Power Supply 739E

This document is a technical schematic for a Power Supply unit (Model 739E), manufactured by the Digital Equipment Corporation.

The schematic details the electrical configuration of the power supply, including:

• Transformer Tap Settings: A table providing instructions for wiring jumpers based on the input voltage (ranging from 112.5V to 235V).
• Circuitry Layout: Illustrations of the power supply circuits, including the "Inhibit Power Supply Control G800" and the "Read/Write Power Supply G800."
• Component Specifications: Notes indicating the usage of 2N3716 transistors, 3212 diodes, and specified thermistors for positive temperature coefficient compensation.
• Outputs: Information regarding voltage outputs, including 50-70V (0-5 Amps) and 65-85V (0-2 Amps), along with designated test points (T.P.) and an "O.K. Signal" indicator.
• General Notes: Standard specifications for capacitors and a reference to the Low Voltage Detector (W505).