I.O. Connector W850

This document is a technical schematic for the "I.O. Connector W850," produced by the Digital Equipment Corporation in 1966. The schematic details the wiring, electrical components, and signal paths for the W850 interface board. It displays three main connector sections (J2A, J1A, and J1B), illustrating a network of diodes (specifically D662 and D664) and capacitors configured to manage signals between various pins. The document also includes a transistor and diode conversion chart for maintenance and testing purposes, noting that resistors are 270 ohms and capacitors are .01 MFD.