MP01230 RTP20 Engineering Drawings Dec80

This document is a "Field Maintenance Print Set" (MPØ1230) published by Digital Equipment Corporation in 1980, serving as a comprehensive guide for maintaining their RTP20 and RP20 disk drive systems.

It includes:

1. Table of Contents: An overview listing all included documents.
2. Drawing Directories: Catalogs all relevant drawings for the main RTP20 system and its various sub-components (RH20, DX20, RP20-A, RP20-C, RP20-D, RP20-H). These directories also outline "Unit Variations" such as master/slave, dual/single port/access, and different frequencies (50Hz/60Hz).
3. Parts Lists and Ship Lists: Detailed inventories of components for various configurations, specifying part numbers, descriptions, and quantities required for different system variations (e.g., master/slave drives, dual-port upgrade kits, single access DCUs, varying capacities like TOPS 10/20).
4. System Layout and Cabling Diagrams: Visual and descriptive guides for physical subsystem arrangement (e.g., master and slave drive placement rules) and detailed system cabling, illustrating interconnections between controllers, drives, and power supplies for single port, dual port, and dual access setups.
5. Engineering Specifications and Procedures: Step-by-step instructions for:
   • RP20 Dual Port Installation: Covers initial checkout, DCU addressing, EPO and dual port/disk drive cabling, control module jumpers, and in-line diagnostics.
   • RP20 Address Update/Verification: Details the process of configuring and verifying system address tables using data switches and a printer.
   • RP20 Dual Channel Installation: Outlines procedures for initial checkout, DCU addressing, EPO cabling, RP20-H specific checks, dual channel cabling, and diagnostic tests.

The document is designed for field service engineers, providing the necessary information—from high-level overviews to specific component lists and detailed installation procedures—to install, configure, and maintain various configurations of the RTP20 and RP20 disk drive subsystems.