Magazine and Cartridge Tape Subsystem

This service manual provides detailed information for servicing the TF/TZ 800-series magazine tape subsystems, covering models such as the TF857, TF867, TZ857, and TZ867. The document includes chapters on:

• Overview and Specifications: Describes hardware components and operational modes.
• Operating Procedures: Details the use of the Operator Control Panel (OCP), loading/unloading procedures, and magazine handling.
• Local Programs and Utilities: Explains how to access and use diagnostic utilities like DIRECT, HISTRY, PARAMS, and various drive exercisers (DRVEXR, DRVTST, LDRTST).
• Troubleshooting: Outlines fault identification, power problems, and cartridge motion recovery.
• FRU Removal and Replacement: Provides step-by-step procedures for replacing Field Replaceable Units (FRUs) such as the controller module, tape drive, and fan, including a warm swap procedure.
• Diagnostics: Describes POST procedures and functional microdiagnostics for both TF and TZ series, including host-level diagnostics.
• Firmware Update Procedures: Details how to perform firmware updates for both DSSI and SCSI subsystems.

Additional information is provided in appendices regarding head cleaning procedures, error logs, and EVMDA tape drive exerciser tests.