RA81 DISK DRIVE

This document is an Illustrated Parts Breakdown (IPB) for the RA81 Disk Drive, designed to help users identify and order parts. The initial section, "HOW TO USE THE IPB," details the manual's organization, nomenclature, and conventions. It explains the Major Assembly Locator (an index of illustrations), the Indented Parts List format (using asterisks for subordination), and defines each column in the parts lists (Figure & Item, Description, DEC Part No., ECO Cut-In, Vendor Code/Part No., Used On Code, and Ref Fig No.). Special symbols for hardware designators, attaching hardware, and non-field repairable items are also explained.

The document includes a revision history and lists other required IPB manuals. The main content comprises numerous illustrations (figures) depicting exploded views of various RA81 Disk Drive assemblies and subassemblies. Each figure is accompanied by a detailed parts list table, providing comprehensive descriptions, Digital Equipment Corporation (DEC) part numbers, ECO cut-in information, usage codes indicating compatibility with different option variations, and cross-references to other figures for deeper breakdown. Assemblies covered range from the overall disk drive to specific components like the HDA-R/W module, logic chassis, motor assembly, cabinet structures, and various panels and brackets.