in this video number {770} SMPS Is Not Working || SMPS Not Turning ON. i explained how to troubleshoot, test and repair UC3842 current mode smps controller ic to provide 24V 2 ampere in flyback topology. this 3842 ic belongs to a complete family of KA3842, TL3842, MIC38HC42, UC3843, KA3843, TL3843, MIC38HC43, UC3844, KA3844, TL3844, MIC38HC44, UC3845, KA3845, TL3845, MIC38HC45, all the above mentioned ics have approximately similar circuits. i found the smps controller, vcc capacitor, vcc rectifier, and 2x zener rectifiers, and one SCR in protection circuit.
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