G230

This document is an electrical schematic and bill of materials (BOM) for the "X AND Y CURRENT GENERATOR G230," developed by Digital Equipment Corporation in 1971. It is explicitly stated that the circuits are proprietary, furnished for test and maintenance purposes.

The document includes:

1. Electrical Schematic:

   • It depicts a complex electronic circuit utilizing various active and passive components, including transistors (e.g., DEC 4258, DEC 2219), diodes (e.g., D672, D664), resistors, capacitors, integrated circuits (e.g., DEC 74H00 logic gates), and a variable delay line (DL1).
   • A prominent section is labeled as "CURRENT REGULATOR."
   • The circuit operates with multiple power rails, notably +5V and -15V.
   • General component specifications are provided, such as default resistor wattage/tolerance, diode type, transistor type, and capacitor characteristics.
   • Notes indicate that certain pins (C1 and N2) are for backplane current loops and cannot be used on the module, and that components shown with dotted lines are not used in this specific module.

2. Bill of Materials (BOM):

   • A comprehensive list of parts is provided, detailing DEC part numbers, descriptions, and quantities.
   • This list includes a wide range of electronic components (resistors, capacitors, various diodes, transistors, ICs, a variable delay, a heat sink) and some mechanical parts (e.g., "HANDLE, FLIP CHIP - GREEN," "EYELET WGS 4-7," "ETCHED CIRCUIT BOARD").
   • It also lists various documentation items related to the module's history and layout.