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.
Re: Harman Kardon AVR 120 turns off by itself after...
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. -higlider
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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.
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.
have a look in manual above from page 9.
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.