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Can bus computer burnt out (infosec.pub)

submitted 1 week ago by Aussiemandeus@aussie.zone to c/askelectronics@discuss.tchncs.de

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This is what's known as a Master 4 module in a LHM550 Liebherr harbour crane.

Earlier this week it was hit by lightning causing the module to output a combined 8 volts out on the can line 3 circuit.

The rest of the module works fine, all functions work except anything related to can line 3.

Can line 3 output is the 2nd white plug port on the top left of the photo.

I know it's probably a long shot but does anyone have any familiarity with these kinds of things?

I have added a couple more photos in the comments.

I couldn't visually see any sort of obvious fail point.

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[–] jqubed@lemmy.world 11 points 1 week ago (1 children)

Does Liebherr not support this model anymore? For something like controlling a harbor crane where failure could be deadly I would think they should be the first point of contact and they should probably just be going ahead and sending a replacement part. Lightning can do weird damage to electronics even without a direct hit, so even if you find and fix a more obvious problem something else could be lurking that bites you later. When that’s controlling something that moves tons of cargo through the air I would think the safest course is to just replace the damaged part.

[–] Aussiemandeus@aussie.zone 5 points 1 week ago

Replaced already was just an exercise in curiosity.

Liebherr don't repair them they just sell a new part.

(I used to work for them before going independent)