Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Rockford Fosgate power t1500-1bd no output Help
Rockford Fosgate power t1500-1bd no output Help
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 14th July 2019, 09:44 PM   #1
rhempz01 is offline rhempz01  United States
diyAudio Member
 
Join Date: Nov 2016
Location: Milford Delaware
Default Rockford Fosgate power t1500-1bd no output Help

I desperately need help with repairing this output section. Q200-Q2012 all have the correct voltages. No shorted outputs or power supply fets.
Attached Images
File Type: jpg 15631406312647107246523695739932.jpg (1.06 MB, 47 views)
  Reply With Quote
Old 14th July 2019, 09:46 PM   #2
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Do you have R-R oscillation on all of the FETs in the output section?
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version.
  Reply With Quote
Old 14th July 2019, 10:25 PM   #3
rhempz01 is offline rhempz01  United States
diyAudio Member
 
Join Date: Nov 2016
Location: Milford Delaware
Should I test the center legs of the fets for voltages? Or where should I be grounded to see the r2r osilalation?
  Reply With Quote
Old 14th July 2019, 10:28 PM   #4
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Why didn't you just probe ALL of the legs? It would have been quicker than waiting for a reply.

For virtually ALL testing for car audio, you can leave your scope grounded to the ground terminal of the 12v power supply. I almost never even have the ground lead on the scope probe.
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version.
  Reply With Quote
Old 15th July 2019, 09:43 AM   #5
rhempz01 is offline rhempz01  United States
diyAudio Member
 
Join Date: Nov 2016
Location: Milford Delaware
I did, I just want seeing anything so I wasn't sure if it was because of a certain ground point. If I test between the 2 recifiers I get -71.1vdc.
  Reply With Quote
Old 15th July 2019, 10:37 AM   #6
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
These amps don't have a floating secondary so the primary ground is good for most tests. For tests without the rectifiers, you may need to ground the probe to the source leg of the outputs but that's not yet necessary.

Do you see a square wave on any of the terminals of the two driver ICs in the output section?

Does your amp use the 8 pin or the 16 pin driver ICs?
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version.
  Reply With Quote
Old 15th July 2019, 12:29 PM   #7
rhempz01 is offline rhempz01  United States
diyAudio Member
 
Join Date: Nov 2016
Location: Milford Delaware
8 pin, lm5110? No square wave, this is pin 4.
  Reply With Quote
Old 15th July 2019, 12:30 PM   #8
rhempz01 is offline rhempz01  United States
diyAudio Member
 
Join Date: Nov 2016
Location: Milford Delaware
P4
Attached Images
File Type: jpg 15631937536936681931252235109929.jpg (742.6 KB, 38 views)
  Reply With Quote
Old 15th July 2019, 12:35 PM   #9
rhempz01 is offline rhempz01  United States
diyAudio Member
 
Join Date: Nov 2016
Location: Milford Delaware
The white block 3k 5w resistors, get to hot to touch.
  Reply With Quote
Old 15th July 2019, 12:48 PM   #10
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
That's because it has rail voltage across it. That's normal.

Are any of the ICs on the BD driver board heating up? If you can't tell, freeze them with component cooler or inverted 'canned air' to see if one defrosts quickly.
__________________
Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version.
  Reply With Quote

Reply


Rockford Fosgate power t1500-1bd no output HelpHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Rockford fosgate t1500-1bdcp output help. rhempz01 Car Audio 57 4th April 2019 11:01 PM
Rockford Fosgate t1500-1bd power issues. rhempz01 Car Audio 22 31st January 2019 06:50 PM
Rockford Fosgate Power T1500.1BD S Merlington Car Audio 11 1st February 2015 08:51 PM
Rockford Fosgate T1500-1BDCP ------ No Output spooney Car Audio 8 27th August 2013 11:46 AM
Rockford Fosgate T1500-1bd - no output, no protect, no smoke whitejohnny Car Audio 32 11th April 2013 09:24 PM


New To Site? Need Help?

All times are GMT. The time now is 04:32 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki