Illustrated Parts Breakdown LA120 DECwriter III

This document is an Illustrated Parts Breakdown (IPB) for the LA120 DECwriter III, a 180-cps hard-copy terminal. It serves as a comprehensive guide for identifying and ordering parts, as well as accessing support services.

The IPB's structure and conventions are detailed at the beginning, explaining:

• Organization: It follows the engineering drawing structure.
• Major Assembly Locator: An index providing descriptions and figure references for all illustrations.
• Indented Parts List: Parts are identified with asterisks indicating their subordination within assemblies, aiding in identifying next higher assemblies and alternative parts.
• Column Callouts: Descriptions for fields such as "Figure & Item," "Description" (including specifications and subordination), "DEC Part No.," "ECO Cut-In" (detailing revision levels), "Used On Code" (for option variations), "Ref Fig No." (cross-references), and "Symbol Usage" (for hardware designators and specific part notations).
• Revision History: A table tracking changes and ECO levels.

The main body of the document features numerous illustrations of various assemblies and their components, each accompanied by a corresponding parts list. These include:

• The overall unit assembly.
• Various harness assemblies (switches, power entry, logic power, power supply).
• Key mechanical assemblies (printer mechanism, ribbon chassis, idler gear, stepping motor, carriage, ribbon drive, servo motor).
• User interface components (keyboard bezel, keyboard/keycap assemblies).
• Covers and related parts.
• E.I.A. Cable Assembly.
• Power Entry Bracket and Switcher Assemblies.

Additionally, a "Self-Maintenance Purchasable Parts List" section provides ordering information for components, spares kits, tools, and supplies. It also details Digital Support Services, including the Customer Returns Center, and lists international offices for support. Further accessories, transient voltage surge suppressors, and constant voltage conditioners are also documented.