Rack-Mountable VAX 4000 Storage Backplane Assy Conversion Guide

This document, the "Rack-Mountable VAX 4000 Storage Backplane Assembly Conversion Guide" (Order Number EK-RMSBA-CG), provides instructions for replacing the storage backplane assembly (P/N 70-28602-02) in Rack-Mountable VAX 4000 systems.

Key points:

• It details the process of replacing an existing Rev A01 or Rev B01 storage backplane with a new Rev B01 storage backplane.
• The guide highlights that the Rev A01 backplane has four power connectors, while the Rev B01 has three. Both revisions are compatible with VAX 4000 Models 300, 400, and 500, but only the Rev B01 can be used as a replacement in the Model 600. A minimum of three power connector assemblies are required for all models.
• The intended audience is Digital Services personnel and licensed self-maintenance customers, with a strong emphasis that only qualified individuals should perform the installation after ensuring a software backup.
• The document provides step-by-step procedures for both removing the old backplane (including disconnecting cables, power, ISE devices, and tape drives) and installing the new Rev B01 backplane. A specific step for extending the SCSI cable is included if converting from a Rev A01.
• It includes important CAUTION notes regarding static electricity, correct cable labeling, and proper installation of components like the continuity card to ensure correct backplane functionality.