electro-music.org   Dedicated to experimental electro-acoustic
and electronic music 		 
 Front Page  |  Radio  |  Forum  |  Media  |  Playlists  |  Wiki
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 

 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
MFOS VCA troublesooting
Post new topic   Reply to topic Moderators: dnny, Uncle Krunkus, v-un-v
Page 1 of 1 [2 Posts]		 View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
lordofthebored



Joined: Aug 17, 2011
Posts: 1
Location: Champaign USA
PostPosted: Fri Oct 14, 2011 7:16 am    Post subject: MFOS VCA troublesooting
Subject description: no audio output on channel B		 Reply with quote  Mark this post and the followings unread
I was about to finish calibrating my VCA yesterday and when I powered it up channel B was no longer outputting audio signals. I followed the audio input to pin 14 of the lm13700, but there is no audio output at pin 9 or pin 12. Channel A works just fine. I did have to swap the 2K trimmer before this because I originally had the wrong value in place. Now I wonder if the IC was damaged from that replacement. Do you guys think its possible that half of the IC is cooked, or should I try to troubleshoot somewhere else in the circuit?

Thanks!
Back to top
View user's profile Send private message
Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC
PostPosted: Fri Oct 14, 2011 1:48 pm    Post subject: Reply with quote  Mark this post and the followings unread
Quote:
Now I wonder if the IC was damaged from that replacement. Do you guys think its possible that half of the IC is cooked, or should I try to troubleshoot somewhere else in the circuit?


I don't think you could hurt the IC by having a wrong trimmer value in it, and I don't think the odds of damaging half an IC are very high.

My bet is a bad connection somewhere.

Good luck
Gary
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic Moderators: dnny, Uncle Krunkus, v-un-v
Page 1 of 1 [2 Posts]		 View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum

Log in
Username:     Password:      Log me on automatically each visit    


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2026 by electro-music.org