System Firmware Update for RZ26L and RZ28 Drives

This document outlines the procedure to resolve an issue where previous revision FRUs in Microvax 3100 Model 30, 40, and 80 systems fail to detect RZ26L and RZ28 drives due to a short SCSI reset time. The solution involves replacing two firmware EPROMs on the CPU board. The document includes detailed safety precautions for handling electrostatic-sensitive components, step-by-step instructions for disassembling the system unit to access the CPU board, performing the EPROM replacement, reassembling the unit, verifying the firmware update using console commands, and reporting the completion of the FCO activity. It also lists the specific parts required for the update (EQ-01704-01) and provides diagrams for board layouts.