MoogArchives.com Forum Index MoogArchives.com
Vintage Moog Information Exchange
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Memorymoog pot problem

 
Post new topic   Reply to topic    MoogArchives.com Forum Index -> Memorymoog
View previous topic :: View next topic  
Author Message
eggwheat



Joined: 27 Aug 2008
Posts: 3

PostPosted: Wed Aug 27, 2008 10:02 pm    Post subject: Memorymoog pot problem Reply with quote

I've been bringing a Memorymoog with lots of faults back from the dead but I'm left with one last fault.

It's one of those niggling annoying problems that seems to be undetectable...its driving me nuts..I'll try to explain it better.

Basically you turn a pot on this synth and the pots value is shown on the alpha/dec LED display, you turn the second pot the display instantly shows that pots value..so far so good...but after a few turns of various pots, it will stick on a value and won't change with the new pot movements, pressing buttons, turning other pots wont get rid of it(you can see the correct values flickering behind it)..even turning it on and off. You have to go back and find the pot thats got the value 'stuck'. Zero that pot and it's fine again. It's totally random and depends on the combination of pots and values. The actual sound itself changes fine with the pot movement. It's just the displaying of the values that is a bit screwed. Its like the displayed values are ocassionaly not being cleared from memory somehow.

Remember is the physical displaying of the values that gets stuck, not the actual values that control the analogue parameters. They are working fine.

I wont tell you what Ive already done in case it influences your diagnosis..lets just say I have tried a lot of things!

If anyone can help I'd really appreciate it, the schems are here: http://www.matrixsynth.com/blog/media/Moog/MemorymoogSchematics/

The service manual is here: http://www.retrosynth.com/docs/memorymoog/mm_service.pdf

Apart from this fault..it seems to be almost fixed.

Thanks, Phil.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    MoogArchives.com Forum Index -> Memorymoog All times are GMT - 5 Hours
Page 1 of 1

 
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


Powered by phpBB © 2001, 2005 phpBB Group