Product: Service Manual for Yamaha RY20 Rhythm Programmer. Approximately 52 pages with full size continuous Circuit Diagrams. Offered in PDF format.
CONTENTS:
Specifications
Panel Layout
Circuit Board Layout
Block Diagram
Disassembly Procedure
LSI Pin Description
IC Block Diagram
Circuit Boards
Test Program
Total Reset Procedure
LCD Messages
MIDI Data format
MIDI Implementation chart
Circuit Diagram
Parts List
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