Q15: STP22NE10L / IRL530N / IRL540N
Q21: TIP122
(Topic ID: 232762)
Linked Games
Metallica (Pro)
Stern, 2013
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This is after replacing the transistor?
The continuity checker on your multimeter can verify. I usually compare a leg of the component against a related trace. You can see the traces easily on these boards.
Unless the package is obviously blown (in which case, you'll *know*).. a simple visual inspection isn't gonna cut it. Gotta test it with a meter, ideally one that can do a diode check. Barring that, swap the suspects with known good replacements. But, I tend to avoid risking removing a solder pad until I know I have no other choice; boards aren't cheap to replace.
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