I'm currently writing this on my now functioning Dell 470! Much to my delight my pieces arrived yesterday in the mail. I soldered in a replacement thermistor and fuse. So far so good! Thanks Toasty!
jrm000kc
Member
Last Activity: 02-23-2013, 10:37 AM
Joined: 02-01-2013
Location: Kansas City, Missouri
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Re: Dell Precision 470 Workstation
I'm currently writing this on my now functioning Dell 470! Much to my delight my pieces arrived yesterday in the mail. I soldered in a replacement thermistor and fuse. So far so good! Thanks Toasty!
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Re: New Members - please post your introductions here
Hello all! I found this site looking for info on repairing the PSU for a Dell 470 Precision since they're hard to find and expensive. Many thanks to Toasty for giving me the info to order the correct parts to repair the PSU myself.Leave a comment:
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Re: Dell Precision 470 Workstation
I was able to order just one. I was going to order this one-a LittleFuse series 314, Digikey# F1772-ND, but that was just the fuse itself w/o the pigtails. The one I did order is Digikey# F3329-ND with 1.5" pigtails. Wow...this was a nightmare experience trying to get the correct pieces I needed!
I will now look at the soldering thread....my next test in my bad trip into electronics. (I do admit that I'm finding my first foray into electronics interesting.)Leave a comment:
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Re: Dell Precision 470 Workstation
Ok nevermind my last post about the fuse holders. Showing how little I know about electronics-I know understand that my fuse is an actually fuse assembly with the leads. The one I ordered was a F3329-ND from Digikey. Their tech service got me straightened out on that aspect because I would have ordered the wrong fuse.
I just finished the order on the phone-now it's a matter of waiting for it in the mail and getting a soldering iron in the meantime. Thanks once again for your help Toasty!Leave a comment:
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Re: Dell Precision 470 Workstation
Thanks a bunch for the part #! The reason I asked about the fuseholder is having no experience, I snipped the fuse out with both crimp holders in place. (Or are they soldered?) I have no idea what they are called. I'm looking at my fuse with both connectors on each end with about 1/4" of wire coming out. Is there a way to remove the fuse holders and re-solder them?Leave a comment:
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Re: Dell Precision 470 Workstation
Sorry to bug you again Toasty, but I need to ask about the fuseholder. I'd like to install a fuseholder that would allow me to replace the fuse quickly without having to solder. Any ideas?Leave a comment:
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Re: Dell Precision 470 Workstation
I'm having a hard time finding an exact match. The closest one seems to be a Honeywell (Mouser#785-ICL155R007-01). The temp variance is -40C to 185C. Mine is -40 to 200C. Is this a close enough match? I'd hate to order it and find out it's the wrong one.
Looks like I'm SOL finding a used power supply. The only option is shelling out $200 for a new one so I'm pretty much stuck with the repair option. I'm hoping it was an overheat problem since the PSU fans were completely plugged-and the act of shutting it off made the fans stop and pushed...Leave a comment:
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Re: Dell Precision 470 Workstation
Would Radioshack have that thermistor? I need a soldering iron anyway-I'll pick up the Weller that they sell. I'm sure I can get the fuse from there-but finding a knowledgeable staff person probably won't happen.Leave a comment:
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Re: Dell Precision 470 Workstation
Thanks Toasty!
I get the SCK057-so what value does the 608 represent?Leave a comment:
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Re: Dell Precision 470 Workstation
I got the fuse out, so no problem figuring that out. My NTC thermistor is exactly the same as the cracked one shown on page 5 of this thread. No manufacturer, just SCR057608. Once I figure out what I need, I'm going to get a soldering gun and replace it along with the fuse I pulled and see what I get.Leave a comment:
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Re: Dell Precision 470 Workstation
So what type/value NTC thermistor do I need? I'm also not sure what type/value the fuse is coming from the plug in.Leave a comment:
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Re: Dell Precision 470 Workstation
If it helps, my PSU reads D550P-00 model number. P/N is DPS-550DB A Dell P/N is D1257 A tech at a surplus store said spending the money on a PSU is worth it. He said the dual Xeon processors are an awesome setup, especially if I could get Windows 7 to work. Anyhow I'm trying to figure out where I could get a replacement thermistor and what kind of fuse I need. I was looking at PSU's on cellularfactory.com, particularly this
ell Precision 470 A-Power AK 750W 20+4-pin ATX PSU w/SATA & PCIe (Black) Dell Precision 470 A-Power AK 750W 20+4-pin...
Leave a comment:
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Re: Dell Precision 470 Workstation
I've given up trying to repair it. What's a good online site that sells these?Leave a comment:
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Re: Dell Precision 470 Workstation
This is my first time attempting to repair a circuitboard. Bridge and choppers are Greek to me. Finding a schematic is like finding hen's teeth-even on the internet.
A guy told me yesterday that snipping out the bad thermistor and replacing the fuse should make it work-unless there's other problems. I'd just replace it but they cost at least $150-and countless companies are throwing them out right now. I guess I'll find a computer surplus/recycling company. These 470's are getting replaced right now so it shouldn't be that hard to find an...Leave a comment:
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Re: Dell Precision 470 Workstation
I have a 470 I purchased from where I used to work. I replaced the useless video card with an NVidia GT 450 and the performance has been exceptional on the newest games out there. She's been a nice PC.
However, last week I shut it down and my wife heard a buzz of electronic death and a burning smell. I took out the power supply (which no retailer has) and I also have a blown NTC1 thermistor. After reading this thread it serves as an inrush limiter correct? It's the only thing I see fried on the circuitboard. I suspect the cheap carpet in...Leave a comment:
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