Emax

bad signal diode can take out all keys in that octave

as seeing your getting midi to trigger 

the scanner cpu deals with the keyboard and  the buttons

youcould have a bad scanner chip

but check the contact board starting at the c#5 key trace the diode

for that key and test if its working
 
  ----- Original Message ----- 
  From: jaumemod 
  To: emax@yahoogroups.com 
  Sent: Sunday, July 08, 2012 10:14 PM
  Subject: [emax] Five top keys fault


    
  Dear folks,

  My Emax II top 5 range keys faults (from G#5 to C6) no sounds.

  Playing on MIDI master keyboard there's no problem, all seems to be ok, all sounds.

  I checked contact springs and seems to be ok. Only when I use a plastic stick to move spring over contact with a key previously played all sounds...until I back to turn sampler in upright position.

  I cleaned all contact springs and contact base. I checked keyrange board and all contact ways on board. All seemed to de ok for me.

  I checked all keyrange connectors to mother board: Ok

  Maybe I need to know what parts of sampler are involved in keyrange operation to checked something else....I don't know....



  

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