Bus Transceiver W122

This document is a technical schematic for a Digital Equipment Corporation (DEC) Bus Transceiver, revision D, dated 1969. The schematic details the electronic circuit layout, including a series of DEC3009B transistors, various diodes (D662, IN3606, IN645), capacitors, and resistors. It provides a technical breakdown for test and maintenance purposes, noting specific component values such as the 2.2µH chokes and the 1/4W, 5% tolerance resistors. A "Transistor & Diode Conversion Chart" is included to assist in identifying component replacements.