CBS/Fender released eight of these occasional notes through 1982 and 1983. They range in topic from purely informational (seminar announcements for fall 1982; a note about a stolen Chroma) to technical. A brief summary of the notes:
SN2-001 - Cassette Load Programs: If you are using a cassette recorder and the Chroma fails to control the motor, check the polarity of the motor leads.
SN2-002 - Seminar: Training sessions in San Francisco and Denver.
SN2-003 - Stolen Chroma!: Information about an instrument stolen in September 1982.
SN2-004 - Signetics Chips: substituted for TI chips in some Chromas, may not function reliably in certain circuits.
SN3-006 - Analog & Autotune: The Auto-Tune functions operate closer to center range when the +5 volt analog supply is adjusted slightly on the high side.
SN3-007 - I/O Strobe Decoder: Unexplained program parameter changes, and spontaneous triggering of the tapper, have been traced to the the I/O Strobe Decoder.
SN3-008 - Primary Fuse: Substitution of higher rated fuses.
Thanks to Christopher Now for providing a few bulletins I was missing.