applicationDEC 433MP

This Service Guide provides comprehensive information for service technicians to diagnose and repair the applicationDEC 433MP system. It begins with a system overview, detailing hardware components like processors, memory, storage devices, media devices, and typical system configurations, along with a Field Replaceable Unit (FRU) parts list. The document then delves into specific system components, including the backplane, base and bridge modules, memory modules (SIMMs), CPU/SIO, CPU/SCSI modules, various adapters (ISA SCSI, VGA, Terminal Multiplexer), and storage devices (diskette, CD-ROM, hard disk, tape drive), explaining their features and configurations.

Core to the guide are the diagnostic and troubleshooting procedures. It outlines steps for system troubleshooting, covering power, terminal/monitor, and boot problems. Dedicated sections detail the Boot Sequence, the Power-On Self-Test (POST) including beep codes and error messages, and the ROM Resident Diagnostics (RRD) with instructions for enabling, executing, interpreting errors, and using RRD commands. The System Exerciser, a diagnostic tool for testing system units, is also described, including how to load, run, and interpret its error messages and commands. Finally, the guide provides detailed procedures for the removal and replacement of all major FRUs, from the system box and bezels to individual modules like CPUs, memory, and various drives. An appendix lists and describes numerous RRD numbered tests.