![]() However, what if U7000 is not stuffed and U6903 is manually enabled. As the ISL9239 is a bear to solder on without the Amtech flux which we currently do not have nor a microscope, wish to ask a few questions before proceeding further:ġ) Is the ISL9239 required to be present to allow for the 20V power delivery contract to be enabled?Ģ) In tracing the schematic, see that the EN (PM_EN_P3V3_G3H) of the Maxim 3v3 LDO (U6903) originates from ISL9239 (U7000). After reviewing, the ISL9239 (U7000) was removed pads cleaned found a few bad tantalums that were shorted downstream and they have been now replaced. ![]() Tested with a Type C PD tester and an external power supply which originally dialed up 20V contract but the current draw was very low (close to 0 mA). The unit just decided to not power up one day so it was brought in to us for repair. Been at this Macbook Pro repair for a while.
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