Emax

check for dry joints on the key contact board and the first diode for that octave
  ----- Original Message ----- 
  From: cheju_99 
  To: emax@yahoogroups.com 
  Sent: Tuesday, July 17, 2012 12:55 PM
  Subject: [emax] Re: Five top keys fault


    
  i have exactly the same problem, replace the scan chip with a new one with no success, you finally fixed?.

  --- In emax@yahoogroups.com, "jammie" <jammie.emma@...> wrote:
  >
  > actually i can be the scanner chip iv had it when you can play notes on kewyboard but when pressing buttons its arratic and jumps allover the place
  > ----- Original Message ----- 
  > From: emax_dx5 
  > To: emax@yahoogroups.com 
  > Sent: Monday, July 09, 2012 2:59 PM
  > Subject: [emax] Re: Five top keys fault
  > 
  > 
  > 
  > I won't go for the MPU Scanner (IM386). When it fails, no button or key usually work.
  > 
  > You said you sent midi to the Emax and it made sound. Did you check the MIDI OUT commands the emax is sending? you can do it both with a Midi analyzer on your computer or using the function MIDI Scope. Check if it sends Key ON and OFF commands or not. If any of those cases:
  > 
  > Go to the keyboard Printed Circuit Board. ONce you already checked diodes, Check continuity on the traces involved with those keys (a multimeter will do the job). If a common ground trace is open, this fault uses to happen.
  > 
  > hope it helps.
  > 
  > Best.
  > Jose
  > 
  > 
  > 
  > 
  > 
  > [Non-text portions of this message have been removed]
  >



  

[Non-text portions of this message have been removed]