Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 10th February 2010, 12:37 AM   #1
diyAudio Member
 
Join Date: Feb 2010
Location: Minnetonka, Minnesota
Default Kole KX1-5500D in protect mode. Shorted diode?

This car audio amp was in my car before I got my 2 AP30001D's. I was shredding CD's with the port on my box. (If you dont know what I mean, youtube it..) Anyways, a piece of the CD film managed to make it's way to the circuit board and short out something on the amp. I heard it go pop and a little bit of smoke. The Amp instantly went into protect mode.

Click the image to open in full size.

Click the image to open in full size.

Anyways..
I took the board out of the heatsink and desodered diodes D325 and D326. On diode check mode with the multimeter, they allow current to pass both ways... I believe the CD piece allowed a capacitor to short to the diodes.

Click the image to open in full size.

I was wondering if there are any other components you guys think I should remove and test that might have also been affected.

FR104 Datasheet
http://www.datasheetcatalog.org/datasheet/surge/FR104.pdf

Thanks in advance for helping out! Im a noob at this.
-Mike
  Reply With Quote
Old 13th February 2010, 03:14 AM   #2
diyAudio Member
 
Join Date: Feb 2010
Location: Minnetonka, Minnesota
anyone?
  Reply With Quote
Old 13th February 2010, 01:41 PM   #3
baga is offline baga  Romania
diyAudio Member
 
Join Date: May 2005
I think that the burned components are rectifying the power supply for the driver of high side mosfets.Try to connect a power supply between vcc and vppd,12 to 15v,floating, - to vcc ,+ to vppd .Use a 100 ohm resistor for current limiting..If the amplifier is working,you can change the diodes.If the amplifier is not working you may have other damaged components,probably in the driving stage for mosfets.Please note that i am not 100% sure about what i 'm saying.
  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
Onkyo TX-SV444 goes into protect mode morgangdfp Solid State 2 28th January 2009 12:46 PM
Orion 2500D trouble shooting- protect mode Scanlines Car Audio 5 30th July 2008 10:59 PM
Help....PPI 2360 won't come out of protect mode ??? kombos Car Audio 11 11th July 2007 01:20 AM
Kole Audio Amp Problem...HELP dozan1 Car Audio 4 14th February 2007 06:51 AM
onkyo amp txsv717 not working(protect mode) Tabatha Koger Parts 0 3rd February 2005 09:25 PM


New To Site? Need Help?

All times are GMT. The time now is 10:12 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