Apple Hard Disk 20 Technical Procedures

The Hard Disk 20 Technical Procedures are the Hard Disk 20 section of Apple's Apple Service Technical Procedures, Volume Six (Macintosh), 37 pages with sections revised October 1985 to November 1986. They cover the external Apple Hard Disk 20; see also Apple Hard Disk 20 Maintenance. Apple's Service Source volume for the drive is described at Apple Hard Disk 20 Service Source.

Contents

• Section 1, Basics: introduction, setting up, initialising
• Section 2, Diagnostics: equipment needed and running the Hard Disk Drive Diagnostic
• Section 3, Troubleshooting: things to remember, the Hard Disk 20 troubleshooting flowchart and notes; appendix on startup problems and daisy-chaining problems
• Section 4, Take-Apart: tools, top cover, controller board, bottom shield, fan, power supply, hard disk assembly
• Section 5, Illustrated Parts List, with Apple part numbers (rev. Feb and Mar 86)

What this document does not contain

Module-level service only: no schematic and no power supply component values.

Pages that cite this document

• Apple Hard Disk 20 Maintenance: cites Section 1, pp. 1.2-1.3, Section 2, pp. 2.2-2.3, Section 3
• Apple Hard Disk 20 Service Source
• Hard Drive Maintenance and Repair: cites Section 1, pp. 1.2–1.3, Section 3

Download: Apple Hard Disk 20 Technical Procedures.pdf