Question about Denon AVR-689 7.1 Channel Home Theater AV Receiver AVR689
I have a Denon AVR689 Receiver. A few days ago, the sound is no longer heard from the speakers. The Denon system powers up fine. The remote control and main unit correctly switches between my Blue ray player on Quick Select 2 button, and selects my TiVo box for Quick Select 1 button. And when I press the remote control increase and decrease volume buttons or use the volume dial on the main system, the dB values correctly increase and decrease. What can I try to determine the problem?
Check sound from headphones. These models have been known to have bad headphone jacks that make the unit think there are headphones plugged in even when there isn't. Sometimes just plugging in headphones and unplugging them will fix it for a while.
Posted on Apr 26, 2013
Mwmw990's solution for the no sound problem was correct for my Denon AVR-488. Other solutions in various forums did not work for me. My amp just suddenly quit outputting sound from the speakers. (I only use the main "zone.") I did not get a flashing standby light, no indication of overheating or overloading. No input would output sound via the amp to the speakers. I switched the zone switches back and forth and it kept saying "H/D ONLY." I plugged in my headphones and heard clear sound. Plugging and unplugging the HD jack in and out and "roughing it up" a bit must have freed up a sticky HD connector because suddenly the display said "SPEAKER" and I have sound from speakers again. If it keeps needing this fix I guess I will need to take in the unit to replace the headphone jack input connector. Try this simple fix first!
Posted on Jul 27, 2013
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Posted on Jan 02, 2017
It sounds like you have a bad speaker on the zone 2, or you have the speakers connected improperly.
When you engage the zone 2 a relay clicks and the speakers then become part of the amplifiers circuit.
If the problem was in the amplifier, it would go into protect mode without even having speakers connected to it.
If the speakers all check good, you most likely have the wrong type of speakers, meaning the impeadance is too low, or you have too many speakers connected to it.
On the back of the Denon, you will see right around the speaker output jacks, what ratings the speakers should be. If I remember correctly, it says 6 ohms or more when using only "A" or "B", and it says 12ohms or more for "A" + "B".
If you have two 8 ohm speakers on the same speaker jack you now have a 4 ohm load. That is below the ratings and can cause the amp to shut down (go into protect). Since your amp shuts down right away, I think you have a bad speaker or way too many speakers connected.
I have seen many times when people will connect 2 or 4 speakers to the one of the outputs that are designed for only 1 speakers.
If you are using too many speakers you will need a speaker distribution box. It has a resistor network built into it so the amp never sees a lower impeadance than what it is designed for.
You can connect 4, 6 or 8 speakers to one set of outputs designed for 2 speakers. You do loose a lot of power to the speakers, but it is better than blowing up your amplifier.
If I can be of any further help, let me know.
Posted on Jun 22, 2008
It sounds like there is a problem with the differential circuit. The bias I am not sure about, as every unit is different. You should get the service manual to be sure or call Denon and see if they can give you an idea. Good Luck
Posted on Jun 05, 2007
SOURCE: Denon AVR 1609 volume Zone 2
Logitech recommends that zone 2 is controlled using device mode on your Harmony remote. Controlling zone 1 and zone 2 simultaneously within activities may lead to the AV Receiver turning on and off unexpectedly as you switch between activities. For example, if you try to turn on zone 2 within an activity, it may turn on or off zone 1 and vice versa. Controlling zone 2 in device mode will prevent this from happening.
Posted on Apr 20, 2010
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