MP00178 MH10 Schematic Aug76

This document is a technical manual for the MH10 Field Maintenance Print Set from Digital Equipment Corporation, published on July 20, 1976. It provides a comprehensive set of documents for servicing and understanding the MH10 Core Memory system.

The document includes:

• Table of Contents (Page 1): Lists all included drawings and their descriptions, covering everything from system organization and memory flow to detailed logic diagrams, data bits, and drive mechanisms.
• Unit Variations (Page 1 and 3): Details the specific MH10 and MC14-G unit configurations covered by the print set, including different memory sizes and voltage requirements.
• Organization and Usage Guidelines (Page 12): Explains how the prints are ordered and how to use them for troubleshooting, emphasizing the logical flow from high-level diagrams to detailed component schematics.
• System Diagrams and Schematics (Pages 13-117): Includes numerous diagrams and schematics for various components and functions of the MH10 system, such as module utilization, memory cycle flow, timing diagrams, interconnection block diagrams, data bits, address registers, and sense/inhibit logic.
• Power Supply and Regulator Details (Pages 175-203): Provides diagrams and parts lists for the H7420, H744, H754, and H770 power supplies and +15V regulators.
• Component and Parts Lists (Pages 185-231): Offers detailed lists for various assemblies and sub-assemblies, including memory, power control, main circuit boards, and external components, often with quantities and variations.
• Assembly and Installation Information (Pages 204-218): Contains information on the assembly, wiring, and installation of various components, including the Core Memory cabinet, fan assembly, and switch plate assembly.
• Engineering Specifications (Pages 227-229): Includes details on additional access port options and acceptance test memory systems.