DEC-00-PC0A-D PC04 Manual

This document is a maintenance manual for the Digital Equipment Corporation (DEC) PC04/PC05 High-Speed Paper-Tape Readers and Punches. It specifically pertains to "feed-hole strobed" models (those with ECO numbers PC04-00046 or PC05-00021), differentiating them from earlier versions.

The manual provides comprehensive information for service personnel, covering:

• General Information: Scope, detailed descriptions of the electromechanical reader (DEC-manufactured, 9-channel photoelectric, up to 300 characters/second) and punch (DEC-modified Roytron Model 500, capable of 5-, 7-, or 8-level tape), and full technical specifications. It notes that the PC04's control is in the CPU, while the PC05 has its own.
• Installation: Procedures for mounting, connections to various PDP computer systems (PDP-8E, 8I, 8L, 11, 12, 15), power requirements, and initial checkout.
• Operation: Instructions for using controls, fuses, and loading both blank and prepunched paper tape.
• Principles of Operation: Detailed functional descriptions of both the paper-tape reader and punch, explaining the tape feed, reading, control mechanisms, and the punching process.
• Maintenance: Extensive procedures for preventive and corrective maintenance. This includes mechanical and electrical checks, and detailed adjustment steps for the reader (e.g., feed wheel, tape depressor, lamp/lens, full-speed running rate, acceleration/stop delay, threshold, skew) and the punch (e.g., sprocket wheel, tape output quality, electrical parameters, basic timing, and magnet adjustments).
• Appendices: Resources such as diagnostic programs, suggested test tape programs, stall programs, and a summary set-up procedure.

Published by Digital Equipment Corporation between 1970 and 1973, this manual is essential for the upkeep and troubleshooting of these specific paper-tape peripherals.