Shorted capacitor terminals on a board? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 27th April 2010, 12:34 AM   #1
mtl777 is offline mtl777  United States
diyAudio Member
 
Join Date: Oct 2007
Default Shorted capacitor terminals on a board?

Hey guys, sorry for this newbie question. Is it possible to have a good working circuit in which the (+) and (-) terminals of a capacitor are shorted? I'm wondering because a board that I'm working on has a capacitor whose terminals are shorted when I check with the DMM, but I can't see any visible traces connecting the (+) and (-) terminals. I don't have a schematic and will have to remove a LOT of components to be able to trace the circuit, which I wouldn't want to do, and besides, the board is double layered and difficult to trace.

Even when I remove the capacitor and check for continuity between the two holes where the capacitor was soldered, I find that they are shorted. I'm wondering if I accidentally shorted something else in the circuit that is causing this capacitor to short. It seems strange to me, but then I am new to this. I would be more than happy to know that this is possible and is normal on some circuits.

Your help would be very much appreciated! Thanks!
  Reply With Quote
Old 27th April 2010, 01:57 AM   #2
diyAudio Member
 
lanchile's Avatar
 
Join Date: Sep 2008
Location: AREA 51
Did you check around the cap if there is a transformer near by? I say this because sometimes there are many parts that when you read a cap you are reading something else in the circuit too. Just take the cap out and read the cap for short not where the cap was.
  Reply With Quote
Old 27th April 2010, 03:16 AM   #3
mtl777 is offline mtl777  United States
diyAudio Member
 
Join Date: Oct 2007
Quote:
Originally Posted by lanchile View Post
Did you check around the cap if there is a transformer near by? I say this because sometimes there are many parts that when you read a cap you are reading something else in the circuit too. Just take the cap out and read the cap for short not where the cap was.
Yes, there is a transformer nearby. I checked the cap, taken out of the board, and it has no short. The two holes where the cap was are the ones that are shorted. So this is alright?
  Reply With Quote
Old 27th April 2010, 03:31 AM   #4
diyAudio Member
 
lanchile's Avatar
 
Join Date: Sep 2008
Location: AREA 51
Quote:
Originally Posted by mtl777 View Post
Yes, there is a transformer nearby. I checked the cap, taken out of the board, and it has no short. The two holes where the cap was are the ones that are shorted. So this is alright?
Yes, it is all right!. you were reading something else like the transformer or something else in the circuit.That is why I always check the caps out of boards or just unsolder one leg from board and test them. I use an ESR meter (creative Electronics) it is one of the best and accurate machine to check for dry caps.
  Reply With Quote
Old 27th April 2010, 03:36 AM   #5
diyAudio Member
 
lanchile's Avatar
 
Join Date: Sep 2008
Location: AREA 51
This is my ESR meter. http://bama.edebris.com/manuals/creative/esr
  Reply With Quote
Old 27th April 2010, 03:38 AM   #6
mtl777 is offline mtl777  United States
diyAudio Member
 
Join Date: Oct 2007
Quote:
Originally Posted by lanchile View Post
Yes, it is all right!. you were reading something else like the transformer or something else in the circuit.That is why I always check the caps out of boards or just unsolder one leg from board and test them. I use an ESR meter (creative Electronics) it is one of the best and accurate machine to check for dry caps.
That's really good to know, and gives me a great sigh of relief! Thank you so much!!
  Reply With Quote
Old 27th April 2010, 03:41 AM   #7
diyAudio Member
 
lanchile's Avatar
 
Join Date: Sep 2008
Location: AREA 51
Quote:
Originally Posted by mtl777 View Post
That's really good to know, and gives me a great sigh of relief! Thank you so much!!
I am glad I could help you.Take care.
  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
Failure in a huge capacitor board peranders Parts 70 7th January 2011 01:12 AM
Capacitor across sub terminals to reduce reactance akunec Multi-Way 4 6th May 2005 09:09 AM
Capacitor values on Aleph 5 main board. Tony D. Pass Labs 1 2nd October 2002 09:42 PM
Aleph 2: Shorted Main Board? Help! fcel Pass Labs 13 23rd July 2002 06:31 PM


New To Site? Need Help?

All times are GMT. The time now is 08:44 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