Rockford Fosgate Punch 800.2 - 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 30th November 2012, 03:17 AM   #11
timwebb is offline timwebb  United States
diyAudio Member
 
Join Date: Jan 2010
Location: memphis tn
i havent worked on many of the older models. where u get those boards from to mount the transistors on? i seen some so badly damaged i kinda stayed away from them.
  Reply With Quote
Old 30th November 2012, 03:23 AM   #12
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
They are not really available anymore, I aquired a bunch lol and I have probably a 100 or so parts boards. If you ever need any I cant gaurantee I will have it but good chance.

The only time you ever really see them messed up is if someone has tried to pry the fets off and ripped the solder pad off or they have overheated it and the ruined the solder pad. If the MESHA board pad is loose or missing it is garbage.....you can cut and patch but it looks horrible.

I have just removed them on several Rockford amps and used Kapton tape and clamps and screws like the old DSM amps used. Alot of the DSM clamps will lign up with the holes in the newer amps (2003 and older newer). The MESHA board is not a must for the amp to function.
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch
  Reply With Quote
Old 30th November 2012, 04:51 AM   #13
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
supply is complete have not powered yet. Looks alot better, new fets, new gates, new drivers!!!
Attached Images
File Type: jpg 800.2 supply 001.jpg (977.8 KB, 59 views)
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch
  Reply With Quote
Old 30th November 2012, 04:52 AM   #14
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
Have not cleaned off excess flux yet and soldered the 100 ohm resistor on after pic, my bad.
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch
  Reply With Quote
Old 30th November 2012, 05:23 AM   #15
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
OK powered up the supply and it powers up for 3 seconds then starts pulsing up to 40 amps current draw then to zero over and over?

Bias pots are all the way down, source resistors and output fets are removed from defective channel.

Could something in the protection circuit from the faulty channel cause this or do I have more issues in the supply?

Should I remove the rectifiers and try to power again?

I have a nice square wave on all of the gate legs of the power supply fets.
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch

Last edited by seankane; 30th November 2012 at 05:27 AM.
  Reply With Quote
Old 30th November 2012, 05:29 AM   #16
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Are the power supply FETs heating evenly?

Is the board conductive where it's blackened next to the capacitor?
  Reply With Quote
Old 30th November 2012, 05:44 AM   #17
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
The board does not seem conductive, the p/s fets dont seem to be heating at all but I am only powering it for 5 seconds at a time.
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch
  Reply With Quote
Old 30th November 2012, 05:54 AM   #18
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
The output fets in the non-defective channel are getting hot?
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch
  Reply With Quote
Old 30th November 2012, 05:56 AM   #19
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Try twisting the transformer to see if it makes a difference in the current draw.

Do you see it trying to produce a square wave on the drains of the FETs or does the drain remain very near 12v and straight DC?
  Reply With Quote
Old 30th November 2012, 05:58 AM   #20
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Ignore post 19 then.

Do you see the same DC voltage across each of the source resistors in that channel? Or is one higher and one lower than the others?
  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 punch 800 a2 ernie cosillos Car Audio 3 12th June 2011 01:41 AM
Fosgate Punch 800 a4, diagram needed camoandbee Tubes / Valves 0 13th April 2011 06:33 PM
Rockford Fosgate 800.2 Brain Fried Car Audio 2 16th April 2010 05:14 PM
rockford fosgate punch z stevena2006 Car Audio 2 23rd December 2009 04:20 PM
Rockford Fosgate Power 800.4 lostamps Car Audio 6 2nd January 2008 12:21 PM


New To Site? Need Help?

All times are GMT. The time now is 08:14 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