Chosen Solution

1-Hello, can someone tell me the polarity of this two diodes please ? 2-Why D1589 isn’t on the schematic ? It just appear de D1501 on the backlight sub schematic…

here are both

You (@iartur) have the wrong schematic. There is an incorrect version of the 6 Plus schematic floating around, it’s actually an iPhone 6 schematic instead but named incorrectly. The proper iPhone 6 Plus schematic has the following board number (BRD 820-3675) in the bottom left hand corner of the first page.