VAX 11/780 Field Maintenance Print Set

This document is the "Field Maintenance Print Set 11780" published by Digital Equipment Corporation, with copyrights primarily from 1977. It serves as a comprehensive technical guide for the field maintenance, installation, and troubleshooting of various configurations of the 11780 computer system.

The print set includes:

• Table of Contents and Drawing Directory: A structured overview and detailed listing of all included documents, covering unit assemblies, power supplies, interconnects, and various cables.
• Unit Variations: Detailed specifications for different 11780 models (e.g., 11780-CA, 11780-CC, 11780-CU, 11780-DA), outlining their specific hardware configurations, voltage, and frequency requirements (e.g., 115V/60Hz, 230V/50Hz, 120V/60Hz, 240V/50Hz).

• System-Level Diagrams:

  • A Block Diagram illustrating the high-level architecture and interconnections of major system components (e.g., various internal buses, accelerators, control stores).
  • Unit Assembly Views providing exploded and assembled physical layouts of the 11780 cabinet and its main modules (CPU, Memory, Unibus Adapter, Massbus Adapter, Power Controllers, panels, and brackets).
  • Detailed Interconnect Diagrams for different system configurations, showing the specific wiring and connections between major modules and power supplies.

• Subsystem-Specific Documentation:

  • Multiple Power Supply and Regulator Assemblies (e.g., H7101, H7102, H7103, H7104, H7105, +5.2V, +12V, +15V, +5VB Battery Regulators), including their schematics, circuit board layouts, and parts lists.
  • Power Controllers (e.g., 869-D/E) with detailed schematics and parts lists.
  • SBI Far End Terminators (e.g., M9043, M9040, TRMA) with circuit layouts, schematics, and parts lists.
  • A Floating Point Accelerator assembly.

• Component-Level Details: Extensive Parts Lists, Wire Tables, and mechanical drawings for a wide range of system cables (e.g., power cords, battery, signal, power control, over temp, Unibus options, AC/DC Low Wye), and adapter boards.

In essence, this document is a comprehensive technical manual designed to support the field maintenance and understanding of the Digital Equipment Corporation 11780 computer system.