This document is a Field Maintenance Print Set for Digital Equipment Corporation systems, primarily detailing the PC100 "RAINBOW" system and including a dedicated section for the BA25 small system unit enclosure. It provides comprehensive technical information for maintenance and repair, comprising detailed parts lists, wiring charts, and schematic diagrams for various components.

For the PC100, the document covers the Mother Board (including clock, video, memory, CPU, communication, printer, and diagnostic circuits), RX50 Controllers, and CPU assemblies. For the BA25, it details the small system unit enclosure, including riveted assemblies, fan brackets, power supply, dual floppy disk drive, and associated harnesses. The document also lists unit variations for both systems (e.g., PC100-A, PC100-AN, BA25-A, BA25-B) and includes copyright information from 1982/1983, stating the material is proprietary and for informational purposes only.