VAXstation 4000 Model 60 and VLC Condensed Service Information

This document, "VAXstation 4000 Model 60 and VLC Condensed Service Information" (EK-V466H-PS. A01, August 1992), is a condensed service manual intended for Digital Services personnel and customers with self-maintenance agreements. It provides essential information for maintaining and troubleshooting VAXstation 4000 Model 60 and VLC systems, superseding previous individual service guides.

The manual is structured into four main chapters and four appendices, covering:

• System Configuration: Details the hardware components, internal cabling, power supply specifications, control panel features, and I/O connectors for both VAXstation 4000 Model 60 and VLC models, highlighting their differences.
• Diagnostic Testing: Explains comprehensive diagnostic procedures, including power-up tests, console commands to display system configuration (SHOW DEVICE, SHOW CONFIG) and error messages (SHOW ERROR), and instructions for setting up various diagnostic environments. It describes how to run self-tests for different hardware components (e.g., memory, graphics, serial, network, SCSI, floating-point units, and TURBOchannel Adapter on Model 60) and outlines available utilities.
• Using the Console: Provides guidance on interacting with the system's console, detailing commands for system parameters, memory manipulation, and processor control. It also covers the use of alternate consoles via the printer port or network for remote access and troubleshooting.
• FRU Removal and Replacement Hints: Offers practical, step-by-step instructions for safely removing and replacing Field-Replaceable Units (FRUs) for both VAXstation 4000 Model 60 and VLC systems, along with necessary precautions.

The appendices serve as critical reference sections:

• Interpreting Error Codes (A): A comprehensive guide to understanding immediate and extended error messages generated by tests and utilities, including specific codes, their meanings, and the associated FRUs.
• Reading Diagnostic LED Codes (B): Describes how to interpret the diagnostic LED patterns, which are vital for troubleshooting when the console is inaccessible.
• Troubleshooting (C): A problem-symptom-solution guide that outlines common issues, their possible causes, and corrective actions for various system components.
• FRU Part Numbers (D): Lists the specific part numbers for all FRUs, miscellaneous hardware, cables, and terminators for both VAXstation 4000 Model 60/VLC and associated expansion boxes.

Overall, this document is a practical resource for technical personnel to diagnose, repair, and maintain VAXstation 4000 Model 60 and VLC systems.