MTX 500D - 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 10th February 2012, 12:03 AM   #1
diyAudio Member
 
Join Date: Jan 2012
Default MTX 500D

Picked up a MTX 500D Amplifier. It does not work. Looking for some help on identifying the burnt components. Also what might have caused them to burn up. Thanks for any help in advance.

Last edited by jomede; 10th February 2012 at 12:49 AM.
  Reply With Quote
Old 10th February 2012, 01:00 AM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The regulators failed regularly in these amps because they ran too hot. When they failed, they often destroyed all of the op-amps in the amp. If you don't have any shorted outputs or power supply FETs, the regulator damage may be the only thing you need to repair but expect at least several hours work and expect to replace at least about 20 parts. Refer to the following:
http://www.bcae1.com/temp/mtx500dregulatordamage01.swf
  Reply With Quote
Old 10th February 2012, 10:19 AM   #3
diyAudio Member
 
Join Date: Jan 2012
Default Here are some pictures of the burnt components

Will I still have to replace all of those parts from the link you posted Perry?
Attached Images
File Type: jpg Amp1.JPG (469.6 KB, 69 views)
File Type: jpg Amp1a.JPG (422.3 KB, 63 views)
File Type: jpg Amp1b.JPG (482.3 KB, 61 views)
  Reply With Quote
Old 11th February 2012, 01:53 AM   #4
diyAudio Member
 
Join Date: Jan 2012
Can someone ID the burnt parts so I can replace them.
  Reply With Quote
Old 11th February 2012, 03:39 AM   #5
diyAudio Member
 
Join Date: Mar 2007
Location: Columbus, Ohio ^
Did you look at Perry’s picture in the link he posted?

It appears he states what the burnt components are & what to replace them with; which are 390 ohm resistors to reduce power dissipation in the regulator transistors. He also states what transistors to replace, zener diodes & more.

All the best & I hope you get it working.
  Reply With Quote
Old 14th February 2012, 09:42 AM   #6
diyAudio Member
 
Join Date: Jan 2012
1/2 watt resistors? What is the value of the 2 Zener Diodes?
  Reply With Quote
Old 14th February 2012, 07:10 PM   #7
diyAudio Member
 
Join Date: Mar 2007
Location: Columbus, Ohio ^
Yeah 1/2-watt resistors will likely be ok. I’m guessing 1-watt resistors would not hurt for that application either.

The zener diodes should be labeled with there part number, which then you can use to find there specs. Take them out carefully & look at the number.

They are likely 1N4746 zener’s; that’s what they are in my blown MTX 250D, should be the same for your 500D. They are 18v zener diodes, 1-watt I believe. Again you can take yours out to be sure.
  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 500D Burned! gustavomp3 Class D 0 1st September 2010 04:01 PM
What do I do with this faulty mtx 500d? odinsragess Car Audio 3 10th October 2009 11:49 AM
mtx 500d problems ampjunkielikeme Car Audio 40 23rd February 2009 04:30 AM
Help me fix MTX 152 and MTX 500D hakentt Car Audio 94 8th December 2008 06:26 PM
MTX 500D help audiobahnkid592 Car Audio 28 15th July 2008 11:43 AM


New To Site? Need Help?

All times are GMT. The time now is 07:18 AM.


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