Question about Denon AVR-5800 Receiver

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Denon avr 5800

Speaker cable accidentally touched. Power on but no sound. Replaced fuse several times but every single time is blown instantly as power is turned on.

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  • baothanh Sep 02, 2007

    I replaced the 12v ceramic fuse.

  • baothanh Sep 03, 2007

    Hi, this is the picture of Denon AVR-5800 with top cover off.

  • rajivsab May 19, 2009

    Hi I have the same receiver BUT all my lights and status indicators are on but I have no sound in any digital input modes - i plug an ipod into the CD input and I can hear Stereo, Pure Direct and Direct (it is the sweetest ounding amp i have ever heard) but nothing else works. I can pass thru to view OSD - no sound on the digital inputs - plugged DVD player in as well as a CONCAST BOX via Optical Inpiuts that were correctly configured. no sound coming out? is there a master volume muting button? i do not have the original repote as well - using Harmony remote. ideas? is this a fuse? transistors? blown amp, blown dsp? who knows.

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I can help you solve this problem. However you must describe to me which fuse you have replaced. Is it the fuse on the power line or is it a fuse in the speaker line (which I highly doubt). usually this type of amplifier uses two technologies. One is transistors the second is integrated chips. This is in regard to the output stages. I assumed you speaker cables shorted each other while the volume was set at a high level with music playing. Anyway if you are willing I am able to help.

Posted on Sep 01, 2007

  • Tinu Patel Sep 02, 2007

    Now the problem is somewhat clear. I suspect shorted transistors or main capacitors are shorted. This requires some troubleshooting on your part. However if you need me to help you you need to be in new jersey. Or else you can send me pictures of the amp opened with the top cover off. I can the direct you on troubleshooting.

  • Tinu Patel Sep 05, 2007

    OK this is a convential power supply system. If the power does come on and stays on most likely nothing is wrong with the main capacitors which are the two small circles to the left of the big black circular transformer. It is safe to say you have blown transistors. If you are familar with testing diodes then you need to put the DMM in the diode checking mode. Next realize that a transistor BJT are usually two diodes back to back. It may be also possible you have mosfet power in which case the testing is a little different. If you are willing to do this kind of troubleshooting, judging from the picture it seem a lot of work to get to the transistors that are mounted on the heat sinks let alone trace the correct one for the front channel. Your amplifier should have protected itself from the short circuit. Did you short the speaker terminals together at high volume? or did you blow out the speakers at high volume? The reason for my asking is very simple, the short circuit protection circuitry could be at fault where it keeps the output from turning on even though everything is ok. In conclusion the only way I can really help is for me to look at it myself. Even then I cannot guarantee that we will be able to fix it.

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Hi I have the same receiver BUT all my lights and status indicators are on but I have no sound in any digital input modes - i plug an ipod into the CD input and I can hear Stereo, Pure Direct and Direct (it is the sweetest ounding amp i have ever heard) but nothing else works. I can pass thru to view OSD - no sound on the digital inputs - plugged DVD player in as well as a CONCAST BOX via Optical Inpiuts that were correctly configured. no sound coming out? is there a master volume muting button? i do not have the original repote as well - using Harmony remote. ideas? is this a fuse? transistors? blown amp, blown dsp? who knows.

Posted on May 19, 2009

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