VAX 4000 BA42B Enclosure Maintenance

This document, "VAX 4000 BA42B Enclosure Maintenance," provides comprehensive reference, installation, and maintenance information for the Digital VAX 4000 Model 100, 100A, and 105A systems' BA42B desktop enclosure.

Intended Audience: Digital Services personnel and self-maintaining customers with experience in hardware component replacement.

Key Contents:

• Enclosure Description: An overview of the BA42B Enclosure, detailing its mass storage device areas, controls, indicators, ports (including SCSI, DSSI, and various communication ports), power and signal distribution, air circulation, and configuration guidelines for memory, communication options, and mass storage devices.
• Installation Procedures: Instructions for preparing the site (including enclosure dimensions, environmental conditions, and electrical requirements), unpacking the system, and step-by-step guidance for installing the BA42B system. This includes connecting console terminals, Ethernet terminators/loopback connectors, SCSI and DSSI terminators, and the power cord, with specific procedures outlined for different VAX 4000 models.
• Removing and Replacing Field Replaceable Units (FRUs): Detailed procedures for servicing and replacing major internal components such as the enclosure cover, memory modules, drive-mounting shelves, various disk and tape drives (e.g., RX26, TZ30, TZK10/TZK11, TLZ06/TLZ07, RF-series, RRD42/RRD43 CD-ROM drives), SCSI and DSSI cables, the DSSI daughter board, synchronous and asynchronous communication options, the CPU module, and the power supply.
• Appendices: Includes pin specifications for system ports, a list of related documentation, and a recommended spare parts list.