Denon DRA-685 NO POWER

john65b · 03:47 AM

Hey all,

A friend brought over his broken DRA-685 tonight and there is no power. He said he thinks its stopped working after a thunderstorm...possibly a lightning strike...

Anyway, fuses are fine. I noticed that the Power connector is two pronged (no ground).

There is continuity on hot plug spade to both fuses and transformer primary winding, but no continuity on the Neutral power spade to the other transformer primary connection. It appears the neutral leg is switched on by a relayed circuit...

I have read that these Denons have all sorts of problems, including no power at all...

Anyway, I am thinking of jumpering the power neutral to the transformer primary (bypassing the switching) to see if it will come up... any ideas?

c2cthomas · 25th July 2011, 04:03 AM

Hi John - you can download a service manual from here - DENON DRA-685 Service Manual free download, schematics, eeprom, repair info for electronics

Check around the net for more info. I don't have any experience with Denon's - sorry.

john65b · 26th July 2011, 02:35 AM

I can't seem to download the manual...it directs me to a PDF reader (don't need one)

c2cthomas · 26th July 2011, 02:45 AM

Quote:

Originally Posted by john65b

I can't seem to download the manual...it directs me to a PDF reader (don't need one)

In the lower portion of the screen you should see an image of the pdf 1st page. To the right of that should be the words "get manual" - click on get manual phrase in what looks to be a sort of burnt red or brown color.

john65b · 26th July 2011, 03:08 AM

OK...sorry. Got it.

Thanks!!

Also found a cap on the relay switch that looks to have blown...

c2cthomas · 26th July 2011, 03:23 AM

Hey john65 - your welcome! Perhaps I should have mentioned that little quirk - I had the same problem when I 1st downloaded stuff from 'em - but I'm so familiar with it by now that I forgot to mention it.

Hope the manual helps!!

25th July 2011, 03:45 AM	#1
john65b diyAudio Member Join Date: Jan 2005 Location: Chicago	Denon DRA-685 NO POWER Hey all, A friend brought over his broken DRA-685 tonight and there is no power. He said he thinks its stopped working after a thunderstorm...possibly a lightning strike... Anyway, fuses are fine. I noticed that the Power connector is two pronged (no ground). There is continuity on hot plug spade to both fuses and transformer primary winding, but no continuity on the Neutral power spade to the other transformer primary connection. It appears the neutral leg is switched on by a relayed circuit... I have read that these Denons have all sorts of problems, including no power at all... Anyway, I am thinking of jumpering the power neutral to the transformer primary (bypassing the switching) to see if it will come up... any ideas? __________________ "I speak Spanish to God, Italian to Women, French to Men, and German to my Horse" - Charles V Last edited by john65b; 25th July 2011 at 03:47 AM.

25th July 2011, 04:03 AM	#2
c2cthomas 49 - for the 16th time diyAudio Member Join Date: Oct 2006 Location: Near "Music City" (Nashville Tennessee)	Hi John - you can download a service manual from here - DENON DRA-685 Service Manual free download, schematics, eeprom, repair info for electronics Check around the net for more info. I don't have any experience with Denon's - sorry. __________________ "You can't always get what you want" K. Richards/M. Jagger *** "Next time I will know some things better" Zen Mod

26th July 2011, 02:35 AM	#3
john65b diyAudio Member Join Date: Jan 2005 Location: Chicago	I can't seem to download the manual...it directs me to a PDF reader (don't need one) __________________ "I speak Spanish to God, Italian to Women, French to Men, and German to my Horse" - Charles V

26th July 2011, 03:08 AM	#5
john65b diyAudio Member Join Date: Jan 2005 Location: Chicago	OK...sorry. Got it. Thanks!! Also found a cap on the relay switch that looks to have blown... __________________ "I speak Spanish to God, Italian to Women, French to Men, and German to my Horse" - Charles V

26th July 2011, 03:23 AM	#6
c2cthomas 49 - for the 16th time diyAudio Member Join Date: Oct 2006 Location: Near "Music City" (Nashville Tennessee)	Hey john65 - your welcome! Perhaps I should have mentioned that little quirk - I had the same problem when I 1st downloaded stuff from 'em - but I'm so familiar with it by now that I forgot to mention it. Hope the manual helps!! __________________ "You can't always get what you want" K. Richards/M. Jagger *** "Next time I will know some things better" Zen Mod


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