Question about Denon Audio Players & Recorders

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Have a AVR 1601protector circuit on checked wires ?

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The problem is your Dennon receiver,, try this so we can pinpoint out the problem..put the speakers close to the receiver ,what you will do now is to power up the receiver while listening to the speakers with the volume off.In about 3 to 5 seconds you should hear a slight click from the speakers try this both speakers,if you hear then circuit is ok.try to checked output for the speakers,;if there is high amount of DC at the speakers ouputs . the speakers will be destroyed. If you have a digital multimeter,measure the DC-should be about to 50millivolts or less..leave the set on for about 3 minutes for the circuits to stabilize before measuring,.then if you get overrange on the meter measure voltage then speaker will destroyed. then if the speakers are good and still no sound then the problem is in power amplifier section there's a four darlington transistors
, maybe defected or cold solder of the joint ,if seems your receiver needs to resolder the parts joints and to the tuner section and power amp. section.you better to do this so your receiver will work better again.. Comment by VOTIT, posted on Jun 25, 2008Just click FIXYA for tech48 below to his last comment ,its override the the thanks for trying color yell

Posted on Jul 04, 2008

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My 3kva petrol generatori change lot of avr after 1 hours it burn


If I understand your problem, you replace the AVR only to have it go bad after only ! hour. This is a very strong indication that the winding of the rotating field has a short circuit . If you do nor have meters and equipment to test, try this trick. In the wiring from the regulator to the slipring brushes, cut the wire and splice in a automotive fuse holder with a 3 amp fuse. If you run the unit and it blows the fuse, you then know the problem. Hope this helps you, Robert

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1 Answer

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HI,
Fist of all you have to disconnect all the speakers From AVR. Then switch ON the AVR . If its working normally then any of the speaker or any of the wire to the speaker is faulty. If so connect the speaker back one by one and check on which speaker connection does the AVR shuts off. That speaker or the wire to the speaker is faulty.

If the AVR is not functioning properly even after removing the speakers(shuts off) then there is internal fault with the amplifiers stage. Normally Dry soldering on the amplifier circuit board or any of the output stage is faulty. To rectify the same need professional support.

Ajin

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1 Answer

My harman kardon avr 55 keeps shutting off on its own


HI,
Fist of all you have to disconnect all the speakers From AVR. Then switch ON the AVR . If its working normally then any of the speaker or any of the wire to the speaker is faulty. If so connect the speaker back one by one and check on which speaker connection does the AVR shuts off. That speaker or the wire to the speaker is faulty. Also try the same with the HDMI cables if they are use. Improper connction of HDMI cables can lead to these type of problem

If the AVR is not functioning properly even after removing the speakers(shuts off) thne there is internal fault with the amplifiers stage. Normally Dry soldering on the amplifier circuit board can cause this problem. Its need proffessional support.

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1 Answer

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There are at least two AVRs for this generator. The original AVR has the diodes mounted on an external heat sink. The updated AVR has the diodes mounted directly on the circuit board. I have a schematic of the original model with the external diodes but it doesn't have the values or parts on the schematic. I will be more than happy to e-mail you a copy of what I have.

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AVR-789 powers down with red flashing light


This is an indication that there is an overload problem in the output section of the amplifier. The overload could be thermal or electrical The overload circuit has built-in protection to help keep the amp from burning itself out. disconnect all speakers and cables from the unit and power it up. If the problem still exists, it is internal and will need to be repaired bya professional technician. If the problem goes away, check for shorted, crossed wires to your external speakers. Try different wires and speakers.
Hope this helps.

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My Harmon Kardon AVR 500 sound doesn't work, I disconnected speakers, re connected & reset protection. Nos ound not even on test mode


Hi it is seem there is no output from your device. Please check the circuit components and wires for malfunction in your Kardon then. Regards

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1 Answer

No Power


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6e0bf8c.jpg

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1 Answer

Protection circuit momentary activation. Not heat/speaker problem


Is it possible for you to lower the source level? if yes go ahead...

There is an automatic Dialogue normalisation function in Denon which is activated to reduce overly bright input signals. ( most movies have wide variation in sound levels and therefore this function is avaialble). (see page45 of your user manual).

When your system worked fine with the AVR 2808CI, then why is it giving problem with AVR 3808CI....???? You must ask Denon.

Protection circuits are activated when:
1). There is rise of internal temperature.
2).Core wires of the speakers are touching each other or a core wire is sticking out of the terminal and touching the set's rear panel or the speaker itself has a problem.
3). Speakers with an impedance other than specified are being used.
or
4). the set is damamged or has bad solder / dry solder connection .

If your AVR is new, please do not accept, the set could be faulty. The protection circuits should not be activated unless any of the above happen.

You must know, at times the protection circuits are not fast enough and it could burn some of the transistors on the power output circuit. With time, the solders on the circuit board could give way and give you problems later on.

You must sort out with Denon if the AVR is under warranty.

Best of Luck.

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3 Answers

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1 Answer

Denon avr-5600 protection circuit.


My AVR 5600 has worked flawlessly for nearly 9 years!

Suddenly, when trying to play music (DVD or CD) through my LS32's (JBLPro), once I achieve higher volume, the receiver cuts off.... Using a Symetrex mixer, NO OVERLOAD light on the Denon, it simply cuts off!

Re-cut all the wire connectors... TV movies (5.1) work great at normal listening volumes.... but tonight, when cranking up music, the receiver simply cut off. Blinking light...

HELP

forfrance@hotmail.com

Apr 12, 2008 | Denon Audio Players & Recorders

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