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A bug in the system. (aussie.zone)

submitted 19 hours ago* (last edited 13 hours ago) by tuff_wizard@aussie.zone to c/askelectronics@discuss.tchncs.de

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Merlin rollerdoor (Australian garage door brand) stopped working, when investigating I found a bug had shorted itself across an IC (labeled HVS004).

Luckily Merlin sells the whole replacement unit for only $449AUD. Before I pull the trigger on that I was wondering if anyone here could advise me on my chances of success if I just replaced the burnt bit.

I’m happy with larger electronics but I’m struggling to even identify any fuses on the board to check.

I’m also unable to find a replacement IC online as the code on it seems to be associated with some kind of blue LED. (I also don’t know for sure if the IC needs to be programmed or if it is just standard)

The back of the board is fine, just thru-hole solder connections.

here are some more photos(new link, should work now), hopefully in good quality.

Thanks in advance

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[–] pcgaldo@lemmy.ml 1 points 8 hours ago* (last edited 8 hours ago)

When you identify the component and find replacement, before welding and testing, check that there are no short circuits on the tracks. Pay particular attention to those surrounding SMD capacitors and diodes.

If you have a lab power supply, you can try to see if they heat up by injecting 1 volt and limiting the current to 1.5 ampers. If you don't know how to proceed, there are videos out there that explain it.