Tool/software:
Hi Team,
Used AMC1200.
Problem point: ICT testing found that the sampling current deviation was too large when testing U-CUR and V-CUR. The defect rate exceeds 15%.
1. After directly replacing AMC1200 from different batches, the test was OK.
2. It is also OK to perform pin soldering or high-temperature baking on the NG tested material.
But there was still one piece of board heating that was ineffective, and replacing it with a new optocoupler was also okay.
Help analyze the reason, thank you!
