VT220

This document is an installation guide for the Digital Equipment Corporation VT220 video terminal. It outlines the steps required to unpack, assemble, and set up the terminal for operation.

The guide begins by listing site planning specifications, including the terminal's weight, keyboard weight, electrical requirements (90-128 VAC or 180-268 VAC at 47-63 Hz), and operating conditions (10-90% relative humidity, 10-40°C temperature).

Key installation steps covered include:

1. Unpacking and Checking Contents: Instructions to verify all components like the video terminal, keyboard, cables, manuals, and a fuse/fuse carrier are present. It also advises on actions for missing or damaged items.
2. Identifying Connectors: A diagram illustrates the various ports on the rear panel of the terminal, such as composite video output, EIA host port, 20mA host port, printer port, power connector, keyboard cable connector, power switch, voltage selection switch, and fuse.
3. Physical Assembly: Steps for installing the keyboard legend strip and keyboard standoffs.
4. Connecting the Keyboard: Detailed instructions on how to connect the keyboard cable to both the keyboard and the video terminal, including cable routing options.
5. Electrical Setup:
   • Matching the power cord to the wall outlet voltage (115V or 230V).
   • Crucially, setting the voltage selection switch on the terminal to match the power cord voltage. A caution warns that incorrect settings can damage the terminal, and for 230V input, the fuse and fuse carrier must be replaced with provided 230V parts.
   • Ensuring the power switch is in the "O" (off) position before plugging in the power cord.
   • Plugging the power cord into the terminal and then the wall outlet.
6. Starting Up the Terminal: Setting the power switch to "1" (on), checking for the "Power OK" indicator, listening for a keyboard bell tone, and waiting for the "VT220 OK" display.
7. Adjusting Display: Instructions for setting brightness and contrast controls.
8. Adjusting Viewing Angle: How to use the tilt leg release button to set the monitor's viewing angle.
9. Optional Cable Connections: Guidance on connecting optional EIA, 20mA, or printer cables, emphasizing that the power switch should be in the "O" (off) position before connecting these.

The document concludes with a "Congratulations" message and a troubleshooting guide for common issues like the "Power OK" indicator status, keyboard bell tone, or no screen display, directing users to check connections, adjust display settings, or contact Digital Service Information for further assistance.