MTX thunder 3401 problem - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 13th September 2010, 05:45 PM   #1
FUNGC is offline FUNGC  Canada
diyAudio Member
 
Join Date: Sep 2010
Default MTX thunder 3401 problem

hey guys, im new to the forum and audio repair scene. ive read up the basic repair guide and searched hours on google upon my problem i have with my MTX Thunder 3401 amp.

so the problem is when i start my car it just thumps once, and seems to suck in my sub. can you guys tell me whats wrong with it? thanks!

Last edited by FUNGC; 13th September 2010 at 05:57 PM.
  Reply With Quote
Old 13th September 2010, 06:08 PM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
That's generally caused by shorted output transistors. That's the first thing you need to check. I'm not familiar with this amp (photos would help) but in similar amps, the larger transistors clamped to the heatsink are the output transistors.

Do NOT apply power to this amp unless all of the heatsink-mounted components are tightly clamped to the heatsink.
  Reply With Quote
Old 13th September 2010, 06:16 PM   #3
FUNGC is offline FUNGC  Canada
diyAudio Member
 
Join Date: Sep 2010
thanks for the quick reply heres a picture of it. i will try to take better pictures of it when i find my camera.

so the output transistors are the two on the left on the heat sink correct?

Click the image to open in full size.
  Reply With Quote
Old 13th September 2010, 06:26 PM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The 4 on the left of the heatsink.
  Reply With Quote
Old 13th September 2010, 06:53 PM   #5
FUNGC is offline FUNGC  Canada
diyAudio Member
 
Join Date: Sep 2010
so if i replace these the amp should operate with no problems? and where am i supposed to find these parts?
  Reply With Quote
Old 13th September 2010, 08:46 PM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The first thing you should do is to check them. There could be another fault causing the DC but the outputs are the most common fault.
  Reply With Quote
Old 14th September 2010, 01:40 AM   #7
FUNGC is offline FUNGC  Canada
diyAudio Member
 
Join Date: Sep 2010
well i checked the output transistors and the side closest to the audio output seems to be shorted, on one side all 3 legs no matter what configuration i do it reads zero and the other one the same thing too.

now the question is the model number of the transistor. it saids IRFP240 and there are other things on it like 424L and 92 and FD. would any IRFP240 transistor work on this amp? and thank you for your quick replies!
  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
MTX Thunder 81001 mike49504 Car Audio 10 28th November 2012 03:46 PM
MTX Thunder 81001 megael9 Car Audio 13 30th May 2010 03:23 AM
Mtx 3401 scampo77 Car Audio 27 8th August 2008 06:34 AM
MTX Thunder 3401 Class D Mono Amp gssmind Swap Meet 11 6th October 2006 10:32 AM
Mtx Thunder 2300 vypr Car Audio 35 21st September 2006 07:35 PM


New To Site? Need Help?

All times are GMT. The time now is 01:38 PM.


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