Hi, just fried my V1.1 board i won on the giveaway by accidentally putting a reverse polarity into it, and want some help on where to look to find the fried components. Thanks in advance!
73 de PP2SOX
Reverse polarity fix
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Re: Reverse polarity fix
In fact there is polyfuse in schematics, so it should recover. But in some cases it can be desoldered itself...
Try to check components in this part, if you are lucky) :
https://dl2man.de/wp-content/uploads/20 ... _1_2-1.pdf For improvement, I recommend to use diode in series of positive pole, to have better protection in wrong polarity cases. Power current is not so high, yes better solution is to use mosfet in diode mode, with almost zero loss.
Try to check components in this part, if you are lucky) :
https://dl2man.de/wp-content/uploads/20 ... _1_2-1.pdf For improvement, I recommend to use diode in series of positive pole, to have better protection in wrong polarity cases. Power current is not so high, yes better solution is to use mosfet in diode mode, with almost zero loss.
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Re: Reverse polarity fix
He has a Rev 1.1 Board, which does not have those reverse polarity protection parts.
So:
Replace the burnt parts and start working from there.
If you´re lucky it´s just the 2 capacitors.
If you´re unlucky, you need to change some IC´s.
Basically every IC and even PA FETs can be affected.
Depending on for how long and how much current was involved....
73 Manuel; DL2MAN
So:
Replace the burnt parts and start working from there.
If you´re lucky it´s just the 2 capacitors.
If you´re unlucky, you need to change some IC´s.
Basically every IC and even PA FETs can be affected.
Depending on for how long and how much current was involved....
73 Manuel; DL2MAN
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