TurboChannel Maint Guide

This document, the "TURBOchannel Maintenance Guide (EK-TRBOC-MG-005)," from Digital Equipment Corporation, is intended for trained Digital customer service representatives familiar with DECstation/DECsystem maintenance.

The guide's primary purpose is to help users identify and replace failed Field Replaceable Units (FRUs) for TURBOchannel option modules. It outlines general procedures for handling and installing option module hardware, including specific instructions for ESAR chips, VSIMMs, and z-Buffer modules.

The document is organized into several parts, each focusing on specific types of hardware:

• Graphics Modules (Part I): Provides detailed maintenance information for Monochrome, Color, Two-Dimensional Graphics Accelerator, Smart Frame-Buffer, and Three-Dimensional Graphics Modules. For each type, it covers hardware overview, troubleshooting procedures, and individual self-tests with their commands and error messages.
• Communications Controllers (Part II): Specifically addresses Ethernet Controllers, detailing their hardware, troubleshooting steps, and various self-tests (Collision, CRC, ESAR, Loopback, Interrupt, Multicast, RAM, Registers).
• SCSI Controllers (Part III): Covers SCSI Controller hardware, troubleshooting, and individual tests (Controller, RAM, Send Diagnostics, Target).
• Drives (Part IV): Discusses System Drives (hard disk, tape, optical compact disc drives), their hardware, troubleshooting, and procedures for removing and installing drive expansion boxes. It also references relevant SCSI tests.
• Monitors (Part V): Details supported monitors, how to combine them with TURBOchannel graphics modules, troubleshooting display issues (no display, incorrect colors), testing the display, and displaying adjustment patterns. It also provides features and control descriptions for individual monitor models.
• Recommended Spares List (Appendix A): Includes part numbers for TURBOchannel option modules, basic components (monitors, drives), cords, cables, connectors, loopback connectors, test media, and related software and hardware documentation.

In essence, the guide is a comprehensive technical manual for diagnosing problems and performing hardware replacements on Digital Equipment Corporation systems utilizing TURBOchannel technology, with a strong emphasis on self-tests and error message interpretation for various components.