G933

This document is a schematic diagram for a G933 Reel Motor Amplifier.

Key details include:

• Purpose: Furnished for test and maintenance purposes, proprietary to Digital Equipment Corporation, copyright 1970.
• Components: The circuit utilizes various transistors (e.g., DEC4502, D45C8, DEC802), diodes (e.g., D672, D664, IN756A), resistors, capacitors, and DEC380 logic gates (labeled 'EI').
• Power Supplies: It operates with +16V, -16V, and +5V rails.
• Inputs/Outputs: Features inputs such as "UPPER MTR SW" and "REEL MTR ENABLE L," and generates a "620 REEL MOTOR PULSE" output. A "MOT" symbol indicates the motor connection.
• Specifications: General specifications state resistors are typically 1K, 1/4W, 5%; diodes are GE A15B; and transistors are DEC6531, unless otherwise indicated. A conversion chart for transistors and diodes is also included.
• Document ID: The drawing number is G933-0-1, revision K.