RZ55 Disk Drive Subsystem

This document is a service manual for the RZ55 Disk Drive Subsystem, intended for Digital Field Service personnel and self-maintenance customers. It provides comprehensive information and procedures for servicing the 332 Mbyte, 5.25-inch SCSI hard disk drive in various host systems, specifically focusing on the DECstation 3100 and VAXstation 3100 systems.

The manual details:

• The RZ55 disk drive's features and specifications, including its two Field Replaceable Units (FRUs): the RZ55 option and the drive module.
• Step-by-step procedures for the removal and replacement of the drive bezel and drive module.
• Extensive troubleshooting guidelines, including checklists, flowcharts, and the use and interpretation of system diagnostics such as Power-On Self-Tests (POST), self-tests, console extended self-tests, and SCSI extended self-tests for both DECstation and VAXstation environments.
• Instructions for interpreting status LED codes and installing terminators and loopback connectors.
• Detailed procedures for removing and replacing the RZ55 disk drive within the system expansion box of both DECstation 3100 and VAXstation 3100 systems.
• A list of recommended spare parts for the RZ55 disk drive.