Vintage Synth Repair

Nope, no stuck notes but the diode sounds like a place to look. Thanks for the input. 

 

________________________________
 From: jammie <jammie.emma@...>
To: vintagesynthrepair@yahoogroups.com 
Sent: Wednesday, June 27, 2012 10:54 AM
Subject: Re: [vintagesynthrepair] Alesis QS8  Note E 2 loses volume after 1 to 3 presses.
  

 
   
 
 
bad diode for that key on the contact board is the 
only surgestion i can give 
  
as you are not having this problem on any other key  
  
do you also get stuck notes when pressing this 
key 
  
never heard a qs-8 doing it 
  
but have had this happen on esq1 mirage sq1  
  
emu emax 1/2  
----- Original Message -----  
>From: brianmann01  
>To: vintagesynthrepair@yahoogroups.com  
>Sent: Wednesday, June 27, 2012 2:46  PM 
>Subject: [vintagesynthrepair] Alesis QS8  Note E 2 loses volume after 1 to 3 presses. 
>
>  
>Hi Everyone, 
>Its an ALesis QS-8 weighted keys. ( I think Fatar is the 
  maker). It works perfect except that E2 will lose volume after being played 1 
  to 3 times after power up. The condition will repeat each time I power down 
  and back up. The problem also affects the MIDI modules. 
>What I have done 
  thus far
>1. Removed the contact boards and cleaned the carbon impregnated 
  contacts on the double bubble strip
>2. cleaned the contact points on the 
  board. 
>3. Cursed a lot after trying this 3 times. 
>
>It seems like 
  its a voltage drop.I am not sure as I am not as electronically savvy as I like 
  to think. No one anywhere has posted a similiar problem that I can find. 
>There are 2 contact PC boards. The entire unit is in pristine condition 
  and there is no evidence of damage. 
>
>It drives me nuts as its exactly 
  right 1 to 3 plays and than it drops no other keys have this problem. Your 
  input about my output is appreciated. Thanks. Brian 
>
>