Rockford Fosgate P75.2 - 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 1st January 2011, 02:07 AM   #1
chipper is offline chipper  United States
diyAudio Member
 
Join Date: Oct 2008
Location: Los Angeles
Send a message via MSN to chipper Send a message via Yahoo to chipper
Default Rockford Fosgate P75.2

I want to replace the outputs on my Punch 75.2 only one channel is working but the other side had shorted output mosfets but i removed them from the mesha board. Can i use IRF540N and the IRF9540N?
__________________
Feel the PUNCH
  Reply With Quote
Old 1st January 2011, 02:11 AM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The IRF540N doesn't work properly in many of the Rockford amps. I recommend the IRF540A. I don't know about the 9540N.
  Reply With Quote
Old 1st January 2011, 04:21 AM   #3
chipper is offline chipper  United States
diyAudio Member
 
Join Date: Oct 2008
Location: Los Angeles
Send a message via MSN to chipper Send a message via Yahoo to chipper
I can use this one, right?

Digi-Key - IRF540ZPBF-ND (Manufacturer - IRF540ZPBF)

And this one too?

Digi-Key - IRF9540NPBF-ND (Manufacturer - IRF9540NPBF)
__________________
Feel the PUNCH
  Reply With Quote
Old 1st January 2011, 04:31 AM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
I can't explain why the N version won't work so I won't say that anything will work that I haven't used.

Arrow has both parts (IRF540A and IRF9540PBF).
  Reply With Quote
Old 3rd January 2011, 01:43 AM   #5
chipper is offline chipper  United States
diyAudio Member
 
Join Date: Oct 2008
Location: Los Angeles
Send a message via MSN to chipper Send a message via Yahoo to chipper
How do you post up pictures?
__________________
Feel the PUNCH
  Reply With Quote
Old 3rd January 2011, 01:57 AM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Click the 'go advanced' button below the 'quick reply' field. Then select 'manage attachments' on the new page.
Attached Images
File Type: jpg manageattachements01.jpg (271.3 KB, 48 views)
  Reply With Quote
Old 3rd January 2011, 02:14 AM   #7
chipper is offline chipper  United States
diyAudio Member
 
Join Date: Oct 2008
Location: Los Angeles
Send a message via MSN to chipper Send a message via Yahoo to chipper
Thanks for the info. Anyways heres the Punch 75.2 that kinda exploded on the output side. Any idea what caused this? It blew out on the P-channel side i used some fets from another dead amp for testing and i pushed it with a 4 ohm subwofer bridged with gains umm i'd say 75 percent and was bumping good but it exploded all of a sudden it blew??. I ordered some new IRF540s and IRF9540 i baught 8 total new fets just in case something were to happen.


EDIT: the burned up holes for the legs of the fets on the P-channel side fet it burned up by itself, how? i don't know?? And when installing new ones could i hard wire the leg of the fet to???? Thanks
Attached Images
File Type: jpg repair 1.jpg (103.1 KB, 42 views)
File Type: jpg repair 2.jpg (119.0 KB, 41 views)
File Type: jpg repair 3.jpg (101.2 KB, 41 views)
__________________
Feel the PUNCH

Last edited by chipper; 3rd January 2011 at 02:23 AM.
  Reply With Quote
Old 3rd January 2011, 02:46 AM   #8
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The connection likely became intermittent and began arcing. That would have caused the connection to heat up and burn.

You'll have to cut away the burned board, it's likely conductive.

You can hardwire the connections to the drain and source legs. You'll have to clean it up to see exactly where each one connects. The source connects to the resistor. The drain connects to the rail.
  Reply With Quote
Old 3rd January 2011, 03:02 AM   #9
chipper is offline chipper  United States
diyAudio Member
 
Join Date: Oct 2008
Location: Los Angeles
Send a message via MSN to chipper Send a message via Yahoo to chipper
Hmmm thats what i fugured, I was using a fairly large tip solder iron when i stuck in those fets. Would it be ideal to replace all four transistors? Or can i use the other two in there still.
__________________
Feel the PUNCH
  Reply With Quote
Old 3rd January 2011, 03:20 AM   #10
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
There are only two in that channel. If the other channel is working, there's no reason to replace the outputs.
  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
Rockford Fosgate dtisme Car Audio 1 5th October 2010 11:39 PM
About rockford fosgate 1500bd RICKY01AGUAS Car Audio 19 28th June 2009 12:28 AM
rockford fosgate 200x2 spooney Car Audio 7 17th May 2009 08:50 PM
Rockford fosgate sub opinons bangin out Car Audio 6 29th March 2006 03:42 AM


New To Site? Need Help?

All times are GMT. The time now is 08:38 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