Tu60 Decassette Tape Transport

This document is a comprehensive maintenance and technical manual for the TU60 DECassette Tape Transport, a solid-state, magnetic data storage device produced by the Digital Equipment Corporation.

The manual provides technical information organized into five main chapters:

• General Information: Describes the device's functionality, operational specifications, and strict requirements regarding the use of certified DEC tape cassettes to avoid damage.
• Installation: Provides procedures for unpacking, inspection, electrical setup, and initial checkout.
• I/O Interface Signals: Details the functional operation of the interface signals used to communicate between the computer system and the transport.
• Theory of Operation: Explains the underlying logic and hardware operation, including tape formatting, motion control, read/write operations, and the analysis of analog circuits, servo systems, and the H751 power supply.
• Maintenance: Outlines preventive maintenance schedules, detailed adjustment procedures (such as servo loops, head skew, and timing), troubleshooting guides, and information regarding diagnostic routines.

The document also includes an appendix with detailed reference drawings, including block diagrams and schematic diagrams for the interface, formatter, and motor/servo logic.