RA80 Maintenance Guide

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

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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