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JLCooper ChromaFace Schematic

I contacted JLCooper Electronics and to ask if they had any remaining information on their (ancient) MIDI retrofit for the Chroma. Joe Uribe in Product Support kindly wrote back and sent the schematic available below.

Brian McCully writes that there may be an error in this schematic: see his note in the write-up for 21030361.

Joe writes, "I asked around and was only able to dig up this schematic. Unfortunately, since this product is long out of production, I will not be able to support it or answer any questions about it. If fact, I'm not sure how accurate the schematics are so I can't make any guarantees about this information." [February 2010]