R401

This document is a proprietary schematic diagram for a "Clock R401" circuit, copyrighted in 1984 by Digital Equipment Corporation. It is intended solely for test and maintenance purposes.

The schematic details the electronic components and their interconnections, including:

• Various transistors (e.g., DEC3009, DEC2894-28, DEC3639-0, DEC2219).
• Numerous diodes (e.g., D-662, D-664).
• Resistors and capacitors with specified values.

General component specifications are provided, indicating that resistors are 1/4W, 5%, and capacitors are MMFD, unless otherwise noted. A Transistor & Diode Conversion Chart cross-references DEC part numbers with their EIA equivalents (e.g., DEC3639-0 to 2N3639, D662 to 1N645).

The document is identified as number R401-0-1 with Printed Circuit Revision H.