Trying to repair Samson SX1200 w/ blown outputs on one channel - Page 3 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 4th October 2012, 12:12 AM   #21
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
the point is just a joke ( the all ratings of these amps is just a joke )
So i see the approach to make something ( or proper suggestions ) also as a ''joke ""

No hard feelings here ...the intention was to see the issue a bit more light and fun

Still though the things i said for the ""principal of operation"" are very precise and correct .

Kind regards
sakis
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 7th November 2015, 11:16 AM   #22
Nohabla is offline Nohabla  Norway
diyAudio Member
 
Join Date: Feb 2007
Location: Norway
Send a message via AIM to Nohabla Send a message via MSN to Nohabla Send a message via Yahoo to Nohabla
I know this is an old thread but i try anyway, did you get a hold on the service manual?
I can't seem to find service manual for Samson SX1200 anywhere, anyone got one?
I just bought two of these sx1200 as repair items, both got dead channels.
A service manual would be handy before i start examining it. Only done a visual check, nothing obvious.
  Reply With Quote
Old 7th November 2015, 10:03 PM   #23
dimakos is offline dimakos  Greece
diyAudio Member
 
Join Date: Jun 2014
Location: Chios
Default service manual

Quote:
Originally Posted by Nohabla View Post
I know this is an old thread but i try anyway, did you get a hold on the service manual?
I can't seem to find service manual for Samson SX1200 anywhere, anyone got one?
I just bought two of these sx1200 as repair items, both got dead channels.
A service manual would be handy before i start examining it. Only done a visual check, nothing obvious.
the same i think..
Attached Files
File Type: pdf S1000.pdf (474.2 KB, 61 views)
  Reply With Quote
Old 11th November 2015, 11:37 AM   #24
Nohabla is offline Nohabla  Norway
diyAudio Member
 
Join Date: Feb 2007
Location: Norway
Send a message via AIM to Nohabla Send a message via MSN to Nohabla Send a message via Yahoo to Nohabla
Thanks, other than some different component values and types it looks very similar.

Have done some testing, and most of the output devices are blown along with the emitter and base resistors.
While i'm in there i'm gonna recap the boards, and maybe add the fourth pair of output devices. Looks like there's just enough room for it on the heat sink, and it's already pre tapped

The power supply has 2x 3300uf 100v Su'scon cap's on each channel, seems a little low for 2x 300w 8ohm? So i'm looking for replacements in the 6800uf 100v range, but not eager to throw too much money at them, any suggestions?
  Reply With Quote
Old 24th April 2016, 08:52 AM   #25
diyAudio Member
 
Join Date: Jun 2012
Hi, I know, old thread, long shot. I want to know how to do what you all can do. I'm looking at a Samson sx-1200 on my bench, and found this thread. Using the info from this thread I know I can probably find part numbers for transistors and solder them into place. I know I'll (at best) be just hoping for the best when I power on the amp after replacing the parts, not knowing at all whether I did any good or not.

What are your stories? How did you come to gain the knowledge that you use to repair amps like this? I can make a crossover, I can gewgle how to test a particular component, but where do you learn how to put it all together, end-to-end? I consider myself a repairman of all kinds of equipment, and as such I have lots of people who look to me as an electronic 'guru' but I know how much more there is to learn, I just need to know where to build a foundation.

Thanks so much for reading this 2-3AM call for help. I really appreciate any feedback that might point a drifter in the right direction.

-EJ
  Reply With Quote
Old 24th April 2016, 10:56 AM   #26
diyAudio Member
 
Join Date: Apr 2010
Location: Coffs Harbour
Electronics is an expression of mathematical concepts and it's very slow going to learn much by tinkering about on the bench without formal theory and demonstration.

However, a lot of folk cut corners and play with computer simulation to avoid the grind of theory lessons. For a hobby only, it's probably not a bad strategy but you won't learn much initially, other than what seems to work in the exercises you and others following, have tried out. Practice can still bring about a greater understanding and prompt more study, even so.

You build a learning foundation on reading texts and practical experimentation, like any serious science. Here are the forum favourite texts by two of our highly regarded senior members, written, I think, for those with more than a basic familiarity with audio electronics to begin with:
Audio Power Amplifier Design: Douglas Self: 9780240526133: Amazon.com: Books
Designing Audio Power Amplifiers: Bob Cordell: 9780071640244: Amazon.com: Books

A good, comprehensive and very informative website with all the basics, discussion and needs for just about any audio project - also by another member, Rod Elliott (rode): Elliott Sound Products - The Audio Pages (Main Index)
__________________
Ian
  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
LANEY B1 Amp - Blown outputs technotronic Class D 0 17th April 2009 08:42 PM
Blown Audiobahn AX600 AMP: Repair? Dominick22 Car Audio 13 30th May 2006 07:41 PM
Channel blown on Soundstream amp antimatter Car Audio 6 28th July 2005 10:52 PM
blown crunch amp repair? sctt78 Car Audio 2 6th July 2004 02:06 PM
Boss REV3000D blown amp. Repair Suggestions? KyferEz Car Audio 4 6th May 2004 12:30 AM


New To Site? Need Help?

All times are GMT. The time now is 06:29 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki