Gen 2 (type 20T

Due to low melt solder being used from manufactory, typical charging circuit runs at 50~70C degree. The power Mosfets and PD control IC solder separates from Mainboard overtime.


 * NOT CHARGING
 * 20v request but no current draw: Check QB5, QB6 mosfets, they are on the hot spot and very easy get off the mainboard by factory low melt solder. Re-tin the board& ic side with high temp solder.(clean up the factory solder before applying high temp solder)
 * No 20v request: TPS65994AD BGA balls might cracked due to lack of mainboard thickness/strength. Reball them if 20v not request from charger or replace the chip if needed.