DEC 4000 Model 6x0/7x0 AXP Series TZ87 Subsystem Installation

This document is an installation guide for the DEC TZ87 subsystem, a streaming tape drive, in DEC 4000 Model 6x0 or 7x0 AXP series systems.

It provides:

• An overview of the TZ87 tape drive, including its technical specifications (e.g., 10/20 GB capacity, 1.25 MB/s transfer rate, 5 1/4-inch form factor, power requirements) and field-serviceable parts/options.
• Details on the tape drive's physical layout, illustrating the front and rear panels, buttons, lights, and SCSI ID jumper selection settings.
• Comprehensive tables explaining the meaning of various status lights on both the top and bottom front panels, indicating conditions like tape movement, cleaning status, write protection, tape format (TK50/70, TK85, TK86, TZ87), data compression, and density override.
• Step-by-step physical installation instructions for inserting the TZ87 into the system's compartment, including notes on removing necessary screws and cables, and the use of bus continuity cards.
• Procedures for inserting and removing tape cartridges.