Professional 380

This document is a pocket-sized service guide for the Digital Equipment Corporation Professional 380 computer system. It includes instructions for field troubleshooting, identification of field replaceable units (FRUs), removal and replacement procedures, and necessary service tools. Key sections cover:

• Troubleshooting and Testing: Covers power-up self-tests and maintenance application diskette tests to isolate system failures.
• Removal and Replacement: Provides step-by-step instructions for replacing FRUs such as the top cover, diskette drives, hard disk drives, power supplies, and system modules.
• Video Monitor Alignment: Detailed procedures for aligning the VR201 monochrome monitor.
• DELNI Unit Testing: Procedures for testing and troubleshooting the Digital Ethernet local network interconnect unit.
• Related Documentation and Spares: Provides a Recommended Spares List (RSL) and references for additional technical documentation and print sets.