in this video number {972D} Standby power signal path in LG Inverter AC Board part-5. i explained and demonstrated how to repair lg dc inverter ac outdoor unit board (it is used with EBR758794 EAX64913701 for ARUN040GSS0, ARUN050GSL0, CRUN040GSS0) having STR3A155D based smps switch mode power supply. in this board the offline switching ic STR3A155D marking 3A155D was damaged. i replaced with equivalent ic ICE3BR1065JF. i explained with datasheet. we an replace str3a155d ic with ICE3BR1065 or TOP249YN. when using top249Y ic, pin number 5 and 1 will be connected together to obtain half frequency option at 66KHz, otherwise TOP249Y will switch at 132 KHz
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#inverter #outdoor #unit #board #kia278r15pi