Good day. Unfortunately, we received a complaint from the customer, he soldered on an automatic line and received 70 percent of the scrap. Component leads are not wetted with solder during automatic soldering. The photo shows that the color of the leads is not uniform. The three pins of a component have different colors and shades. In addition, we carried out a solderability test according to JEDEC STD-002D: "Test A - Tin / Lead Solder - Solder Pot / Immersion and Appearance Test". This test confirmed that the pins were not solderable. We have problems for our clients. Could you comment on this case. We tried the recommended profile, but it didn't work. Therefore, we have two questions:
1. Our customer has already tried different thermal profiles, including the recommended one, and they are not soldered.
2. Can you confirm that the Dark color of the contacts (1 or 2 of 3) is normal? This is not a matte shade TI. It's a shade of red to blue on a single pin.