RA80 Maintenance Guide

Company:Digital Equipment Corporation
Part:AA-M186B-TC
Date:1982-02
Keywords:

Table of Contents

  • 1 Introduction
    • 1.1 Scope of Book
    • 1.2 Related Documentation
  • 2 Removal and Replacement
    • 2.1 Introduction
    • 2.2 Location of Major Replaceable Units
  • 3 Adjustments
    • 3.1 Introduction
    • 3.2 Belt Tension Adjustment
    • 3.3 Servo Adjustments
  • 4 Drive-Resident Diagnostics
    • 4.1 Introduction
    • 4.2 Diagnostic Controls and Indicators
      • 4.2.1 Rotary Switches
      • 4.2.2 ENTER/RESET Switch
        • 4.2.2.1 The ENTER Position
        • 4.2.2.2 The RESET Position
      • 4.2.3 LED Display
    • 4.3 Test-Select Codes
    • 4.4 Prompt and Steady State Codes
    • 4.5 RA80 Utility and Diagnostic Procedures
  • 5 Fault Isolation
    • 5.1 Introduction
    • 5.2 HDA Formatting Procedure
    • 5.3 Subsystem Error Message Information
    • 5.4 LED Error Codes Troubleshooting Charts
    • 5.5 Power Supply Fault Isolation
    • 5.6 Troubleshooting Tips
      • 5.6.1 Check Firmware Revision and ROM Set Numbers
      • 5.6.2 Testing the Write-Protect Function
      • 5.6.3 Spindle Motor Thermal Timeouts
  • Appendix A Conversion Charts

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