Discussion about the Korg PolySix synthesizer

All the lights of the Bank as well as 1, 2, 3, 4 remain lit

 

=  setting klm-376 connect a 56 ohm 2p  ‘2pin’ for klm-376

Service manual  throughout the procedure and explain

 

Octave button not working  = the battery is necessarily a track cut or IC30
or 31 no longer works

 

LFO = IC21 13600 

 

Voice 5 seems dead. A swap of both = 2044 SSM   or diode led

 

Sub-osc = ic 13600

 

www.audio-synth-vintage.com

 

@+

philippe

 

 

De : PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] De la part de
7yash
Envoyé : lundi 8 octobre 2012 18:14
À : PolySix@yahoogroups.com
Objet : [PolySix] Polysix restoration: LEDs, Sub-Osc LFO issues.

 

  

I am trying to restore a good old Polysix which suffered from the usual
battery leakage and need some help to see on what areas I should focus. It
has a KLM-367 board.

The battery was removed and the board cleaned up. The traces appear good,
but I should test for continuity for sure. I re-populated the board, and did
hear the Arpeggiator work with a nice sound. I could get Cutoff, Resonance
and the Envelope to work.

What does not work:

- All Bank LEDs as well as 1, 2, 3, 4 remain ON.
- Found stays ON
- LFO appears to always act upon the pitch
- Voice 5 seems dead. A swap of both SSM chips on that segment did not
change a thing
- Sub-osc does not seem to work
- Octave button does not seem to work

Any help on what to look for and procedures would be most welcome.

Yash





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