Technical data

About This Guide
This guide is a support and reference document for Digital Services personnel
who perform maintenance work on the VAXstation 4000 Model 60 and
VLC systems. In addition, it is for customers who have a self-maintenance
agreement with Digital Equipment Corporation.
This is a condensed version of the VAXstation 4000 Model 60 and VLC service
guides. If you require a more detailed description of the system configuration,
firmware, and diagnostic tests, refer to the VAXstation 4000 Model 60 Service
Information and VAXstation 4000 VLC Service Information guides.
Manual Organization
This guide contains the following chapters and appendixes:
• Chapter 1, ‘‘System Configuration,’’ provides configuration information for
the Model 60 and VLC system boxes.
• Chapter 2, ‘‘Diagnostic Testing,’’ provides information about diagnostic
testing and test commands. It includes procedures for setting up diagnostic
environments, running self-tests, and invoking utilities.
• Chapter 3, ‘‘Using the Console,’’ describes system console commands and
alternate consoles.
• Chapter 4, ‘‘FRU Removal and Replacement Hints,’’ provides pointers
about how to remove and replace system FRUs.
• Appendix A, ‘‘Interpreting Error Codes,’’ describes immediate and extended
error messages and contains tables that list FRU codes and self-test error
codes and messages. In addition, this appendix contains descriptions and
tables for system tests that apply only to the Model 60.
• Appendix B, ‘‘Reading the Diagnostic LED Codes,’’ describes how to
interpret the diagnostic LED codes.
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