Crumar CPB-1 -1978?

User Manual: unknown if available
Reset Proceedures: N/A
Operating System code: N/A
MIDI or other control protocol: N/A
Software related Links: N/A
Patches or knob settings:
Circuit Overview: below
Scematics/Service Manual: Manual Manor
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: MK50240 TOS, SJ110 7 stage divider.
General Info Links: Vintage Synth Explorer

Circuit Overview:
     Divide down circuit with selections for 16' and 8'passive filtered waveforms. Sounds like an organ bass as one would expect. Fairly rare I think. I worked on serial #A44 and mostly likely it was as with the DS-1 where the -2 quickly followed with some improvements.

Service Tips:
      Get a headphone amp or something to listen to each pin of the TOS to make sure frequencies aren't missing. Go to Organ Service corps TOS page for a diagram of the pinout of SAJ110 and also verify those.
     Otherwise just dirty issues usually on these unless they're abused. Or eventually probably failing electrolytics. The Italians seemed to get better ones than some others though. I don't see many problems with them yet.

I have the TOS. Organ service corp has SAJ110 last I checked. Recommend getting SAJ210 or SAA1004N for better reliability
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