Important power lines and their resistances?
Hello. I have an iPhone 6S logic board with a small current leakage (20 mA). Could somebody please tell me what are the important power lines on this phone and what are their expected resistances, so that I can measure the resistances of my board' s power lines and compare them to the theoretical values?
Update (06/16/2022)
iPhone 6S, water damaged. Hasn' t been dropped. Doesn' t power on. The resistance of the PP_VCC_MAIN is around 400 ohms, which I think is normal. I need to know which other power lines I should measure to find what' s the problem.
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5 comentários
How do you know it has a 20mA current leak? When you measured PP_VCC_MAIN did you have the multimeter in diode mode with red probe on ground?
por Chris Stables
I connected a DC power supply at 4V to the battery FPC, and the current draw was 0.02A
por Sus Amogus
@cavemahn What is the diode reading on “PP_VCC_MAIN” and “PP_BATT_VCC” Red probe on ground.
por Chris Stables
PP_VCC_MAIN is 450, and PP_BATT is 660. Shouldn't they be smaller?
por Sus Amogus
@cavemahn PP_VCC_MAIN “0.420” PP_VCC_BATT “0.414” You said it draws 20mA is that before prompt to boot? If so what does it draw when prompted to boot?
por Chris Stables