RS64 AC/DC Low Sensor

This document is an Engineering Change Order (ECO) log for the G8002 module, which functions as an RS64 AC/DC Low Sensor for PDP-11 family computers. It details four specific modifications:

• G8002-C0001: A relayout to etch revision 'C'.
• G8002-00002: Added a DC LOW sensing circuit and renamed the module to 'AC/DC LOW'.
• G8002-00003: Retrofitted circuits to accommodate H737 power-up characteristics to fix Power Fail diagnostics.
• G8002-D0004: A comprehensive update to address power-up characteristics for all H737 units. It specifies replacement procedures, exchange pricing for modules returned to the depot, and installation instructions.