VT420

This document is an Illustrated Parts Breakdown (IPB) for the VT420 Video Terminal, published by Digital Equipment Corporation in 1990.

Its primary purpose is to identify parts and their locations within the VT420 hardware product.

The document includes:

• How-to-use instructions for locating items via figures and associated parts lists.
• Organizational format details, explaining how assemblies and subassemblies are structured.

• Parts Lists that provide:

  • Figure and Item Numbers
  • Part Descriptions (indicating subassemblies with asterisks)
  • Digital Part Numbers
  • ECO (Engineering Change Order) Cut-In information
  • "Used On" Codes to specify product variations (e.g., different monitor types, voltages, regions).
  • Cross-references to other figures.

• Illustrations (e.g., the full terminal assembly, bezel assembly) with numeric callouts corresponding to the parts lists.

• An ECO/Revision History table.
• A Part Number/Part Description Index to quickly find items alphabetically by description or numerically by part number.
• Legal disclaimers regarding intellectual property, rights, and liability.