Series Switch G285

This document provides the technical schematic and a component layout diagram for the Series Switch G285, a circuit board produced by the Digital Equipment Corporation in 1967.

The schematic details the electrical connections for the board, which utilizes a series of transistors (MPS 6531/DEC6534B), diodes (D664/D670), and resistors of various values to manage signal switching. Key specifications noted on the document include power requirements (+10V or +20V depending on the configuration, and -15V), capacitor values, and a conversion chart for transistor and diode parts. The second page provides a visual assembly guide, showing the physical placement of all electrical components on the board layout.