Archive of the former Yahoo!Groups mailing list: Discussion about the Korg PolySix synthesizer

Food for thought:

I have a datasheet for the 8048H and the 8048AH. Both contain examples for
the clock circuit but both are slightly different.

Both datasheets contain identical examples for the "Crystal Oscillator
Mode". Those examples use two different caps and the following formula:

C1 (equals C22): 5pF +- 0.5pF + (STRAY < 5pF)
C3 (equals C23): 20pF +- 1pF + (STRAY < 5pF)

(There is an optional C2 cap which apparently isn't used in the KLM-367.)

Interestingly the datasheet for the 8048AH has also an example for a
"Ceramic Resonator Mode". And here both C1 and C2 are rated 33pF (+- 5%).

From the looks of it I'd say that the KLM-367 design actually calls for a
Crystal Oscillator and not for a Ceramic Resonator. That service manual
also specifies a Crystal Oscillator.