G624

This document is a schematic diagram for a "RESISTOR BOARD G624" (part number G624-0-1, Revision D) by Digital Equipment Corporation, copyrighted and dated 1967 (drawn May 24, 1967).

The schematic is provided for test and maintenance purposes and contains proprietary circuit information. It details several resistor-capacitor (RC) networks connected between various input/output points (labeled N-P, M-R, L-S, K-T, F-U, H-E).

Key component specifications include:

• General: Unless otherwise indicated, capacitors are 680 MMFD, and resistors are 10W, 1%, low inductance.
• Specific Resistors: R2, R3, R4, R5 are 56 ohms. R1 is 20 ohms. R6 is 470 ohms, 1/2W, 10%.
• Specific Capacitors: C3 is 1,000 MMFD. C2 and C9 are 20 MFD, 50V. C1 and C8 are .01 MFD.

The diagram also shows a parallel combination of C9 (20 MFD, 50V) and C8 (.01 MFD) connected to a ground point. It includes a revision history and indicates a printed circuit revision C.