DECstation 5000/DECsystem 5000 Model 200

This maintenance guide provides technical information for service representatives regarding the DECstation 5000 and DECsystem 5000 Model 200 hardware. It includes detailed sections on system configurations, routine service operations (such as removing covers and installing loopback connectors), and extensive troubleshooting tools. The document covers identifying failed Field Replaceable Units (FRUs), interpreting error messages from diagnostic LEDs and monitor logs, and specific procedures for testing and replacing the system module, memory modules, keyboard, mouse, and power supply. Appendices provide equipment specifications, a recommended spares list, and detailed console commands for both standard and Version PDE3 ROM configurations.