This document is a comprehensive Field Maintenance Print Set for the Digital Equipment Corporation PC100-B computer system, dated 1984. It provides detailed technical documentation for maintenance and understanding of the system's hardware. The set includes a table of contents, assembly and interconnection diagrams illustrating the physical layout and wiring of various components, and extensive parts lists for the overall PC100-B system, its mother board, the CPU assembly (Rainbow 100), and the RX50 controller board. Detailed circuit schematics are provided for both the PC100-B Mother Board and the RX50 Controller Board. Additionally, the document outlines specifications for various PC100 configurations (e.g., PC100-A, PC100-B2 through -B7), detailing CPU types (Z80 & 8088), RAM capacities (64KB, 128KB), display characteristics (24x80/132), floppy drive types (Rx50), available ports (printer, async/sync), and different voltage and language options. Each major section also includes revision histories.