Electrical Engineers / Computer Hardware Enthusiasts: Replace fuse in computer power supply?
June 27, 2007 11:57 PM Subscribe
Electrical Engineers / Computer Hardware Enthusiasts:
Replace fuse in a computer power supply?
posted by itheearl to technology (10 answers total)
I was recently given a 1U rackmount P3 server from a place where i do some computer work.
The fuse in the power supply was blown. You can actually see a film on the inside of the glass where the fuse element melted.
The was a glass BUSS fuse, must be a 5x20 mm size, with markings 'F6.3A L 250V'.
Is this a long-blow or a short-blow fuse?
(I was thinking the L might mean long, but not sure)
The fuse was in a holder (meant to be replaced?), none of the other components in the power supply have visible damage, and I had the computer going for just over an hour on another (desktop) power supply.
(There are also three of those little blue disks (MOVs?) right next to the fuse holder... if i recall, those provide some sort of surge protection?)
The computer itself is a clone, with less dust than i'd expect to see in a year old desktop computer - let alone a computer that was built in late 1999.
If i can get the power supply fixed or replaced ($50 +... ouch), the unit would make a great storage server or media player (think .avi on a tv).... but i'd much rather spend that $50 on a pci to sata card or a pci video card with tv out... and i'm not willing to jurry rig the thing up to a full size power supply on a permanent basis.
The most recent 'date modified' i could find on any of the files was 12/10/2006, which would lead me to believe that computer was running fine until at least that date... and that winter weather may well have caused a power surge.
Radio Shack has a '6.3A 250V 5x20mm Slow-Blow Glass Fuse (4-Pack)' Catalog #: 270-1068...
I was thinking of replacing the fuse,
testing the power supply with a paperclip (green to black), a dummy load (10 ohm 10 watt resistor from red to black), and an led (grey to black),
then using it on a junker computer,
and then using it if that works...
Once back in the computer, the supply will be enclosed by two layers of fairly thick steel... as long as i dont have it near carpet or drapes, i'm not going to burn down my apartment complex... right?
(Specs on power supply at: http://www.sparklepower.com/pdf/MPW-6150F.pdf)