VSV21 Version 2.0 Pocket Service Guide

This document is the "VSV21 Version 2.0 Pocket Service Guide" (EK-VSV21-PSG-003), published by Digital Equipment Company Limited in March 1987 (Third Edition).

The guide provides comprehensive information for the installation, configuration, and troubleshooting of the VSV21, a single-module quad-size high-functionality graphics control module designed for the Q22 Bus. It is compatible with various PDP11 and MicroVAX II processors and interfaces with color monitors, LK201 keyboards, pointing devices, and serial interfaces. The VSV21 can also emulate a basic terminal and serve as the host console.

Key sections of the guide include:

• Introduction: Describes the VSV21's functionality and its components within typical option kits.
• Configurations: Details power and bus requirements, address and vector ranking, monitor settings, switch settings for graphic resolution, and default serial port configurations.
• On-Board Self-Test: Explains how to run the built-in power-up diagnostic, interpret LED indications, and troubleshoot based on test results.
• Diagnostic Programs: Provides procedures for using host-resident diagnostic software (XXDP+, DECX-11, and MDM for MicroVAX II systems) to perform various tests, including basic functionality, display tests, keyboard, pointing device, peripheral confidence tests, and NVRAM read/write tests.
• Installation: Outlines the steps for installing the VSV21 module, attaching I/O panels, connecting cables, and integrating peripherals.
• Troubleshooting: Features detailed flowcharts that guide users through diagnosing problems with standard VSV21 systems and VSV21 PC systems, offering probable causes and remedies.
• Appendices: Contain supplementary information such as associated documentation, LK-201 keyboard details (including key codes), a list of recommended spare parts, and an explanation of the Non-Volatile RAM (NVRAM) and how its stored parameters affect the module's configuration.

The document emphasizes that procedures requiring system cover removal should only be performed by suitably trained personnel and notes that the material is provided for information only.