Korg MS-20 Monophonic Synthesizer Service Manual

Complete service manual for the Korg MS-20 monophonic synthesizer, an essential workshop reference for technicians maintaining or repairing this classic analog instrument. This manual provides specifications, structural diagrams, and detailed circuit schematics necessary for understanding the synthesizer's signal flow and component layout. It includes front views of both printed circuit boards (KLM-127 and KLM-128C) with clearly marked component positions, a comprehensive parts list identifying all transistors and integrated circuits, and a block diagram showing the instrument's major functional sections. The troubleshooting and adjustment procedures section covers power supply verification, pitch calibration, keyboard CV adjustment, VCF frequency tuning, and filter alignment with specific test measurement points and expected values. Whether performing routine maintenance or diagnosing circuit faults, technicians will find the detailed schematics and step-by-step calibration instructions essential for restoring the MS-20 to proper operating condition. PDF download available for immediate access.