Question about Denon AVR-689 7.1 Channel Home Theater AV Receiver AVR689

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Denon Problems 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?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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techman
  • 3130 Answers

SOURCE: Denon AVR-810 going into PROTECTION mode

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

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tech48
  • 624 Answers

SOURCE: Denon AVR-1907 blinking red power button

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

  • 93 Answers

SOURCE: Denon RC-978 remote... every button shuts receiver off

Drop the front panel of your receiver,there is ZONE 2 ON/OFF switch.
Good day!
solutiondoct

Posted on Nov 06, 2008

  • 163 Answers

SOURCE: Have put an optical cable from optical digital out

You need to do digital input assignment. Go to SETUP, DIGITAL INPUT ASSIGNMENT, set OPTICAL 1 for your input (DVD).

Posted on Apr 09, 2009

  • 1054 Answers

SOURCE: Denon receiver problems

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

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