OK thanks, I can see a smps unit in your top post, then in your post#3 I can see a “kam” unit. Are you saying that the SMPS of the top post is what you found inside the kam unit.?
Anyway, at this point I do not know what load you are trying to drive with the smps unit of the top post. That info is needed, so we can see if you are overloading it or not.
The smps unit of the top post has one 12v,1.5a output and a +/-15v,0.5a outputs.
The 12v one is likely the regulated one, or at least, the most regulated one…….
So if you want to test that smps of the top post……then switch it on first with no load and tell us what voltages you get at the outputs.
Then load the 12V rail with a 12V/1.5A = 8 OHMS resistor (rated for 18w), and again tell us what readings you get on the rails.
Then load the plus and minus 15v rails with 15v/0.5A = 30 ohm resistors (each rated 7.5w) and again tell us what output voltages you get.
Preferably look at the output voltages with a scope over multiple time bases so you can see what its doing dynamically.
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Make sure you have removed all other loads off the outputs for these tests.
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It sounds to me like you are trying to drive laser diodes (?)........and this is worrying because they need a current regulated smps to drive them with, and the smps you showed in the top post is a voltage regulated one....though maybe there is a current regulator between them(?), i dont know.