XboX Foxlink PSU torched, help? - diyAudio
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Old 21st October 2007, 05:54 AM   #1
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Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
Default XboX Foxlink PSU torched, help?

Ok, kinda out of my element here with SMPS devices.
Heres' the rundown, my clod sister-in-law managed to plug in the XboX directly into 220VAC instead of the 220-110 VAC transformer that was sitting on the floor next to the tangle of power cords.
Yeah she popped audibly & then nothing. I opened the device up and sure enough I found a 470K 1/4 watt resistor was fried (Actually only half fried, could read the colors). Tested the 'burned resistor, came in at some 580K plus...out of spec.
Next to the resistor was, I assumed was a mini fuse a quarter inch in diameter all plastic quarter inch high, marked 4A 250 volt.
Tested it on the multimeter, read open on resistance & didn't swing up as a cap would....logical right?
Would not seem to be the case...rigged up some series/parallel combos & nailed the resistor. Since I didn't have a fuse or holder at that rating I jumped it with some appropriately thin wire, held my breath (was going to rig someting later) & plugged it in.......................Opppssssssssssss. Perhaps that device was NOT a fuse. More noises & the adjacent .22mF 275 Volt cap started "going out".
Ok..perhaps I should have started with a schematic & gone from there..........removed & tested each component.
Can somebody steer me here with a schematic, some experience with this device? No I'm not an electronics "dummy.......technically challenged" just started out on the wrong foot.
_______________________________________Rick....... .....
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