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Question about some missing components on a ST-V

Orakelschaf

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I got a ST-V from a friend, which is currently not working.

I found some missing / altered components on the pcb and would love to know why those were altered. Maybe some kind of mod i don't know of?

The board was working fine with those missing components - This is not a request for help on the not working pcb, i only want to know why the components are missing/altered :)

- C573 and C571 are missing caps
- R100 should be a 100 Resistor, but was replaced with a different component - See attached photo.
- C2 and C4 caps were replaced (original 100uf 16V -> 100uf 35V) which is okay, but only those two caps were replaced, none of the other caps are altered
- all other components seem to unaltered (Besides CPU2 has been already reflowed)

Is this just a bad repair attempt? Is this some kind of mod? - By looking at the bad solder work: i bet this is not factory work :D

thanks in advance
 

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Last edited:
Here are some pictures of mine. If that could help.
 

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