Damage recovery - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

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
Thread Tools Search this Thread
Old 30th March 2005, 10:15 PM   #1
Reklats is offline Reklats  United States
diyAudio Member
Join Date: May 2004
Location: Ohio
Send a message via AIM to Reklats
Question Damage recovery

I built a parallel LM4780 channel with some old parts I had lying around, including an old athlon cpu heatsink with the mounting bracket still attached. I also didn't isolate the chip from the heat sink, since I didn't have anything handy to do it with (this was a bad idea).

It was hooked up playing music on a test speaker when the mounting bracket (at V-) moved in a way I didn't realize it could, and reached under the board and hit the V+ rail. Sparks flew, I was right there, and I snatched the plug out of the wall in less than a second, before the slow blow fuse went. (I was using a 3.15 amp fuse, probably too much, huh?)

I hooked the amp up to a 12V AC power supply with good protection to see if it survived, the power supply wouldn't turn on ie. there's a short somewhere. My question: Where should I start checking for damage? Nothing is visually damaged except for the end of the bracket where it hit the V+.
  Reply With Quote
Old 31st March 2005, 02:42 AM   #2
diyAudio Member
Russ White's Avatar
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Very likely the chip is dead. Is this P2P or on a PCB? If its PCB check for vaporized traces.
  Reply With Quote


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
Fast recovery diodes help / advice please ? AndrewGM Solid State 17 15th April 2009 09:39 PM
Bad experience with Advanced Recovery INC gaborbela Everything Else 2 20th December 2007 04:59 PM
Parts recovery from PCs? TDWesty Chip Amps 3 10th January 2007 05:30 PM
Overload recovery lndm Tubes / Valves 28 12th May 2006 12:11 AM

New To Site? Need Help?

All times are GMT. The time now is 08:15 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2