PC04-PC05

This document is a comprehensive collection of engineering drawings and specifications for the Digital Equipment Corporation (DEC) PC04 and PC05 paper tape reader/punch units.

Key sections cover:

• Unit Assembly: Detailed mechanical drawings and parts lists for the physical construction of both PC04 and PC05 models.
• Power and Control: Schematics for power supply, control logic, and bus bar configurations.
• Functional Subsystems: Dedicated drawings for the paper tape reader and punch mechanisms.
• Module Utilization and Circuit Schematics: Lists and detailed electrical diagrams for individual circuit modules, including photo transistor amplifiers, solenoid drivers, punch/reader control, power regulators, and Triac driver assemblies.

The engineering specification provides critical operational details, such as:

• Configurations: Eight different PC04 configurations with 50-cycle variations.
• Logic Levels: Defined for both Negative and Positive Logic Systems.
• Performance: Reader speeds of 300-310 characters/second (full speed) and 20-26 characters/second (single character); Punch speed of 50 characters/second.
• Environmental Ratings: Operating temperature, humidity, and tape type specifications.
• Power Requirements: 115V ±10% AC at 2.5-4 Amps, with regulated +5V, -15V, and -36V supplies.

Overall, the document serves as a complete technical reference for the manufacturing, maintenance, and understanding of the PC04/PC05 paper tape reader/punch systems.