it delivers!


  • mitkos Jan 05, 2008

    I finally fixed the above problem by myself! This is what I did:

    First, I discovered the AVR 120 stopped switching 0ff by itself after I disconnected Surround Amp board from Main Amp board - plugs CN 606 or CN417, and WA625 or CN 425 (surround L- and R- inputs). Then I replaced all (just in case) electrolytic capacitors on Surround Amp board with new ones (there are only 15 of them), considering this unit is almost 7years old, so they might be "dried out", especially those which are closed to heatsink (4x470uF/50V). Second, I also reset this unit as per Service Manual by pressing and holding together Tone Mode (6) and FM Mode Selector (12 ) while the unit is in Stand By mode. It works now like NEW!!!

    P.S. You can find schematics and complete Service Manual at It helped me a lot in troubleshooting and fixing my problem. I hope the above info will help everybody. Good luck!

    And THANKS to everybody who responded to my question.

    D.K. (mitkos)



2 Answers

Followup on higlider's problem. Now it has to be turned on ten times before it stays on. Email from Harman Kardon only suggests taking it to an authorized repair shop. It is clear that it is not from speaker short or overheating, because it only happens when the rcvr is cold.

Posted on Jan 05, 2008

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 8 Answers

Do you get an indication on the display where the point of failure might be? It would show up on the LCD speaker diagrams just before shutting off.

Posted on Dec 28, 2007

  • yldouright Jan 06, 2008

    The front panel will indicate the boards which cause the start up diagnostic to fail. Open the unit and detach the problem boards, then apply the power. What do you see now?

  • yldouright Sep 10, 2009

    Do you get an indication on the display where the point of failure might be? It would show up on the LCD speaker diagrams just before shutting off. If not, then you will need to replace capacitors



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

No audio from Harman Kardon AVR 7000

Incorrect polarity between receiver and speaker will not damage receiver however unmatched impedance speakers can damage amplifier section of receiver.
Please check connection cables in receiver and if receiver does not shut off in protection mode then it could be connection cable broken or some dry / cold solder joints on circuit boards in receiver.
Re-soldering of cold solder joints is job of qualified tech.

Sep 14, 2009 | Harman Kardon AVR 7000

2 Answers

My Harman/Kardon AVR 140 is stuck on stand by mode

I have the same problem on my AVR 1550 - its been bugging me for ages then it works again, then it doesn't ...

Aug 28, 2009 | Harman Kardon AVR 140 Receiver

1 Answer

I have a Harman Kardon AVR 235 Receiver that go's into Protect

To avoid making the avr go into protect mode when you power up your Hafler 4000 that is connected in the avr's pre-out, you must power up the set up in the correct sequence.

1. Turn off your avr
2. Connect Hafler 4000 to the avr's pre-out it it is not yet connected
3. Turn on your Hafler 4000. The avr will not go into protect mode becasue of the transients from the Hafler because it is still not powered on.
4. Turn on you avr. There should be no more transients from the Hafler at this stage unless it is not functioning correctly, so the avr shouldno longer go into protect mode.

Dec 08, 2008 | Harman Kardon AVR 235 Receiver

1 Answer

Hook-up's%20Manual&ex=tsrc%3Dtxtx&url=&u= have a look in manual above from page 9.

Sep 06, 2008 | Harman Kardon AVR 120 Receiver

2 Answers

Shuts off intermittently when only watching DVD's.'s%20Manual&ex=tsrc%3Dtxtx&url=&u= look in manual above page 42.

Sep 02, 2008 | Harman Kardon AVR 120 Receiver

1 Answer

Harman kardon avr 120

Do you get an indication on the display where the point of failure might be? It would show up on the LCD speaker diagrams just before shutting off.

Dec 11, 2007 | Harman Kardon AVR 120 Receiver

1 Answer

Harman kardon avr-147

Hi Javis. This is perfectly normal ! This mode change is done because the receiver auto detects the digital audio signal and sets the receiver's DSP to decode the signal correctly. You can go into the OSD menu to bypass the auto detection of it, but it's not recommended at all ! You're getting the best audio quality by doing so. Thanks ! cheebster.

May 07, 2007 | Harman Kardon AVR 240 Receiver

Not finding what you are looking for?
Harman Kardon AVR 120 Receiver Logo

3,392 people viewed this question

Ask a Question

Usually answered in minutes!

Top Harman Kardon Audio Players & Recorders Experts

The Knight
The Knight

Level 3 Expert

76001 Answers

Don Hart

Level 2 Expert

127 Answers


Level 3 Expert

5615 Answers

Are you a Harman Kardon Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides