Subject:
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Re: I played with fire...
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Mon, 27 Aug 2007 14:20:52 GMT
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Viewed:
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12317 times
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> I applied 9V AC power to a RCX 2.0... yes yes, DC is required.
>
> Does anybody successfully repaired such a disaster ?
>
> Here are pictures pointing to what I think burned out. What is that component ?
> Anybody successfully replaced it ?
>
> http://www.brickshelf.com/gallery/pbegin/Divers/damage1.jpg
> http://www.brickshelf.com/gallery/pbegin/Divers/damage2.jpg
>
> I have soldering habilities and multimeter...
>
> Any alternative course of action to suggest ?
>
> Thanks for the help.
Hello Patrick,
Your RCX2 version is completely new to me - That't very interesting... more on
that later (btw, would you have a photo of the other side of the board?).
The component you show as burnt is most probably a power diode, as suggested by
Juergen. It is easy to replace, but if this rugged device was damaged by your
hasardous AC power-up, most probably your RCX is definitely destroyed.
But there is some hope... though I don't know precisely your RCX version, it
looks like it is protected by the same surface mounted fuse that trips very
easily and protects effectively the board.
This fuse is located here
http://www.brickshelf.com/gallery/Philo/RCX-comp/damage1.jpg (circled with F
label). On all RCXs I have this is a 1.5A fast blow fuse, size 1206. Check with
your multimeter, it should have a very low resistance (less than 1 ohm).
Finding this kind of part is not very easy, you may solder a little wire across
it to see if your RCX is working once the fuse is replaced. If that revives your
RCX, then I strongly suggest you replace the wire and burnt fuse with a new
one!!!
Philo
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Message has 2 Replies:
 | | Re: I played with fire...
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| Well, Philo did it again, Hourrah for him... I bypassed the fuse and the RCX came back to life. Now, will I be carefull enough with my RCX without a fuse or should I replace it ? (17 years ago, 2-Sep-07, to lugnet.robotics.rcx)
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Message is in Reply To:
| | I played with fire...
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| I applied 9V AC power to a RCX 2.0... yes yes, DC is required. Does anybody successfully repaired such a disaster ? Here are pictures pointing to what I think burned out. What is that component ? Anybody successfully replaced it ? (URL) have (...) (17 years ago, 24-Aug-07, to lugnet.robotics.rcx)
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