FCO DEBNI-0001 (DAS), Problems using "Show" commands

This Field Change Order (FCO DEBNI-0001) details the retrofit procedure for T1034-YA DEBNI modules of revisions B5, B6, or B7 to address several issues encountered when using "Show" commands. These problems include potential inadvertent memory writes, machine checks, disordered error messages, backward-saved registers in error blocks, and inaccurate overflow counts.

The FCO mandates an upgrade to new part revisions C5, C6, or C7, incorporating ECO T1034-YA-MK002. The installation, estimated at one hour, requires using an Electrostatic Field Service Kit (VELOSTAT) to prevent electrostatic discharge damage. The process involves shutting down the system, carefully replacing the old DEBNI module with a new one (T1034-YA Module, Rev C*) from the EQ-01582-02 kit, and then verifying the upgrade through power-on self-tests and various diagnostics. Field spares stock must also be upgraded. The document was released on May 21, 1990.