VT05 Bus Board

This multi-page document from Digital Equipment Corporation (DEC), copyrighted 1971, provides detailed technical documentation for various components of a VT05 terminal system, emphasizing the proprietary nature of its circuits. The document is structured into several sections, each with its own schematics, assembly drawings, and parts lists:

1. VT05 Bus Board (Page 1): Presents the schematic and a parts list for the main bus board, outlining bus connections and listing components such as brackets, switches, sockets, connectors, and the etched circuit board itself.
2. VT05 Raster Display (Pages 2-5): Contains comprehensive schematics and parts lists for the VT05's raster display unit. This section details the power supply, video processing, horizontal and vertical scan circuits, and lists numerous resistors, capacitors, transistors, diodes, transformers, and the Cathode Ray Tube (CRT).
3. DEC Keyboard 2 (Pages 6-9): Focuses on the keyboard assembly, providing schematics for its oscillator circuits, key matrices, Read-Only Memory (ROM), and control logic. The accompanying parts lists include detailed breakdowns of the PC board, keycaps, springs, diodes, resistors, capacitors, and transistors.
4. Pot Assembly (Pages 10-11): Includes an assembly drawing with a wire table and a parts list for a potentiometer assembly, detailing the connections and listing potentiometers, brackets, connectors, wires, and fasteners.
5. Cursor Board Assembly (Keyboard) (Pages 12-13): Offers assembly drawings and a parts list for the cursor board, a component within the keyboard. It illustrates the etched circuit board layout and enumerates components like IC sockets, transistors, capacitors, resistors, dust covers, and various mechanical elements associated with the cursor's operation.

Each section includes specific DEC part numbers for the listed components.