TU55 DECtape 55

This document serves as the instruction manual for the TU55 DECtape Transport. It covers the following main topics:

• Introduction and Description: Provides an overview of the unit, its physical characteristics, interface details, and performance specs.
• Theory of Operation: Explains the block diagram, command lines, tape motion control, and detailed module descriptions (R303, W513, G850).
• Operation: Offers guidance on local/remote operation, controls, indicators, and loading tape.
• Maintenance: Details the equipment required, preventive maintenance schedules, troubleshooting steps, and recommended spare parts.
• Engineering Drawings: Contains schematics and logic diagrams for the TU55 system modules.