400 Series Enclosures IPB

This document is an Illustrated Parts Breakdown (IPB) manual for Digital Equipment Corporation's 400 Series Enclosures, including models like BA440, BA430, R400X, and B400X.

Its primary purpose is to comprehensively identify and list all parts and assemblies for these enclosures, aiding in the identification and ordering of replacement components. The manual is organized hierarchically, reflecting engineering drawing structures, and features:

• Detailed illustrations of various assemblies (e.g., pedestals, chassis, doors, fan assemblies, bulkhead assemblies).
• Indented parts lists that show the subordination of parts using asterisks (* for major assembly, ** for sub-assembly).
• Specific columns for Digital Equipment Corporation part numbers, ECO (Engineering Change Order) cut-in levels, and "Used On" codes to indicate part applicability across different product variations (e.g., with or without skins).
• Identification of Field Replaceable Unit (FRU) level parts.
• A Part Number/Description Index for easy lookup.

It also includes a revision history and references to related IPB information for other system and mass storage components.