M565

This document is a proprietary electronic circuit schematic titled "MEMORY E'S RECEIVER 1.5CE," copyrighted by Digital Equipment Corporation in 1970 and drawn by Hanly Moore on December 9, 1970. It is intended for test and maintenance purposes.

The schematic illustrates a complex electronic circuit utilizing numerous transistors (primarily DEC4274 and DEC4258), diodes (FD777, D664, D662), resistors, and capacitors. It operates on multiple power supply rails (+5V, -15V, +0.8V, -2.2V, -3V) and includes an "ENABLE (L)" control line.

The circuit design features numerous repetitive stages, each typically comprising two transistors with associated diodes and resistors, likely serving as input/output or driver sections. A dedicated section with transistor Q17 handles specific voltage regulation or control.

The document provides default component specifications (e.g., capacitors 0.047uF, 16V; diodes D664; resistors 1/4W, 5%; transistors DEC4274) and a comprehensive parts list detailing electronic and mechanical components for a printed circuit board assembly. Additionally, a transistor and diode conversion chart for DEC and EIA part numbers, along with a revision history, is included.