VAX 6000-400 Options and Maintenance

This document, titled "VAX 6000-400 Options and Maintenance" (Order Number EK-640EB-MG-002), is a technical manual published by Digital Equipment Corporation, first printed in July 1989 and revised in June 1990.

Purpose and Audience: It is specifically intended for Digital customer service representatives responsible for servicing the VAX 6000-400 system. The manual provides comprehensive instructions and information for the installation, removal, and replacement of field-replaceable units (FRUs) within the system.

Content Overview: The manual is organized into 11 chapters and 6 appendices, covering various hardware components and maintenance procedures:

• System Introduction: Provides an overview of the VAX 6000-400 system's physical and functional descriptions, architecture, and lists field-replaceable units (FRUs).
• Diagnostics: Details self-tests, ROM-based diagnostic (RBD) programs, and VAX Diagnostic Supervisor (VAX/DS) programs for system diagnosis and troubleshooting.
• Module-Specific Information: Includes dedicated chapters for the KA64A Scalar Processor, FV64A Vector Processor, MS62A Memory, and DWMBA XMI-to-VAXBI Adapter. These sections cover physical descriptions, specifications, configuration rules, functional descriptions, self-test results (console display, LEDs, registers), ROM-based and VAX/DS diagnostics, machine checks, console commands, and handling/replacement procedures for each module.
• Card Cages: Describes the XMI Card Cage and VAXBI Card Cage, including their system use, specifications, subassemblies, and detailed removal and replacement procedures.
• Subsystems: Covers Control Subsystem Assemblies (e.g., TK tape drive, XTC power sequencer, control panel, TOY clock battery), Power Subassemblies (e.g., power regulators, power and logic unit, AC power controller, transformer, battery backup unit), and the Cabinet and Airflow Subsystem (e.g., doors, filters, airflow/temperature sensors, blower assembly). For each, it provides specifications, removal, and replacement instructions.
• Appendices: Offer supplementary resources such as a system troubleshooting chart, console error messages, a cable list, XMI backplane connector numbering, and parse trees for processor error interrupts. A glossary and index are also included for reference.

The document emphasizes critical procedures and safety precautions, particularly regarding static-sensitive components and high-voltage areas.