Illustrated Parts Breakdown VAX 4000 Model 400

This document is an Illustrated Parts Breakdown (IPB) for the VAX 4000 Model 400 System.

Purpose: Its primary purpose is to enable users to identify parts and their physical locations within the VAX 4000 Model 400 hardware.

Structure and Content:

1. Illustrations (Figures): The manual contains detailed drawings of the system and its major assemblies (e.g., the 675QJ Pedestal System and the H3604 Console Bulkhead Assembly). Parts within these illustrations are identified by numeric callouts.
2. Parts List: Corresponding to the figures, the parts list provides detailed information for each numbered item, including:
   • Figure and Item Number
   • Description (indicating if an item is a subassembly or subordinate part)
   • DEC (Digital Equipment Corporation) Part Number
   • ECO Cut-In (Engineering Change Order revision level)
   • "Used On" Code (for product variations)
   • Reference Figure Number (for cross-referencing)
3. How to Use: Users are instructed to first locate a part in the figure, identify its callout number, and then find that number in the associated parts list for details.
4. Indexes: The document includes comprehensive indexes organized both numerically by DEC Part Number and alphabetically by Part Description, referencing the figure and item number for easy lookup.
5. ECO/Revision History: A table details the revision history for key assemblies.
6. FRU Indication: The illustrations specifically mark Field Replaceable Unit (FRU) level parts.

The document also includes legal disclaimers, trademark information (e.g., VAX, Digital), and a reader's comments form.