Sequential circuits samplers

I have some similar issues, maybe the group can help?

I've been working on my p2k, fixing a busted parameter pot, a stuck drive (with a new replacement), and upgrading the ROM to 4.3.  However, my sounds don't seem to be 
consistently firing:

Presets:
  1: no sound, any note, any time
  2: no sound, any note, any time
  3: 1,2,5,6 key presses of a note sound
  4: all good
  5: no sound
  6: all good
  7: no sound
  8: all good
  9: no sound
 10: no sound
 11: all good
 12: no sound

Do I have a pin bent or something?

Thanks everyone,
Rob


--- On Mon, 12/6/10, bobsvitilla <bobsvitilla@...> wrote:

From: bobsvitilla <bobsvitilla@...>
Subject: [prophet2000] Prophet 2000 repair help
To: prophet2000@yahoogroups.com
Date: Monday, December 6, 2010, 4:04 PM







 



  


    
      
      
      I picked up a Prophet 2000 the other day and it needs some love to get back up and running.  



What behavior will a disk drive than needs to be replaced display?  Mine powers up and the motor turns, but I can not get a sample disk to load.  I get an iF (incorrect format) message.  I am not sure if all the sample disks that came with it are corrupt.  I doubt they all would be, though I haven't tried them all.  I also was unable to format a disk MF2DD type, which I think are the same as DSDD.  



Does anyone have the schematic?



The main issue has to do with the output.  When I plug in headphones I get clean sound out the right channel only.  When I plug into an amp, I get somewhat clear sound for 1 voice and crackley noisy sound when more than 1 voice is used.  Still nothing much out the left channel, every once in a while it will sound when both mono jacks are used.



For the 1st 7 presets when I press the same key repaetedly it will sound 4 times then silent 4 times then sound 4 times, ect.  Presets 8-12 will sound for all key strikes.



Thanks for any help,

Bob