The VT420 is an ANSI standard computer terminal introduced in 1990 by Digital Equipment Corporation (DEC). The 420 is the only model in the 400 series, replacing the VT320. There are no color or graphics-capable 400 series terminals; the VT340 remained in production for those requiring ReGIS and Sixel graphics and color support.

View and Download DEC VT420 service manual online. monochrome video terminal. VT420 touch terminals pdf manual download.

This chapter introduces you to the VT420 video display terminal. The VT420 is a general-purpose terminal that you use to communicate with a host computer system. The chapter provides an overview of the terminal and its basic operating features. The chapter also tells you where to look in this guide for more information about each feature.

This guide describes how to service the VT420 monochrome video terminal. The guide is for Digital’s service personnel. The guide has five chapters that cover the following topics: VT420 models and features Troubleshooting and testing Removing and replacing field replaceable units (FRUs) Adjusting the video monitor Using set-up

VT420 Video Terminal With PC Terminal Mode Update. Following are the added 8-bit and PC character sets available from the User-preferred Supplemental Set (UPSS) in the General Set-Up

The VT420 uses Digital's LK401, keyboard, which comes in many models for use in different countries. Most models are available in a standard or word processing (WPS) version. The only physical difference between all keyboards are the legends on the keys.

2019年8月17日 · The DEC VT420 terminal was introduced in 1990 and used an LK401 keyboard. Manx. Installing and Using the VT420 Video Terminal (North American Model), November, 1989; Installing and Using the VT420 Video Terminal (Worldwide Model), June, 1990; Installing and Using The VT420 Terminal With PC Terminal Mode Update, January, 1993

iv Contents 2 Character Encoding Overview ..... 13 Coding Standards..... 14

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This chapter provides step-by-step instructions. All other VT420 operating features are already set to a factory-default setting that works with most Digital systems. You may have to set some features to match your host system. For example, the VT420 must use the same communication baud rate as your host system.