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 7th May 2006, 02:39 PM   #1
diyAudio Member
 
steven344's Avatar
 
Join Date: Jun 2005
Location: ohio
Default nad 2400 thx amp schematic

Does anyone have a schematic fo a Nad 2400 power amp,I have 3 units with the same problem of not coming out of protections.They do not have any dc offset and no fuses are blown.It seems to be a problem with the protection IC that drives the speaker relays.
  Reply With Quote
Old 7th May 2006, 03:08 PM   #2
diyAudio Member
 
Join Date: Dec 2004
Location: Montreal
The service manual for this unit has just been posted on:

www.sharefx.com
  Reply With Quote
Old 9th May 2006, 11:45 AM   #3
diyAudio Member
 
steven344's Avatar
 
Join Date: Jun 2005
Location: ohio
Default nad 2400

Thanks,I figured out the problem.I had 3 of these to repair for a customer.They were all in protection but had no dc offset.The protection circuit was on because of C817 a 4.7 mfd was leaky.Once audio was applied both channels would go into protection because C818 was leaky a 220mfd.Also C403 and C453 was leaky in the diff amp cause protection with audio applied.In the power supply as preventive measure C810 and C811 was replaced because of open tops of the caps.They get heated up from the nearby regulators.These amps also have alot of bad solder connections that needed to be retouched.Its worth the time to go over the pcb and retouch any connections that appear suspect.
  Reply With Quote
Old 9th October 2008, 04:56 AM   #4
damage is offline damage  United States
diyAudio Member
 
Join Date: May 2006
-1.5V DC offset on Left channel caused protect. Replaced C403 and music was restored.

Obviously, this one is an easy one to do total recap on, just thought I would share.
  Reply With Quote
Old 25th July 2013, 05:23 AM   #5
Jonas83 is offline Jonas83  Sweden
diyAudio Member
 
Join Date: Jul 2010
I guess there are several differences between 2400 & 2400 thx (?) canīt find any specific 2400 thx ser.man but plenty of the 2400. anyone who has the thx service manual scraping around? or know the differances.....
  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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Denon AVR-2400 Schematic kwkam Chip Amps 1 22nd June 2008 07:50 PM
mtx rt 2400 jtcarter40 Car Audio 1 7th March 2008 07:27 PM
SAE 2400 amp needs help scm Solid State 8 2nd July 2007 10:08 PM
Nad 2400 SillyCone Solid State 4 30th June 2007 08:32 PM
pioneer pl-2400 distortion Analogue Source 0 4th March 2004 06:37 PM


New To Site? Need Help?

All times are GMT. The time now is 07:43 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright Đ1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2