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 17th July 2011, 06:56 PM   #1
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
Default Rockford Fosgate Punch 75HD

Hello everyone.

I have a Punch 75HD with a strange issue. I recieved it for repair and it would not power on. Drew 60 amps on my power supply like it was shorted.

I replaced CR9 and CR10 and the amp powered up fine. It sat at idle for about 5 min with no issue, then all of a sudden CR9 and CR10 shorted and started smoking and it was back to drawing 60 amps on my power supply.

What could be causing this issue with CR9 and CR10? They are both IN5336B diodes. Any ideas would be great. Thanks.
__________________
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 17th July 2011, 07:36 PM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
They are 1N5366, not 1N5336.
  Reply With Quote
Old 17th July 2011, 09:43 PM   #3
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
Yes you are correct I just made a typo. I have about 50 Punch 75hd boards in a pile some look to be ok with nothing wrong but several of them have those two diodes split and burnt.

Was this a known problem?

What causes these diodes to fail, a intermittant transformer problem??
__________________
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 18th July 2011, 12:41 AM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
This tends to happen when the power supply becomes overloaded and the amplitude of the leakage inductance spikes increases. They're not required and can be left out.
  Reply With Quote
Old 18th July 2011, 12:45 AM   #5
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
What would cause the power supply to be over loaded at an idle? The output fets test ok, and the HBPIM was replaced. I replaced the 4 power supply fets as well.

What disadvantges are there to leaving them out?
__________________
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 18th July 2011, 12:49 AM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
There shouldn't be spikes at low power or at idle. Do you see excessive ringing or spikes (more than a few volts) on the top of the power supply waveform?
  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 800a4 seankane Car Audio 7 20th June 2011 07:15 AM
Rockford Fosgate Punch 200ix seankane Car Audio 2 4th June 2011 01:02 AM
Rockford Fosgate Punch 30 warpedhifi Car Audio 2 9th November 2010 04:28 PM
Rockford Fosgate Punch 325.1 Mote Car Audio 5 28th September 2010 12:51 AM
rockford fosgate punch z stevena2006 Car Audio 2 23rd December 2009 04:20 PM


New To Site? Need Help?

All times are GMT. The time now is 07:46 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