W078

This document is a proprietary schematic for the Digital Equipment Corporation (DEC) Teletype Connector, model WO78 (WO78-0-1), copyrighted 1969. It is furnished for test and maintenance purposes.

The schematic details the internal circuitry, including various resistors, capacitors, diodes (e.g., D671 / IN3653), and a transistor (Q1, DEC 6534D / MPS6534D). It illustrates connections from an 'AMP CONNECTOR' (pins 1-8) to various outputs (A, B, C, D, E, H, K, M, U, V) and 'RELAY +' / 'RELAY -' lines.

A "Typical Pin Assignments" table specifies voltage levels (+10V, +5V, -15V, GND, -30V optional) and logic functions (Logic Input, Logic Output, Reader Enable) for different configurations (8, 8I, 8L, DC08).

General component specifications are also provided:

• Capacitors: 0.1mF, 100V, 20% (unless otherwise indicated)
• Diodes: D671 (unless otherwise indicated)
• Resistors: 1/4W, 5% (unless otherwise indicated)
• Connector: DEC# 1209456