Disimproved NAD 304 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 29th November 2009, 10:22 PM   #1
diyAudio Member
 
Join Date: Nov 2009
Default Disimproved NAD 304

My old NAD 304 used to have the famous channel fading problem. So tried to replace the R 334 as recommended in many threads. But instead of using a 47k resistor, I accidently used a 47r resistor... Well, that's a factor of 1000. Since then, the red LED does no switch to green anymore. I replaced the resistor and put in a proper one, but the problem persists. So I think I burnt some other components. As I am rather new to electronics, I would be really grateful for any advice on where to start looking.
  Reply With Quote
Old 30th November 2009, 05:43 AM   #2
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Check Zeners D306 and D308 (I think that's the numbers as the copy of the service manual I have i rathter poor quality). There should be 3.9V across each.
My copy of the manual can be found here:
Welcome to Audio Circuit Denmark
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com
  Reply With Quote
Old 30th November 2009, 11:04 AM   #3
diyAudio Member
 
Join Date: Nov 2009
Thanks for the quick reply. I'll give it a try post the results.
  Reply With Quote
Old 1st December 2009, 12:01 AM   #4
diyAudio Member
 
CrazzyAbtTubes's Avatar
 
Join Date: May 2009
While you are at it, you should check for bad solder joints, they are almost always the cause of intermittent problems.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 10:24 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2