Low Voltage Detector W507

This document contains a detailed electronic circuit schematic for the Digital Equipment Corporation (DEC) Low Voltage Detector W507. The schematic includes operational amplifier configurations (E1 through E9), transistor components (2N4258), various diodes (including D664 and 1N753A), and a resistor/capacitor network. It is explicitly designated for test and maintenance purposes and features a transistor and diode conversion chart to aid in component identification and replacement.