Shuts off intermittently when only watching DVD's.
My HK AVR 120 will shut off at times when set on/about -10db. It only does this when in whatching DVD's. I don't know if this matters but when it was hooked up last time and in order to hear any audio on a DVD I have to select the select via the source button DVD then CD. If I were to select CD first or DVD by itself I get no audio. Any help is appreciated. I just rememebered soemthing else, intermittmently I will hear a loud pop/thud from what I believe is the powered subwoofer.
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"You may have observed that the HK 3485 is not equipped with digital audio inputs or surround sound decoding. If you prefer the complete home theater experience, you may wish to consider purchasing a fullfeatured Harman Kardon AVR Series audio/video receiver. However, we hope you will find that using a DVD player with the HK 3485 in smaller settings, such as a bedroom or den, surpasses the audio performance of most televisions, including those with onboard stereo speakers."
have a look in manual above from page 9.
I am a Tech in Michigan and have worked on lots and Lots of Denon AV Receivers. These units have Protection circuits for Overcurrent, Dc Protect, 15v Regulator inbalance, Rail Voltage Inbalance, Low Ac Voltage, Low Standby Voltage and Thermal Protection just to name the ones I remember. My guess is you Probably have either Poor Intermittent solder connections or Amp is not Ventillating Properly. Make sure you leave room above Receiver to Vent and You are using no Less then 6 ohm speaker Impedance per ch. Refer to Speaker Impedance chart on back panel . email@example.com
It could be the speakers are at too low of an impeadance or a bad speaker. Check the bad of the receiver and see if it states the proper type of speakers to use. Most say "8 ohms to 16 ohms "A or "B" and "16 ohms or more "A + B". if your speakers are 4 ohm speakers that is your problem.
Let me know what you find out about the speakers. It says on the back of the speakers where the wires plug in what ohm rating they have.
It must be a contact problem arount the power switch, power cable, fuse or the condensator area. Maybe you can se a black color on the board. And checking the solderind points with a magnifyer can help too.