Memphis Belle ST-1300D - 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 3rd October 2007, 03:24 PM   #1
diyAudio Member
 
Join Date: Jun 2006
Thumbs down Memphis Belle ST-1300D

I am trying to return this amp to life to use it in my car due to it's size (it fits perfectly!). And more time I spend on it, more problems I discover and less I want to drop this project...
The deal is: couple of blown FET's in class-D section, ALL blown FET's in both power supplies (I think this amp was killed twice lol), shorted rectifier and, of course, completely burned 4700/75 capacitor, which made it through the board with 2" hole in diameter Board is multi-layered, and traces inside the board are damaged too I did my best to restore them, but it's hard as hell.
Amp now starts (both power supplies ok), slightly clicking relay and switching LED from orange to green. All outputs are not shorted. It is doing the same with driver boards removed.
Is a schematic for this amp available? I already spent too much time on this project to abandon it
  Reply With Quote
Old 3rd October 2007, 05:01 PM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
If the power supplies are not shutting down, check the output of each channel to see if there is any reason for the amp to be going into protection. Look for DC offset on the output of each channel. If there were shorted outputs, look for damage to the overcurrent protection (generally a transistor and resistor across the emitter/source resistors They generally have a diode connected to ground also).

If there is no reason for the amp to go into protection, the problem is likely in the protection circuit.
  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
knock off Belle Klipsch? capt mike Multi-Way 12 6th December 2009 07:00 PM
Belle Canto opera recordings jp_howard Music 0 18th April 2009 02:13 PM
FS/memphis belle mb-17 6-channel 1200 watt at 2-ohm beast ncamps Swap Meet 0 14th April 2009 01:01 PM
Meet belle lab, a new manufacturer of single driver fullrange loudspeakers cdwitmer Full Range 14 11th September 2005 06:23 AM


New To Site? Need Help?

All times are GMT. The time now is 06:48 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