de2 电容问题 DE2 Power Failure Diagnostic and Correction DE2 Capacitor Failure: This document describes how to diagnose the power failure and determine if TC3 is inoperative. It also explains how to make the board functional by removing TC3. TC3 Capacitor: The Altera DE2 Development and Education board was converted to an all lead free product in mid 2006. In the course of this conversion the input power circuitry transitioned from Tantalum to Aluminum Solid Electrolytic capacitors. Tantalum Cap Aluminum Solid Electrolytic Cap Unfortunately there is a relatively rare scenario that can cause one of the input capacitors to receive voltage exceeding its specification. This causes it to fail and prevent power from getting to the ……