VT330 Pocket

This document serves as a field service guide for the VT330 monochrome video terminal. It provides detailed instructions on testing and troubleshooting the terminal's Field Replaceable Units (FRUs), including running self-tests, interpreting error codes, and resolving general operational problems. The guide outlines procedures for the removal and replacement of various FRUs, such as the CPU module, ROM cartridge, power supply, video amp module, keyboard, and optional mouse/tablet.

A substantial section is dedicated to aligning the video monitor, covering adjustments for sub-brightness, sub-contrast, display size (rotation, horizontal width, centering, vertical height), character quality, linearity, focus, and viewer preferences using specific screen test patterns. It also explains how to use the terminal's set-up utility to configure operating features and manage dual sessions. Appendices provide additional resources, including related documentation, troubleshooting for the Session Support Utility, exploded view diagrams of FRUs, cable connection details, and physical/functional diagrams. Throughout the guide, warnings, cautions, and notes emphasize safety, especially regarding CRT handling and disposal, and list necessary tools and recommended spare parts.