Rockford Fosgate T40001 BD Help - 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 27th January 2012, 09:28 AM   #1
diyAudio Member
 
Join Date: Aug 2011
Location: California
Default Rockford Fosgate T40001 BD Help

Hello I bought this amp from a guy at the local auction in town for 75 dollars he told me that he put the thing in the shop because it started smoking and stopped working. He then told me the guy at the shop he took it to called him about 2 weeks later saying he replaced the transistors in the amp but it still didn't work. That whole story sounded a little funny to me but I bought it anyways . After getting it home I put a power groung and remote wire on it and connected it to a car battery on startup the power light and protect light came on bright for about 4 or 5 seconds then the protect light went from bright to very dim. after about 5 minutes of being hooked up i started smelling something getting worm it was a resistor I took a close up picture of it
Attached Images
File Type: jpg powersupplyside.jpg (192.9 KB, 55 views)
File Type: jpg output side.jpg (141.4 KB, 55 views)
File Type: jpg full pic.jpg (183.8 KB, 55 views)
File Type: jpg hotspot.jpg (143.0 KB, 54 views)
  Reply With Quote
Old 27th January 2012, 01:05 PM   #2
diyAudio Member
 
Join Date: Sep 2009
Location: Wisconsin
You probably have damage to some of the drive circuits. The "shop" probably only replaced the fets, the ones attached to the heat-sink. My guess is they also only replaced the ones that were shorted and you may have some that are leaky.

You did fine with price, the down side is the shop didn't fix it.

The regulators that flank the resistor get warm too, you may have smelled those.

Last edited by brandes.cm; 27th January 2012 at 01:11 PM.
  Reply With Quote
Old 1st February 2012, 06:11 AM   #3
EBBCO is offline EBBCO  United States
diyAudio Member
 
Join Date: Jan 2012
Location: California
Send a message via Yahoo to EBBCO
Output fets sound shorted. Usually the common in these, when the light goes dim, it's drawing a lot of current before protecting. Replace the output fets as a whole, meaning all of them! Also output driver transistors and gate resistors. This will get you back to stock running condition. Don't just replace blown fets, if you do it will fail very shortly after.
  Reply With Quote
Old 1st February 2012, 06:41 AM   #4
diyAudio Member
 
Join Date: Aug 2011
Location: California
If it was the outputs that were bad could I unhook the high voltage wires that connect the power supply board to the output board of the amp and power it up to see if it still goes into protect
  Reply With Quote
Old 1st February 2012, 06:59 AM   #5
EBBCO is offline EBBCO  United States
diyAudio Member
 
Join Date: Jan 2012
Location: California
Send a message via Yahoo to EBBCO
Protect circuit feeds off high voltage rails common ground, so probably wouldnt work.
  Reply With Quote
Old 1st February 2012, 07:01 AM   #6
EBBCO is offline EBBCO  United States
diyAudio Member
 
Join Date: Jan 2012
Location: California
Send a message via Yahoo to EBBCO
Leave white wire in place and try taking red and blue off. See if it protects
  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
Looking for RF T40001.bd Schematic codegen Car Audio 2 28th November 2011 04:03 AM
Rockford Fosgate BD 1000 mike49504 Car Audio 1 10th July 2011 11:54 PM
Rockford Fosgate bd 1000.1 Problem lukeman269 Car Audio 11 8th April 2011 11:35 PM
Rockford Fosgate T40001.bd - Schematic Request Jat40 Car Audio 8 1st June 2010 10:44 PM
rockford fosgate 1500 bd mike49504 Car Audio 18 30th December 2008 08:37 AM


New To Site? Need Help?

All times are GMT. The time now is 07:52 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