Electronics > Beginners
Help with diagnose a PCB
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cs.dk:
So it's dead again |O |O Worked fine for at least a month without trouble.

It's a OnSemi LM358DG; Datasheet

It should handle 32V on the powersupply. However, the datasheet shows this graph, which is extremely close to a 12V battery/alternator system.

fcb:
Can you add a series resistor and shunt zener to the power supply to the LM358 - this will help with load-dump events (which is one possible mechanism that's killing your IC).
cs.dk:
I changed the "dead" LM358, when it failed - Maybe it was just a cold joint. The machine is still running good
This time, I took much more time and effort to do the rework, and inspected the joints with a magnifier. There was a few pins that i had to give a go 2-3 times to get them good. I expect that my first approach was to quick.
cs.dk:
They wasn't in stock when i ordered at that time. So i thought another brand would do the same thing.

Anyway it works now. I think my first attempt at repair was to crappy.
cs.dk:
Sorry for nekro posting..

The LM358 is dead again after ~1½ year of use. This is really annoying.

The problem is, i don't know if it's overload, overvoltage, or what ever may kill it.. Seems strange though. Manitou have 1000's of machines running all around the world. Could the design really be so bad?
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