VAX 6000 Model 500 Service Manual

This document, the (VAXmodXXX) Service Manual (Order Number EK–650EA–MG–001), is intended for Digital customer service engineers. It provides comprehensive processor-specific and troubleshooting information for the (VAXmodXXX) system, designed to be used in conjunction with the VAX 6000 Platform Service Manual.

The manual covers:

• System Overview: Introduces the system architecture and provides troubleshooting flowcharts.
• Diagnostics: Details ROM-based diagnostics (RBDs), including self-tests, power-up tests, and operator-invoked diagnostics for the CPU, memory, cache, multiprocessor interactions, and the DWMBB I/O adapter. It explains how to interpret test results from console displays, module LEDs, and registers (XBER, XGPR). The VAX Diagnostic Supervisor (VAX/DS) programs are also described.
• Hardware Modules: Dedicated chapters provide physical descriptions, specifications, configuration rules, functional descriptions, handling procedures, and replacement instructions for the (xmp) Scalar Processor, FV64A Vector Processor, MS65A Memory, and DWMBB I/O Adapter. Each module's relevant registers are also detailed.
• Troubleshooting & Reference: Includes information on machine checks, console commands, various error messages (console, boot status/errors), and LED patterns. Appendices provide parse trees for different error types and a procedure for restoring corrupted EEPROMs.