DECstation/DECsystem 5000 Model 200 Series

This maintenance guide provides detailed information on the DECstation 5000 Model 240 and 260 hardware. It covers system components, hardware configurations, and peripheral support. The document includes:

• Hardware Service Operations: Instructions for removing/installing field-replaceable units (FRUs) such as the system unit cover, power supplies, CPU modules, memory (SIMMs/NVRAM), and TURBOchannel option modules.
• Troubleshooting: Comprehensive guides for diagnosing system failures, including power-up self-tests, LED error codes, configuration displays, and the use of the console interface.
• Console Commands: A detailed reference for console commands used to manage the system, run tests, and examine hardware state.
• Specifications: Detailed equipment specifications for the system units, storage drives (SCSI, tape, diskette), and input devices.
• Appendices: Extensive reference material covering CPU/system registers, connector pin assignments, and official part numbers for FRUs and documentation.