Magazine and Cartridge Tape Subsystem

This document is a technical service manual for Digital Equipment Corporation's TZ877 Magazine and Cartridge Tape Subsystem. It is intended for use by Digital Services engineers and covers the following key areas:

• System Overview: Describes the hardware components, including the loader transfer assembly and the TZ87 tape drive, as well as operating modes (Automatic, Manual, Service, and OCP Disabled).
• Operating Procedures: Details how to operate the Operator Control Panel (OCP), handle cartridges, select tape density, and use the magazine for automated tape operations.
• Troubleshooting: Provides diagnostic procedures for identifying and clearing error conditions, such as magazine faults, loader faults, and cartridge motion problems.
• Replacement Procedures: Contains step-by-step instructions for removing and replacing Field Replaceable Units (FRUs), including the controller module, loader transfer assembly, fan, power supply, and handle motor assembly.
• Diagnostics: Outlines the use of local diagnostic programs, Power-On Self-Tests (POST), and SCSI-level tests for verifying system integrity.
• Maintenance: Covers the head cleaning procedure using the CleaningTape III cartridge.

The manual includes numerous illustrations, diagrams of hardware components, and tables listing specifications and spare parts.