Transistors that have given up the Magic Blue Smoke
Nov
25
These pictures come from a Dynapower USA DP-40205 400W power supply. It appears the standby regulation failed and took out the FET pictured above and also the capacitor and resistor near the top of the fan. The exploded piece of the FET was rattling around the power supply when it was opened and the part …
Nov
23
The capacitors in the first picture are failing as can be seen by their bulging. They are supposed to hold the electric charge for the inverter circuit using the 4511GM FET ICs shown above. Once the capacitor cannot hold its designed charge, the BIT3193 PWM controller in the middle of the bottom picture tells the …
Oct
29
Customer plugged wrong transformer into board which caused the FET to fail, and then L2 to heat up and fall off the board. Credit: http://www.kevtris.org/