Part 431KD20 Varistor
Part 431KD20 Varistor
These varistors were protecting a transformer when they died. The transformer was protected as the fuse blew – thanks to the varistors. Credit: bhungy
Posts Tagged ‘fried’
Part 431KD20 Varistors blow
Sunday, January 24th, 2010Xbox PCB charred
Saturday, January 23rd, 2010
Xbox with charred PCB
Xbox with charred PCB
Two views of the same xbox board that not only lost the blue smoke but also lost the black smoke. Credits: Daniel Celion from Sweden.
Motherboard with badly damaged PCI slot traces
Monday, December 14th, 2009
Credit: Anonymous
Varistor on UPS cracks
Friday, December 11th, 2009
Board with blown MOV
Closeup of failed MOV
The burned part shown appears to be a MOV (Metal-oxide Varistor). The purpose of a MOV is to have a very high resistance until a certain voltage is reached at which point it will conduct current, in this case from “Hot” to “Neutral.” This property is useful for surge protectors. Original poster says this UPS was involved in an electrical fire. Credit:
Xbox power supply failure damages pcb
Friday, November 27th, 2009
This appears to be an Xbox revision 1.1 where the power supply failure caused significant damage to the PCB. The vented capacitor in the picture is a 680uF/16V capacitor which shorted, damaged the FET, and led to the failure of the power plane. Ideally the power supply should sense failure conditions and shut down. The FET was a Philips 21N06. Credits: Ahmad Tabbouch of http://ultrakeet.com.au.