Repairing Rockford fosgate punch 40X2 channel help - Page 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 9th August 2010, 09:06 PM   #11
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
Quote:
Originally Posted by mike49504 View Post
They are surface mount transistors for the drivers They are usually marked 1a and 2a set your meter to diode check and test them the same way as you did the outputs. Make sure you pull the bad outputs from the board before u test them.

Also the resistors you tested marked 100 are 10 ohm resistors if you have 11 ohms on 1 and 12 ohms on the other they should be fine
Okay gate resistors are off the list, may I ask what are typical readings for drivers transistors? And emitter resistors? .001 that's what i got when i checked them. They don't look burned or anything. Also I have donor RF amp that has good working IRF540s and IRF9540s. The power supply isn't fully working so that's why it's a donator amp (:. Thanks for all the help!
__________________
Feel the PUNCH
  Reply With Quote
Old 10th August 2010, 12:57 PM   #12
diyAudio Member
 
Join Date: Sep 2009
Location: Wisconsin
They should read .1 ohms, you need to pull one leg out of the board to measure them. You may have something else shorted causing it to read low.

What does you meter read when you hook both probes together? You will need to subtract that from the measurement across the resistor.
  Reply With Quote
Old 20th August 2010, 06:00 AM   #13
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
What's the difference between IRF540 & "IRF540N" because I was browsing for some replacement MOSFETs and all I can is find irf540n's seems like they are the same type? Or can I use some from a donor amp? They still work on this donor amp. I also have a Punch 60x2 that I want to try a shot at. This one is burned up pretty bad. Also if try this can I use BUZ10 mosfets as the power supply?
__________________
Feel the PUNCH
  Reply With Quote
Old 20th August 2010, 04:33 PM   #14
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The IRF540Ns typically don't work properly in Rockford amplifiers.

If the ones from the donor amp are OK, there's no reason that they shouldn't work.

The BUZ10 isn't the best choice but they will work if you already have them. The IRFZ44 would probably be a better choice. Remember to check the gate resistors and the driver transistors.
  Reply With Quote
Old 26th August 2010, 04:41 AM   #15
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
Quote:
Originally Posted by Perry Babin View Post
The IRF540Ns typically don't work properly in Rockford amplifiers.

If the ones from the donor amp are OK, there's no reason that they shouldn't work.

The BUZ10 isn't the best choice but they will work if you already have them. The IRFZ44 would probably be a better choice. Remember to check the gate resistors and the driver transistors.
Hey!! It was a success! The amp played music nice and clear. But how do i set the bias? The left side gets a little warm so I'm not sure to set those.
__________________
Feel the PUNCH
  Reply With Quote
Old 26th August 2010, 06:50 AM   #16
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Do you have a DC amp meter on your 12v power supply?
  Reply With Quote
Old 26th August 2010, 10:22 PM   #17
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
Quote:
Originally Posted by Perry Babin View Post
Do you have a DC amp meter on your 12v power supply?
No I don't it doesn't have one it's just a 10amp 12volt powersuply. Could I use a vom?
__________________
Feel the PUNCH
  Reply With Quote
Old 26th August 2010, 10:29 PM   #18
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Yes. Can you get your meter probes on both ends of at least one 0.1 ohm source resistor in the channel that's running hot?
  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
Power supply transistors for Rockford punch 40x2 chipper Car Audio 4 22nd March 2010 03:56 AM
Fosgate Punch 40x2 chipper Car Audio 11 23rd January 2010 03:07 PM
rockford fosgate punch z stevena2006 Car Audio 2 23rd December 2009 04:20 PM
Worth repairing a Rockford Fosgate Punch 60.2? wpc Car Audio 14 1st July 2009 06:25 PM
Rockford Fosgate Punch 360a2 dawkins Car Audio 1 6th April 2006 05:27 PM


New To Site? Need Help?

All times are GMT. The time now is 03:52 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