Maintenance Manual PDP-9/L Volume II

This document is Volume II of the Maintenance Manual for the Digital Equipment Corporation PDP-9/L computer system. It provides a comprehensive collection of engineering drawings for the basic PDP-9/L system, serving as a critical technical reference for maintenance and understanding the system's design.

Key contents include:

• Engineering Drawings: A complete set of drawings for the core PDP-9/L system, noting that furnished drawings with the machine take precedence in case of discrepancies.
• Drawing Codes and Conventions: Explanations of Digital Equipment Corporation's encoding system for drawing types (e.g., Block Schematics, Assembly Drawings) and conventions used in block schematics, which combine signal flow, logic functions, circuit types, and physical locations.
• Signal Mnemonic Index: A detailed alphabetical listing of all signals originating in the PDP-9/L, including their source (specific logic drawing) and description.
• Detailed Drawing Index/Table of Contents: Organized sections covering various components such as PDP-9/L Assembly, Power Supply and Distribution, Memory (MC71-A), Central Processor, and I/O components, with specific drawing numbers and titles.

The manual is designed to help users understand the system's internal workings, facilitate maintenance, and provide detailed insights into its electrical and logical interconnections.