LP20 Line Printer System

This document is a field maintenance print set for the LP20 line printer system, identified by print set order number MP00006. It provides a comprehensive collection of engineering drawings and specifications necessary for the installation, maintenance, and troubleshooting of the LP20 system. The contents include:

• System Overview: A detailed drawing directory and table of contents listing all relevant modules.
• Control Logic: Detailed schematics for the controller, including UNIBUS control, NPR clock, and interrupt logic.
• Data Handling: Comprehensive diagrams for data paths, RAM address, translation RAM, and line printer control logic.
• Hardware Details: Wiring lists, backplane assembly diagrams, and power supply wiring instructions.
• Module Configuration: Specific instructions for jumper and DIP switch configurations (e.g., M8587 vs. M8571 module compatibility).

The document is intended for authorized service personnel and contains proprietary information regarding the manufacture and repair of the LP20 system.