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IR sensor problem

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IMG_20220816_105826.jpgHello everyone. This is a Chinese bldc fan motor drive. The drive is perfectly fine. It turns on both AC and DC input. But it is not giving output neither the IR sensor is working. I change the sensor but it did not solve the problem. The driver MOSFET are good. There is some problem with the sensor area that I could not figure out. Plz help. I need to repair these PCB and return to the coustomer
 

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