Question about Denon Audio Players & Recorders

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I have a avr3600 if you dont connect speakers to it and cut it on is it normal for it to light up and say protection when you cut it on.

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Your receiver is bad. Normally the receiver will not say protection without speakers.

Posted on Jul 16, 2010

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1 Answer

Running four S70 Siroccos off the amp, everytime volume gets halfway the protection is cutting in with protection light flashing three times? When reducing down to two speakers amp cuts out three quarters...


You are overloading your amp. IMO 640A cannot handle heavy loads.

Better change the speaker combo and connect something that puts right load on the 640A. Else, get a meaty amp from CA.

Mar 04, 2011 | Cambridge Audio Azur 640A Amplifier

1 Answer

The protect light is on and my speakers stay at a light steady beat no matter what. How do i find out why the protect light is on?


Hi there.

Normally, the protect light will come on if you have a speaker fault or a supply fault. I have experianced this when the earth is bad connecting your amplifier to the battery or body. Check and repair if faulty.

To check if it is a speaker problem, disconnect all speakers connected to the amplifier and then power it up. If the light still remains on then you have a internal component failure which is only repairable by a qualified person. If by disconnecting the speakers, the amplifier then powers up correctly, you need to individually check each speaker connected. If you find a faulty speaker then replace. If you need more help then let me know.

Aug 12, 2010 | Boss AUDIO SYSTEMS D13002 Car Audio...

2 Answers

Denon AV Receiver Model AVR3600 locked at'' Protection '' mode


The power supply is damaged and needs to be serviced. You have done exactly what you should have to test for an outside issue, it's the receiver.

Nov 02, 2009 | Audio Players & Recorders

2 Answers

I have a jvc home stereo model number CA-HXC6 i have had it for a few years its on protect mode and i cant get it off dont know how it cuts off


Turn off power, unplugg unit, very carefully check speaker wire connections making sure no wires are touching each other or the back of the unit same at speakers connections. Also check speakers. Blown drivers can short terminals internally. This is the most likely problem. Remove the short, unit will come back on

Dec 21, 2008 | Bose 901 VI Main / Stereo Speaker

2 Answers

My amp stays in protection mode


Does it go into protect in the vehicle if you disconnect the speaker wires from the speaker terminals of the amp?


Nov 29, 2008 | Sony XM-2002GTR Car Audio Amplifier

1 Answer

Brand new avr588 receiver is turned on....is on for five seconds and then cuts off to standby


Hi donnie025,

I can't believe you haven't received an answer before now.

The red flashing light normally indicates that the protection circuit has been tripped. It can be caused by something as simple as a short in a speaker wire. Even if there is one strand of loose wire that makes contact with the back of the receiver, another wire, etc. it can cause a short. To protect itself the receiver will simply shut down.

1st. I would suggest disconnecting all the speaker wires from the back of the receiver. Then turn on the receiver (obviously you won't hear any sound) and see if the receiver does the same thing. If it does you should try disconnecting all of the source components (DVD player, Cable box etc.) and try again. If it still does it the receiver is bad and needs to be serviced or exchanged if you still can.

2nd. If the receiver stays on after you disconnect, then turn off the receiver and connect one speaker at a time, then power on the receiver at test it after connecting each speaker. This way if it suddenly shuts down after connecting a speaker you know which speaker or wire to check.

Let me know how it works out for you, I hope this helps if you haven't figured it out already.
Matt @ OneCall
www.onecall.com
twitter.com/onecalldotcom

Nov 08, 2008 | Denon AVR588 Receiver

2 Answers

Sonamp 260 cuts out


Normally this denotes a protect condition. Remove the speaker wires from the back of the amp and see if the green light stays on. If this fixes the problem, then there is a short circuit in your wires, speaker level volume control or speakers. The amp sees the short and goes into protect. After a couple seconds it closes the connection again and if the short is still present it goes back into protect.

Aug 03, 2008 | Sonance Sonamp 260 MKII 2-Channel...

1 Answer

Denon AVR-3802


I have repaired many of these Denon receivers over the last few years.

Since the headphones work, that means if you dis-connect the speakers it will turn on and not go into protect (when power cuts off a few seconds after turning the unit on).

The most likely problem is a bad speaker. to find out which speaker is causing the problem, do this.

Start out with just one speaker connected and then turn on the unit. If it turns on and plays music, you know that speaker is good.
Now turn the unit off again and add another speaker and keep the first speaker connected. Once again, if the unit plays, that speaker is also good.

Keep doing this same procedure one speaker at a time. As soon as you connect a speaker and then try to turn on the unit and it goes into protect, the speaker you just connected is bad.

To confirm that this speaker is the bad speaker, dis-connect all speakers and only plug the suspected bad speaker into a speaker jack that worked with one of the other speakers.
If the unit still goes into protect you know then that you have found the bad speaker.

If the unit still goes into protect, that speaker is bad and you will need to take it in for repair or replace it.
make sure you use 8 ohm speakers. if i remember correctly these Denons can use 6 ohm speakers, but those are harder to find and most home speakers are 8 ohms.

If the unit does not go into protect and that suspected bad speaker plays in one of the other speaker jacks, what you really have is a bad channel in the amplifier, the channel that the suspected bad speaker was previously connected to.

If you find out you have a bad channel, you will need to take it in to an repair center. Preferably an authorized Denon service center. There are not very many of those around. I work at the only authorized Denon service center in the entire state of Michigan.

If I can be of more assistance, don't hesitate to ask. And a good rating is always appreciated. :)

Jun 22, 2008 | Denon AVR-3802 Receiver

1 Answer

I have the denon avr3600, the protection is on, how can i turn it off, thanks


Unfortunately you can not just turn it off. Protection means that a problem was detected in the final output stage and that stage was shut down to prevent further damage to either the amp or the speakers. The typical problem is either the output transistors on one channel or the output amp chip for one of the surround channels. Expect a parts cost of about $25-$40 plus hte local labor rate for repair.
Dan

Apr 07, 2008 | Audio Players & Recorders

2 Answers

PDX 4.100 In Protect Mode..


According to the manual, the issue could be:
  • Internal issue with the amp circuitry.
  • A short on the speaker output(s).
  • Power source voltage is too high (aka above 14.5V).
  • Overheating.
The easiest thing to do is to try removing the connections to the speakers at the amp and see if the issue disappears after each set has been disconnected. Keep removing wires until both LEDs stay blue.

Mar 15, 2008 | Alpine PDX-4.100 Car Audio Amplifier

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