DEC 3000 Model 400 AXP System Service Information

This document is a service manual for the DEC 3000 Model 400/400S AXP system. It is intended for Digital Services personnel and customers with self-maintenance agreements.

The manual covers:

• System Overview: Components, features, and block diagrams of the workstation and server models, highlighting the Alpha AXP architecture and its 64-bit computing environment.
• Configuration: Details on Serial ROM jumpers, console security (including setting and restoring passwords), ROM updates, and the configuration of storage devices (SCSI drives, CDROMs, tape drives) and memory (SIMMs, Memory Mother Boards).
• Using the Console: Comprehensive list and description of console commands such as BOOT, CONTINUE, DEPOSIT, EXAMINE, HALT, HELP, INITIALIZE, LOGIN, REPEAT, SET, SHOW, START, and TEST, along with their parameters and qualifiers. It also explains how to use alternate consoles via the printer port or network.
• Diagnostic Testing: Information on power-on diagnostics, FRU (Field Replaceable Unit) codes, various diagnostic tests (ASIC, NVR, Memory, SCSI, NI, SCC, ISDN, TURBOchannel), how to run single/multiple tests continuously, and how to enter/exit console and service modes.
• Utilities: Descriptions of SCSI utilities including Show Device, Hard Disk Eraser, Floppy Formatter, and Disk Verifier.
• Troubleshooting: Tables and guidance for diagnosing issues using LED codes and addressing common problems related to the system, monitor, mouse, keyboard, drives, network, audio, console security, and firmware upgrades.
• Removal and Replacement: Step-by-step procedures for removing and replacing various FRUs like the floor stand, workstation cover, fixed and removable media, drive shelf, TURBOchannel options, SIMMs, I/O board, system board, and power supply, emphasizing antistatic precautions.
• Appendices: Includes details on firmware upgrades using CDROM, creating a bootable disk, and extensive lists of LED codes, error/status messages for various diagnostics, and a recommended spares list with part numbers for common components.