Question about Denon Audio Players & Recorders

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Denon receiver avr 1506 has sound issues. One side has very very low crackly sound until the receiver is good and warm then suddenly the sound starts working normally on the affected side. Or if I really crank the volume the affected side will start working. Tried switching to channel B and also tried switching speakers but get the same result.

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Sounds like a thermal related problem and what comes to mind is a cold solder joint. I'm thinking that the "good and warm" is the circuit boards heating up inside where-as the "really crank the volume" is sound vibration to the circuit board helping to make connection. Try this...1st time turn on with problem present...use a clenched fist to lightly vibrate the chassis on top, bottom and sides. Does this vibration test make the problem disappear/appear? If it is a solder connection be warned...locating and repairing these type problems is no picnic and most often requires the "trained eye" of a electronics tech to locate.

Posted on Apr 01, 2015

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1 Answer

What do i do when my DENON AVR-1506 turns on then flashes red and turns off?


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

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In most AV receivers if the standby light flashes after turning on and you don't hear the regular click of the relay engaging after 4 seconds, indicates an output short or amplifier failure. The protection circuit prevents any further damage by not turning on system.
You will need professional help to fix this problem because even to a electronic enthusiast the construction of a typical AVR is not service friendly.

Jul 01, 2011 | Denon AVR-1506 Receiver

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what do i do when my DENON AVR-1506 turns on then flashes red and turns off?

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Did it ever work? Are you certain the sub is getting a signal. It has to be defined. How about the speaker levels adjustment? Did that work? Give us a clue.

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have the same deal go'ing on here, one of the cables were shorting out and never could figure it out

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If they are identical and your receiver has enough power to handle them both, examine the connection the subs use to connect to the receiver and split the connection by buying a splitter at a local radioshack.

You will probably be better off using the better of the two subs instead of having both connected. Your sound quality will be more balanced and clear when it comes to bass.

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disconnect everything from the unit and see if it still does it.
if it does i would check the output transistor (ic).

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