Vintage Synth Repair

Have you checked frequency on the supply line?  It is AC you know...

Scott

  ----- Original Message ----- 
  From: NoëlBuhagiar 
  To: vintagesynthrepair@yahoogroups.com 
  Sent: Monday, July 16, 2012 4:08 PM
  Subject: Re: [vintagesynthrepair] Backlight Revisited...


    

  Hi,

  You could have low voltage at step-up transformer output.
  Transformer could have developed shorted turns.

  Do the oscillator transistors get hot?

  Good luck,
  Noel


  From: Quazimodo 
  Sent: Monday, July 16, 2012 6:52 PM
  To: vintagesynthrepair@yahoogroups.com 
  Subject: [vintagesynthrepair] Backlight Revisited...

    
  Hi folks,

  I wonder if anyone has any ideas about this one.

  I bought a new backlight for this Korg Wavestation EX... it didn't work. I checked the pins on the power supply feeding it... and it lit up one of those neon A/C test screwdrivers.

  So I assumed the light was faulty and got a replacememt. Today I wired up the new backlight - on a loose wire, just to make sure it works and... nothing!

  I am getting power on the connector... and I have two backlights that don't light on it.

  Any ideas/suggestions please...?
  Cheers,
  TOM