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DamonZ28
New Member
USA
4 Posts |
 Posted - Mar 04 2007 : 5:04:03 PM
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| Aaron, I saw your post on a blog about repairing the IBM Netvista inverter board by replacing one of the FL fuses. On my inverter board (TDK TAD439 EA02439T), I'm assuming the fuses are the cylidrical tubes wrapped in a copper-colored wire, stamped with a 101 on the end. Is that correct? I don't see anything on my inverter board labeled "fl" - these appear to be marked L1 and L2 on the board. I can provide a pic of my board, if necessary. |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Mar 05 2007 : 10:15:36 AM
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The fuses are very small, only about 3MM long by 1.5MM wide, and are located near the white plug. They are rectangular and there is one right beside (or on top, depending on how you look) the other.
You are looking at inductors, not the fuses. Let me see what I can do for a picture...
Download Attachment:  IBM NetVista InverterFuse Fix.jpg
42.71 KB
The highlighted area are the fuses. If you look closely you can see that a fuse was already replaced on this board. The fuse to the left is the one that almost always fails.
You can replace it with a 3A surface mount fuse. I was able to order the LittelFuse "FL" part directly from my local electronics store with only the part number "FL". |
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DamonZ28
New Member
USA
4 Posts |
Posted - Mar 05 2007 : 6:42:04 PM
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| Great, thanks a lot! That's what I was looking for. Now I'll see if my wife's brother's soldering skills go that small. |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Mar 06 2007 : 09:33:21 AM
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| Most of the time we cheat when we repair these boards and simply solder the new fuse on top of the old one. It's a lot easier then doing a proper replacement and can be done with a regular soldering iron instead of SMT soldering equipment. |
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DamonZ28
New Member
USA
4 Posts |
Posted - Mar 06 2007 : 6:51:04 PM
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| Hey, whatever works! That sounds good to me. Do you basically just plop down some solder, and stick the fuse in it? Or is there more to it than that? |
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grimzella
New Member
1 Posts |
Posted - Mar 07 2007 : 9:46:31 PM
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YAY!!! thanks for the help... this procedure worked out perfectly... except ... my fuse happened to be the one on the right. either way,, if it was not for this thread... i would have spend 70.00 on a new inverter board.... thanks again guys.
Dave |
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DamonZ28
New Member
USA
4 Posts |
Posted - Mar 13 2007 : 6:05:06 PM
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| You wouldn't happen to have the fuse part number, would you? I'm not having any luck finding one locally. |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Mar 14 2007 : 10:44:37 AM
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| Buy a 3A surface mount fuse. Voltage rating is unimportant. |
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sdutky
New Member
1 Posts |
Posted - May 07 2007 : 1:11:44 PM
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Can anyone tell me the characteristics and pinout for the HV outputs of the TDK TAD439 inverter?
I would like, perhaps, to use this board as a driver for electroliminescent wire.
Thanks, Steve Dutky |
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mikeyeastside
New Member
1 Posts |
Posted - May 11 2007 : 11:24:21 PM
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Thanks Aaron! With your help, I fixed the nice NetVista I found in the GARBAGE today!  Yeah!  I’m going to hook this bad boy up to my router, TV and stereo to use it as an A/V server. I soldered a small copper filament to short F1. Do you think I will have anyside-effects without a real fuse?
Thanks! Double A Ron!
Mike |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - May 12 2007 : 10:51:14 AM
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| I'm not sure the effect of removing the fuse as I've not taken a close look at the circuit. Likely the danger involves damaging other (more sensitive and harder to replace) areas of the circuit should there be a fault. |
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HardwareWard
New Member
USA
1 Posts |
Posted - Sep 15 2007 : 2:25:35 PM
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| I just got a broken IBM Net Vista from work. It seems to have all the symptoms of the previous posts. The screen lights, then goes dark after 1/2 second or so. I've purchased some "Fast-acting, surface mount 3A fuses to repair the inverter, but I want to know if I can just remove the back cover, the inverter cover, and then solder the new fuses on top of the old ones, or is there more intricate dismantling I will be required to do to replace the fuse? Thanks for all the help. |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Sep 18 2007 : 09:33:21 AM
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| Basically, yes. That's how I normally fix them. |
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NetVistaHeadache
Apprentece
5 Posts |
Posted - Feb 19 2008 : 10:28:04 AM
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| Does anyone have these fuses for sale on this board. I would be happy to buy a dozen. I cannot seem to find this fuse at my local electronics store or find the right one on the Internet. If anyone has a link to an Online resource where I could order them that would be great too. I have about 6 Vista's with the same problem and have a potential 20 more that may go bad down the road. Thanks! |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Feb 23 2008 : 10:36:39 AM
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DigiKey sells 3A SMD slow blow fuses at F2604CT-ND for $1.28 each. They are a bit bigger then the factory units but you can still easily solder them in place between the dead fuse and the wiring harness connector.
Don't get exact replacements. They will just blow again. |
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NetVistaHeadache
Apprentece
5 Posts |
Posted - Feb 26 2008 : 1:21:03 PM
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| Thanks Aaron! I will give that a shot. |
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Topic |
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FL Fuse for IBM Netvista inverter
