Subject:
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Re: Broken charger board...still broken
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 27 Jan 2002 21:07:23 GMT
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Viewed:
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2978 times
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Be sure you get the proper Max232 chip. I bought another, because I was
having serial port problems, and thought it might be the Max232 chip... But
the new one I bought wasnt *quite* right. What happened was in IC I could
download pcode if I tried it twice. At first I thought I would just deal
with the problem, but all the other downloaders failed.
I don't know the differences, but this one is labeled "ST232ECN", and
doesn't quite work. Fortunatly I still had the original that came with the
kit, which really wasn't bad, and my problem was resolved.
Sam
"stefano franchi" <s.franchi@auckland.ac.nz> wrote in message
news:GqLI1F.KCt@lugnet.com...
> Hi all,
>
> just in case anyone feels like helping, I thought I'd post an update on • the
> current (and very sick) state of the charger/interface board I accidently
> turbocharged by plugging the 120V adapter into a 240V outlet.
> As stated in a previous posting, I went through the recommended test in • the
> assembly manual and found that (1) the board passes the first series of
> tests (input voltage is correctly reduced to 5V); and (2) it miserably • fails
> the successive test of the serial circuit..
>
> Following the assembly manual suggestions, I dutifully replaced all the
> capacitors from C10 to C13. I also replaced (following a suggestion by a
> member of the list) C15.
> Nothing changed. I get almost exactly the same voltage reading with the • new
> capacitors in place: a measurement of the voltages between the pins of • U16,
> as recommended by the assembly manual, indicates about 3 volts between • pins
> 2 and 7 (instead of 9/10V), and -0.4 between 6 and 7 (instead 0f -9/10). I
> am thinking that perhaps I blew up the IC and I'm going to replace that
> tomorrow, after which I'll be out of ideas.
>
> Any suggestion, further test, sudden illumination, insightful comment, • etc.
> greatly, greatly appreciated.
>
>
> Stefano
>
>
>
> _____________________________________________________________
> Stefano Franchi
> Department of Philosophy Ph: (64) 9 373-7599 x3940
> University Of Auckland Fax: (64) 9 373-7408
> Private Bag 92019 s.franchi@auckland.ac.nz
> Auckland
> New Zealand
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Message is in Reply To:
 | | Broken charger board...still broken
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| Hi all, just in case anyone feels like helping, I thought I'd post an update on the current (and very sick) state of the charger/interface board I accidently turbocharged by plugging the 120V adapter into a 240V outlet. As stated in a previous (...) (23 years ago, 27-Jan-02, to lugnet.robotics.handyboard)
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