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Repair of 2007 Victor 884
Ok... I give up. What is the secret of opening up a 2007 Victor 884 that has no screws on the bottom or top?
Seems like Innovation First doesn't want to make it easy to get to the circuitry like we could with the 2004 884. |
Re: Repair of 2007 Victor 884
Push and pry. It breaks the case when you do it, so you'd have to reassemble with glue. Also, the transistors used in it are not a real easy to find item if I recall.
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Re: Repair of 2007 Victor 884
Chris,
A putty knife or some other long object inserted around the base will open the case. It is just friction fit. Be patient and don't try to pry open one side too far before moving on. |
Re: Repair of 2007 Victor 884
Al,
Friction is a kind word... more like #%^$*& stuck for good. So I had to push and pry and of course several of the little black pins snapped off like sanddrag said but its open. I think Innovation First was out of their minds to save a little on screws. Now I begin the search for some 3103 Fets. |
Re: Repair of 2007 Victor 884
Digi-Key sells them. There is an alternative number IIRC, try this post
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Re: Repair of 2007 Victor 884
I have a 2007 victor 884 and it used Infineon IPP042N03L FETS available from digikey.
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Re: Repair of 2007 Victor 884
Chris,
Maybe the FETs over temped and melted some of the case together. I have opened several over the years and didn't have that much trouble. Sometimes it is helpful to show a team just how much crud can build up inside on the robot. |
Re: Repair of 2007 Victor 884
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http://www.infineon.com/dgdl/SPP_B_4...12b4271adf3b95 So we only have 42 amps instead of the 60+ from the IRL 3103. This shows up as an obsolete item on DigiKey: http://search.digikey.com/scripts/Dk...SPI42N03S2L-13 Also noticed the board is marked 883 Rev F. Anyone come across a ckt for an 883/884 yet or are we stuck with generic ckts? |
Re: Repair of 2007 Victor 884
They are wired in parallel for 126 amps each leg. Slightly higher series resistance.
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Re: Repair of 2007 Victor 884
I don't have time to do it this morning but I believe the IPP042N03L G matches ok with the others. You can check the data sheet for the match ups. I believe I used these and they seem to work fine.
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Re: Repair of 2007 Victor 884
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IRL3103 30v,12mho,64 amp 2004 Victor 2n03L13 30v,12.9 mho,42 amp 2007 Victor 042N03L 30v,4.2 mho,70 amp Gdeaver replacement So the 042N03L looks more capable and would make a nice substitute. But this raises a question: What constitutes a First legal 884? AllElectronics is a few blocks from me and has a stock MTP75N03HDL http://www.datasheetcatalog.org/data...75N03HDL-D.PDF MTP75N03HDL 25v,9 mho, 75 amp AllElectronic sub This might work too, but probably shouldn't be legal for competition right? |
Re: Repair of 2007 Victor 884
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Re: Repair of 2007 Victor 884
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Re: Repair of 2007 Victor 884
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Chris, If you have blown FET’s on your Victors, we generally don’t attempt to repair them. There are parts that have been compromised beyond just the FET’s and the cost becomes more to repair than to replace. Regards, Tom Watson VEX Robotics (903) 453-0820 |
Re: Repair of 2007 Victor 884
Has anyone actually successfully repaired one? It seems there are large copper busses in the middle of the board, which sink all the heat away when trying to clear the through-holes. After giving this a try, I now know why IFI doesn't bother repairing any.
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