Field Change Order

This Field Change Order (FCO) addresses potential reliability issues in the VT420 terminal, specifically the overheating of capacitor C621 and high contact resistance in the yoke cable connector. The document provides instructions for identifying affected units (manufactured on or before April 1992), ordering appropriate EQ kits, and performing the necessary modifications, which include replacing the capacitor with a red Wima version and potentially replacing the yoke cable assembly or PCB header connector. It includes safety warnings regarding electrostatic discharge, detailed step-by-step disassembly and reassembly instructions, and LARS reporting requirements.