Vintage Synth Repair

Suspect IC34 near CN6 on the mainboard (upper right part of the schematic).
Possibly IC46 near CN9 and CN10, but then it looks like you'd have keyboard problems too.
IC53 (only individual gates visible on schematic) also involved.

Or, perhaps simply a bad connector.

BR,
Peter


  ----- Original Message ----- 
  From: Nick Bell 
  To: vintagesynthrepair@yahoogroups.com 
  Sent: Saturday, December 22, 2012 5:12 PM
  Subject: [vintagesynthrepair] Re: Roland JX3P Faulty


    

  Oh, I've quite possibly overlooked something on the schematics then? If you have time the service manual is here: http://fa.utfs.org/diy/jx3p/jx3p_schem.htm