MTX Thunder Elite 1501d - 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 16th January 2013, 05:12 AM   #1
diyAudio Member
 
Join Date: Oct 2006
Location: Franklin, Tn
Default MTX Thunder Elite 1501d

It appears someone has worked on this amp before and it may have some incorrect parts installed.

Can someone please confirm the part numbers for location Fet 191, 192, and 401?

Currently the amp has IRF940 in both FET401 & FET192 positions and a IRF640N in Position FET191. When powered it blows the MMBT5401 and the 2 - MMBTA42 by the irf640N


Thanks
Attached Images
File Type: jpg IMG_0748[1].jpg (809.3 KB, 76 views)
__________________
Tek 2221 scope with 2 10x probes, 2 Fluke 115 true rms meters. 106a, 20a & 5a power supplies. I have read the BCAE scope page.
  Reply With Quote
Old 16th January 2013, 10:13 AM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Contact MTX for the correct part numbers.

Do NOT power up the amp with any of the clamps off of the transistors.

Disconnect the preamp board after replacing the blown regulator components to see if that stops the transistors from blowing.
  Reply With Quote
Old 30th January 2013, 05:38 AM   #3
diyAudio Member
 
Join Date: Oct 2006
Location: Franklin, Tn
There is a SOT23 transistor feeding the a3120 that is labelled c1v9b...I could not find the part number in the SMD code book, however, I think this component is defective. I need the datasheet to confirm.

Does anyone know what the c1v9b is?

I am getting 76volts on the outputs.
__________________
Tek 2221 scope with 2 10x probes, 2 Fluke 115 true rms meters. 106a, 20a & 5a power supplies. I have read the BCAE scope page.
  Reply With Quote
Old 30th January 2013, 05:55 AM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
It's not defective. It's a jfet.

Post the DC voltage on all pins of both op-amps near the 3120s.
  Reply With Quote
Old 2nd February 2013, 05:40 AM   #5
diyAudio Member
 
Join Date: Oct 2006
Location: Franklin, Tn
Okay, I had replaced both NE5532 and while taking measurements I shorted pin 8 and pin 7 and it blew a hole in the ic... Pin 8 has 80.6 volts on both NE5532.

I do not have anymore 5532 at the moment. i will trace back the 80volts on pin 8 as I feel this is part of my issue.

I did get some measurements on 1 NE5532

NE5532
1: -12.39
2: -13.2
3: -12.59
4: -14.6
5: -12.19
6: -12.05
7: -0.5
8: 80.6
__________________
Tek 2221 scope with 2 10x probes, 2 Fluke 115 true rms meters. 106a, 20a & 5a power supplies. I have read the BCAE scope page.
  Reply With Quote
Old 2nd February 2013, 05:48 AM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
You blew the 15v regulator. If the preamp board was plugged in it likely burned several resistors and possibly some of the ICs.
  Reply With Quote
Old 2nd February 2013, 03:39 PM   #7
diyAudio Member
 
Join Date: Oct 2006
Location: Franklin, Tn
Quote:
Originally Posted by jordan_ciaramit View Post
Okay, I had replaced both NE5532 and while taking measurements I shorted pin 8 and pin 7 and it blew a hole in the ic... Pin 8 has 80.6 volts on both NE5532.

I do not have anymore 5532 at the moment. i will trace back the 80volts on pin 8 as I feel this is part of my issue.

I did get some measurements on 1 NE5532

NE5532
1: -12.39
2: -13.2
3: -12.59
4: -14.6
5: -12.19
6: -12.05
7: -0.5
8: 80.6
These measurements were taken before I shorted pins 7&8 together. Luckily I did not have the preamp board plugged in.
__________________
Tek 2221 scope with 2 10x probes, 2 Fluke 115 true rms meters. 106a, 20a & 5a power supplies. I have read the BCAE scope page.
  Reply With Quote
Old 2nd February 2013, 03:46 PM   #8
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The 15v regulator has failed. If it failed when the preamp board was plugged in, the preamp board likely suffered damage. Check all resistors marked 10R0 on the preamp board as well as R318 and R319 near the op-amp closest to the RCA jacks.
  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 elite 4001d thermal light on robbysankar Class D 12 10th November 2013 01:03 AM
MTX Thunder 1501D parts Tom7227 Car Audio 0 13th March 2012 03:22 PM
MTX Thunder Elite 1501d amp problems, could be fried? Infinity2600 Car Audio 13 11th October 2011 06:16 PM
MTX Thunder Elite 404 Dr Zeus Car Audio 23 6th May 2011 05:05 PM
MTX Thunder 1501D spooney Car Audio 49 16th July 2010 05:55 AM


New To Site? Need Help?

All times are GMT. The time now is 04:16 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