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
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