Subject:
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Re: Handyboard sudden turn off`
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 19 Apr 1999 23:49:14 GMT
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Original-From:
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Gary Livick <glivick@pacbell.&NoSpam&net>
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Viewed:
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1049 times
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Phillip,
This happened to me once, and it was because I had an electrolytic capacitor
installed backwards. You obviously have something drawing a lot of current,
so if you check the caps and everything looks ok, it is somewhere else.
Lacking any better method, try placing your finger on each component and find
what else is getting hot besides the voltage regulator. If that doesn't turn
up anything, take out all the IC's and anything else you can unplug and start
testing again as you replace things until the problem repeats. That will
probably lead to the problem.
Remember, this is supposed to be FUN!
Best Regards,
Gary Livick
http://www.lightwaverobotics.com
phillip chia wrote:
> Hi ,
> I really need help. It's urgent!!!
> When I turn on the HD, the LCD did not appear anything Moreover, the
> program is not running running once I download and pressed start. The worst
> part is that the U13 LM7805 CTB is getting HOT that can burn my finger in
> just a short while.
>
> Once I let the LM7805 to cool down for at least 15 minutes, and start to
> press the start button again, program is running again and the LM7805 is
> not hot .
>
> currently, the battery I using is NiMH 9.6V , 1.3 Ah on the HD.
>
> Is there any damaged in certain components?
>
> rgds,
> phillip
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Message is in Reply To:
 | | Handyboard sudden turn off`
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| Hi , I really need help. It's urgent!!! When I turn on the HD, the LCD did not appear anything Moreover, the program is not running running once I download and pressed start. The worst part is that the U13 LM7805 CTB is getting HOT that can burn my (...) (25 years ago, 19-Apr-99, to lugnet.robotics.handyboard)
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