DECsystem 5900 Enclosure Maintenance Manual

This document is the DECsystem 5900 Enclosure Maintenance Manual (EK-D590A-EN.B01), published by Digital Equipment Corporation in July 1992 (revised June 1993). It is a technical guide primarily intended for Digital service representatives.

The manual provides comprehensive information and step-by-step procedures for the installation, maintenance, and Field Replaceable Unit (FRU) removal and replacement for the DECsystem 5900 and DECsystem 5900/260 computer systems.

Key areas covered include:

• System Overview: A detailed physical description of the DECsystem 5900 enclosure, its cooling scheme, power controller, CPU drawer, and various mass storage drawers. It describes their components, options, power requirements, cables, and buses.
• System Installation: Guidelines for site preparation (physical dimensions, static electricity, acoustics, heat dissipation, electrical requirements), unpacking and leveling the system, connecting console and network cables, and power-up procedures. It also covers basic troubleshooting and power-up self-tests.
• FRU Removal and Replacement (Enclosure & CPU Drawer): Detailed instructions for accessing the enclosure and CPU drawer, and for replacing components such as the power controller, CPU blower, CPU power supply, power distribution module, CPU/daughter card, memory options (MS02-CA, MS02-NV), TURBOchannel options, and the entire system module or CPU drawer.
• FRU Removal and Replacement (Mass Storage): Extensive procedures for accessing and servicing mass storage drawers (both versions 1 and 2), including removal and replacement of various storage devices (e.g., RZ57, RZ58, RRD42, RX26, tape drives like TKZ09, TLZ04, TLZ06, TZ30, TZ85, TZK10, and StorageServer 100), their brackets, power supplies, and fans. It also provides detailed instructions for SCSI ID configuration and troubleshooting for these devices.
• Appendices: A comprehensive list of Field-Replaceable Units (FRUs) and their corresponding part numbers for the DECsystem 5900 system.