Magic Blue Smoke » Resistors

Dynapower DP-40205 with exploded FET

MagicBlueSmoke — Thu, 26 Nov 2009 00:02:07 +0000

DP-40205 top

Exploded FET

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 that remained on the board was loose. It’s suspected the capacitor damage was from overvoltage when the regulator failed for unknown reasons. Credit: http://blog.kevtris.org/

Resistor and PIC16F872 burned in a Weller WESD51

MagicBlueSmoke — Thu, 05 Nov 2009 02:20:00 +0000

Weller WESD51 fails with a resistor and a PIC burning up with no apparent cause. Weller fixed this under warranty and put a new tip on the iron as a little extra. Credit: http://www.rtach.com/pics/burn2.jpg

Resistors destroyed by RF

MagicBlueSmoke — Fri, 30 Oct 2009 00:14:37 +0000

Resistor was turned into a dipole antenna and coupled to the parts seen. They were destroyed when brought near a 40-50W radio transmitter. Credit: http://www.kevtris.org/