VAXstation 3520/3540 Maintenance Guide

This "VAXstation 3520/3540 and 3820/3840 Maintenance Guide" is a technical manual designed for Digital Customer Services personnel and customers with self-maintenance agreements. It provides essential information and procedures for maintaining, troubleshooting, and upgrading these VAXstation models.

The document covers the following key areas:

1. Hardware Overview: Describes the workstation's architecture, including its M-bus, Q-bus, and Graphics bus systems. It details the major components such as the monitor, system unit (CPU, I/O, memory, graphics, and adapter modules), control panel, backplane, internal and external mass storage devices (hard disk drives, tape drives, optical disc drives), power supplies, and fans. It also outlines external and internal connections and covers.

2. Testing and Troubleshooting: Provides a systematic approach to identifying faulty Field Replaceable Units (FRUs). This includes:

   • Instructions for running both power-up self-tests and more extensive system tests.
   • Guidance on using console mode commands (TEST, SHOW, BOOT, HALT, etc.) for diagnostics.
   • Detailed interpretation of self-test and system test error messages, including specific error codes and their probable failed FRUs for various subsystems (I/O, SCSI, System Support Chip (SSC), Serial Line Adapter (DZ), Network Interface (NI), CPU, Memory, Graphics, Tape Adapter, and Tape Drive Controller).
   • Troubleshooting steps for common issues like no display on the monitor or incomplete power-up self-tests.

3. Hardware Access and FRU Replacement: Offers safety information and step-by-step instructions for physically accessing and replacing components:

   • Procedures for turning off the system and using antistatic precautions.
   • Detailed guides for removing and replacing all internal and external covers (front, back, I/O, graphics, mass storage).
   • Instructions for removing and replacing specific internal FRUs like the battery pack, system modules (CPU, memory, I/O, Q-bus/tape adapters, graphics), control panel, mass storage drives, power supplies, AC filter, AC switch assembly, fans, and the backplane.
   • Brief instructions for replacing external FRUs like the monitor, keyboard, and mouse/tablet.

4. Installing Options: Explains how to install new hardware options and upgrades:

   • Guidelines for unpacking, inspecting, and testing existing configurations before installation.
   • Information on changing system configurations, including module order and using the CONFIG program to determine CSR addresses and interrupt vectors.
   • Specific installation procedures for memory, CPU, and graphics expansion modules, Q-bus and tape adapter modules, and various mass storage devices (RRD40 optical compact disc drive, TK70 tape drive, RZ55/RZ56 hard disk drives).

5. Appendices: Provide comprehensive reference material:

   • Equipment Specifications: Detailed physical, electrical, and environmental specifications for system units, monitors, keyboards, mice, tablets, and various drives.
   • Part Numbers: Lists system FRUs, hardware option kits, and documentation part numbers.
   • Console Commands: Comprehensive descriptions of all console commands, their syntax, and functions.
   • Cable and Connector Pin Assignments: Detailed pinout information for various cables and connectors.
   • Interpreting LED Displays: Explanations of LED indicators on different modules and devices to aid in troubleshooting.
   • SCSI and SSC Test Numbers and Utilities: In-depth information on SCSI and System Support Chip self-test numbers and utilities, including error codes and their meanings.

The guide emphasizes the importance of following proper safety and antistatic procedures throughout all maintenance and installation tasks.