DECsystem 5900/260 CPU Card Installation

This document, "DECsystem 5900/260 CPU Card Installation (Order Number: EK-D5960-IN. A01)," provides step-by-step instructions for upgrading a DECsystem 5900 to a DECsystem 5900/260 by replacing an R3000 CPU/daughter card with an R4400 CPU/daughter card.

Intended for Digital Services engineers or authorized self-maintenance customers, the manual outlines the entire upgrade process, including:

1. Overview and Preparation: Unpacking the upgrade shipment, backing up system software, orderly shutdown of the ULTRIX operating system, turning off system power, stabilizing the enclosure, and pulling out the CPU drawer.
2. CPU Card Replacement: Detailed procedures for opening the CPU drawer compartments, removing the existing R3000 CPU/daughter card, installing the new R4400 CPU/daughter card, installing EMI grounding material, and attaching a conversion label.
3. Completion and Testing: Pushing the drawer back in, retracting the stabilizer bar, turning on the system, closing enclosure doors, replacing the system medallion, and running acceptance tests (Power-Up Self-Test, System Configuration Check, Extended ROM Tests).
4. Software Configuration: Modifying ULTRIX and reinstalling system backup data.
5. Mandatory Card Return: A comprehensive procedure for packing and returning the used R3000 CPU/daughter card to Digital Equipment Corporation, including necessary forms and contacts to avoid penalty charges.

The document emphasizes critical safety precautions, such as turning off power, using a stabilizer bar, and static electricity protection.