DESVA Ethernet Module

This document is the "DESVA Field Maintenance Print Set" published by Digital Equipment Corporation in 1987, specifically for their DESVA-AA Ethernet Network Interface.

It serves as a comprehensive technical guide for field service and engineering personnel, containing:

• A Table of Contents outlining the various included sections, primarily focusing on the Ethernet Interface and Network Interface Option.
• Detailed Parts Lists, specifying components required for the Network Interface Option (including for VAXMA systems), Thin Wire Ethernet Kits, cable assemblies, and specific module options.
• Specific Rework Instructions, providing step-by-step procedures for modifying the circuit board, such as adding components (inductors, capacitors) and making wiring changes.
• Extensive Circuit Schematics that illustrate the detailed design and functionality of the Ethernet Network Interface. These schematics cover various aspects, including:
  • High-level logic and major components (like the LANCE and SIA chips).
  • Data paths (high and low word) for communication with a UVAX system.
  • The interface for a programmable Read-Only Memory (ROM).
  • The I/O connector and associated ready logic for proper operation.

The document is marked as confidential and proprietary, intended for authorized use in the manufacturing or servicing of Digital Equipment Corporation products.