DECsystem 5100

This document is a maintenance guide for the DECsystem 5100, a RISC-based multiuser desktop system running the ULTRIX operating system. It provides comprehensive procedures for system maintenance, including:

• General Maintenance: Instructions for visual checks, system shutdown, performing power-up self-tests, monitoring status LEDs, and using console mode to boot the operating system.
• Diagnostics: Detailed information on running and interpreting extended self-test diagnostics to isolate hardware failures, including specific test descriptions for components like the CPU, FPU, cache, memory, and SCSI controllers.
• FRU Removal and Replacement: Step-by-step procedures for removing and replacing field replaceable units (FRUs), such as the system module, power supply, disk and tape drives, and memory modules.
• Console Commands: A reference for console mode commands used for system configuration, testing, and operation.
• Specifications: Technical specifications for the system and its various hardware components.

This manual is intended for Digital Field Service personnel or customers with self-maintenance agreements who have experience in hardware repair.