Replacing My Memphis Audio ST-1000D blown output transistors. HELP!!! - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

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
Thread Tools Search this Thread
Old 28th June 2012, 11:46 PM   #11
Eva is offline Eva  Spain
diyAudio Member
Eva's Avatar
Join Date: Oct 2003
Location: Near the sea
Send a message via MSN to Eva
Does the fuse pop when remote is activated, or even with open remote?

I recommend you to get or borrow a current limited 12V supply, something that can do 10-25A and then fold back to avoid damage. After repair, doing the first test directly in the car is not a good idea, doing it in a work bench is much better.
I use to feel like the small child in The Emperor's New Clothes tale

Last edited by Eva; 28th June 2012 at 11:50 PM.
  Reply With Quote
Old 29th June 2012, 11:10 PM   #12
diyAudio Member
nigelwright7557's Avatar
Join Date: Apr 2008
Location: Carlisle, England
You need to check all transistors for shorts in the amplifier.
Output transistors failing will often take out the power supply transistors too if the fuse doesn't blow quick enough or the protect is too slow.

Just to complicate things I have seen blown output transistors taking the class d IC with them.
Murton-Pike Systems PCBCAD51 pcb design software.
  Reply With Quote
Old 18th July 2012, 04:46 PM   #13
diyAudio Member
Join Date: May 2012
Is there anyone willing to take the time to actually fix this amp for me PLEASE! I made an agreement with the wife that I would only reinstall this amp back into my car if I could fix it myself! That means I have a VERY limited budget but I know that there is only a bad resistor or transistor that's causing the red protect light to come on! I just don't have the knowledge or time to learn properly to get this amp working again and re-installed by the end of car show season! Please send me offers through a message. thanks
  Reply With Quote
Old 27th September 2012, 02:58 AM   #14
diyAudio Member
Join Date: May 2012
Ok, so what are the parts labeled KO304 and KO307, voltage regulators? I was wondering what the possibility of these being burnt when the power FETS when out?

Also, if the through holes for the transistors lost their solder eye-lits when I was desoldering the old ones, can I solder the legs to the nearest solder point in that same area? For example, the first leg of the power FET connects to the gate resistor so can I solder a joint from the first leg directly to its cooresponding resistor?
  Reply With Quote


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
memphis 1000d timwebb Car Audio 36 28th August 2011 11:30 PM
1000D Memphis Amp ? Hoppy72450 Car Audio 9 23rd April 2011 04:07 PM
another memphis 1000d timwebb Car Audio 3 11th April 2011 03:14 AM
Memphis 1000D transformer. tgdrums1990 Car Audio 4 16th June 2010 03:32 PM
Memphis 1000D Transistor Blowing jf8620 Car Audio 46 12th March 2006 10:49 PM

New To Site? Need Help?

All times are GMT. The time now is 10:50 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2