Question about Audio & Video Receivers
Checked R184 10 ohm resistor and it checked out @10.7 so that looks OK. The DC voltages for R 145 and R146 look way out of wack. When measured against chassis ground R146 read -28.49 on one side and +3.28v on the other. Similarly R 145 measured +3.27 on one side and + 35.6v on the other. I did check the output transistors a week or so ago. When I compared the ohm readings one against the other they all were similar. I assumed that they wouldn't all fail at once so I discounted their failure. I only have the schematics for the 2106 not the complete service manual. Since the schematics don't have the voltage regulator model numbers I need to ask you for them and/or the Denon part numbers. I assume they will be unique to Denon. Otherwise I could go generic. Please advise and thanks very much for your input. It's what I was looking for.
Your information you need will follow this next paragraph. I just wanted to explain a little about myslef and the site to you first.
Since my information was just what you were looking for, a rating of "FixYa!" would have really been appreciated. A "Helpful" rating is good for some experts here, but it drags my overall rating down. I am sure you did not realize that when you rated my other post. A FixYa! rating is not just for getting a unit fixed, it is also appropriate when you get all the information that would be reasonable to get for your problem. It is rare that any expert here can actually solve a problem that requires some expert troubleshooting skills without ever having the unit in front of them to troubleshoot. So if you have received the best help possible, it is wrothy of a FixYa! rating. Most people who come here for help have no idea how to replace parts, they usuall want a quick fix that requires the pressing of a couple of buttons. 99% of the experts here could never figure out how to fix one of these Denon receivers. I don't want to toot my ownn horn, but I know these receivers as well as Denon knows them. I have been a audio technician for over 18 years and much of that time I have worked at an authorized Denon service center. So I know how to fix these better than most technicians anywhere. Just because I have so many years of experience working on Denons. I am doing this work at FixYa! for free, I don't get paid one red cent for helping you with this very expensive receiver. Don't get me wrong, I am not complaining, I am just reconsidering offering any more help here at this site. The only reward I get for the help I give people for free is a rating, and most people who get the very best information from me don't seem to realise that "Helpful" is really not that good. I guess you could say I feel a little under-appreciated. Well, enouph of my whinning, lets get to your problem.
From the voltage reading of the regulators I believe that the regulators are both shorted. They should only have 15 volts on each, one negative and one positive.
You could use generic regulators, but they usually have a metal tab on the regulator that would need to be insulated against the heat sinks. The original regulators do not have the metal tab, so no insulator is needed. They are in a TO220 package, just like many transistors. If you use a generic, you must also insulate the screw that holds it against the heat sink. If you do not know how to do these things, please just get the originals.
Here is the part numbers
IC101 Denon part number = 9630219408
IC101 generic part number= AN7815
IC102 Denon part number= 9630219505
IC102 generic part number= AN7915
I hope this gets you back up and running again. I think it will. If you have more problems let me know.
You can get those parts from this website, it is who we use at our shop.
Posted on Dec 03, 2008
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