Motor Control

This document provides a technical schematic and parts list for a Motor Control circuit manufactured by Digital Equipment Corporation (dated 1971).

The schematic details the electrical connections for a motor power supply, including:

• Circuitry: A complex arrangement of transistors (including types 2N4923, 2N3791, and DEC3715), Zener diodes (1N758A), various resistors, and capacitors.
• Voltage Inputs: The board handles inputs including +38V, -15V, +5V, and multiple signal inputs (OSC 0, OSC 1).
• Parts List: A comprehensive table identifies the required components, including mechanical hardware (nylon screws/spacers), transistors, diodes, resistors, and capacitors, along with their respective Digital Equipment Corporation (DEC) part numbers.
• Reference Information: The document includes a "Transistor & Diode Conversion Chart" to assist with maintenance and component identification.