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SMPS' improper lower current output than the rating 2.5 A

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abdulbadii

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As try fixing SMPS having improper lower current output than the rating 2.5 A 24V, encountered that the SMPS gives output 24 V if Q is used in normal i.e. jumper is closed, but 35 V if it opens, all without sufficient current/power produced as the claimed rated one

QOo1u.jpg


Any clear make-sense reasoning why it is so, and what is the culprit that fails having the proper, adequate current/power, so that can troubleshoot and fix the best way?
 
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