SPL FX1-5500D Goes into protect - 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 April 2012, 12:28 AM   #1
diyAudio Member
 
Join Date: Oct 2010
Location: Florence, Alabama
Default SPL FX1-5500D Goes into protect

It is in protect when powered up , power mosfets in circuit are shorted from drain to source.. I pulled one and it checks good out of circuit, assuming the rest would be ok but I check diodes D330 D331 D332 and D334 and they check open both ways in circuit , havent removed any to test yet , could these be the culprit?
  Reply With Quote
Old 30th April 2012, 12:31 AM   #2
diyAudio Member
 
Join Date: Oct 2010
Location: Florence, Alabama
Click the image to open in full size.
  Reply With Quote
Old 30th April 2012, 05:11 AM   #3
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Do any of the power supply FETs read low resistance from leg 1-2?

HAve you checked the large diodes near the power terminals?
  Reply With Quote
Old 30th April 2012, 08:40 AM   #4
diyAudio Member
 
Join Date: Oct 2010
Location: Florence, Alabama
checked reverse polarity diodes they are good ,ill check resistance and let you know on fets
  Reply With Quote
Old 1st May 2012, 01:40 AM   #5
diyAudio Member
 
Join Date: Oct 2010
Location: Florence, Alabama
All power mosfets read 18+ Mega Ohms across legs 1-2
  Reply With Quote
Old 1st May 2012, 05:08 AM   #6
diyAudio Member
 
Join Date: Jun 2011
Location: Manila
Quote:
Originally Posted by bigpun4fubu View Post
All power mosfets read 18+ Mega Ohms across legs 1-2
I think it looks good. might try to do the same test to the output MOSFET.
  Reply With Quote
Old 1st May 2012, 06:49 AM   #7
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
That would almost certainly mean that all of the power supply FETs are OK.
  Reply With Quote
Old 1st May 2012, 11:43 PM   #8
diyAudio Member
 
Join Date: Oct 2010
Location: Florence, Alabama
the output fets on upper right of photo are shorted so surely this would be the problem
where can i locate the drivers? to check those?
  Reply With Quote
Old 2nd May 2012, 01:01 AM   #9
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
When you stated that the 'power FETs' were reading shorted, I assumed (mistakenly) that you were referring to the power supply FETs.

The drivers for the audio output transistors are likely on the vertical board.
  Reply With Quote
Old 2nd May 2012, 01:33 AM   #10
diyAudio Member
 
Join Date: Oct 2010
Location: Florence, Alabama
ok ive located the problem the 5 bad outputs,i removed them and it powers up with a green light
  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 Acoustic OVN1-5500D mike49504 Car Audio 14 29th February 2012 11:25 AM
Power Acoustik PS1-5500D m4ick Car Audio 20 22nd December 2011 02:28 AM
power acoustik ps1-5500d bdgf2004 Car Audio 7 14th September 2011 05:16 PM
Power Akustic LFA1-5500D Simbalage21 Car Audio 4 29th April 2010 10:39 PM
Kole KX1-5500D in protect mode. Shorted diode? barros57 Class D 2 13th February 2010 01:41 PM


New To Site? Need Help?

All times are GMT. The time now is 10:59 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