SOMETIMES AUTO POWER ON AND WORKS WELL 0.626Amp USB INIT TESTED

Beside ANOTHER TIME POWER ON TRIP 0.075Amp

1.2V DDR4 RAM SUPPLY WAVEFORM DC SIDE AND SW SIDE AS BELOW. 3.3V FOR524mS.

3V ON LDO AND POWER SWITCH, BUT NO SM BUS VOLTAGE

ACFET RBFET 24V

WHEN 1.2V SUPPLY TRIP TON PIN9 VOLTAGE ALSO DROP. SO  FOUND uP9002Q Chip faulty

REPLACED BY RT4248A  ALL GOOD

RT4248A RICHTECH 5E IS COMPATIBLE WITH uP9002Q  

EASY TEST PINS: PIN12 VDD 5V, PIN8 EN,PIN9 TON,PIN18 BST,PIN20 VTT AND PIN10 PG

Full Repair Ref. manual uploading soon.

FOR MORE EASY AND BRIEF CASE STUDY STAY LOGIN:    www.EasyMB.in