FCO DRB32-0005, Problem during FAST DMA WRITE's to user device

This Field Change Order (FCO) DRB32-0005 addresses and corrects a problem that occurs during FAST DMA WRITE operations to user devices. This FCO applies to all DRB32-W options found on VAXBI bus systems that connect to various far-end devices and incorporates ECO T1023YA-TWO002.

The solution involves replacing the existing T1023-YA module with a new T1023-YA module of Minimum Revision "C03" (part number EQ-01645-01).

The document provides detailed, step-by-step installation and test procedures tailored for different VAX system configurations, including 6000-XXX Systems, 82XX/83XX Configuration I and II Systems, and VAX 85X0/8700/88X0, 8974 & 8978 Systems. Common key steps across these procedures include:

1. System Shutdown: Safely powering down the system and related components.
2. ESD Precautions: Implementing strict Electrostatic Discharge (ESD) safety measures, such as using static straps and VELOSTAT cases, due to the sensitivity of VAX modules.
3. Module Replacement: Removing the old T1023-YA module, attaching a Non-Conforming Material Tag, installing the new T1023-YA (Min Rev "C03") module, and properly packaging the old module for return.
4. System Power-Up: Restoring power to the system.
5. Diagnostics: Booting the Diagnostic Supervisor (VAX/DS) and running EVDRI.EXE to verify the successful installation of the new module. It emphasizes ensuring the DRB32-M module (T1022) is functional before diagnosing the DRB32-W.
6. System Restart: Bringing the operating system back online.
7. Administrative Updates: Updating the Site Management Guide and reporting FCO activity using the LARS form.