820-01949 20v 0.041A

ajdoc

Member
Liquid damage on U9000, J3300_CWR
Tested with board only.
No shorts on big coils.

When charger switch from 5V to 20V so first couple of seconds it takes 0.26A-0.31A and then drop to 0.041A and stays at 0.041A.


PPBUS_G3H - 12.60V
PP3V3_G3H - 3.38V
PP5V_S5 - 5.15V
PP3V3_S5 - 0V - 0.335V in diode mode

PP3V3_G3H_PMU_VDDMAIN - 3.35V
PPBUS_HS_CPU - 12.58V
PPVIN_S0_PRIM1V8 - 12.59V
PPVIN_G3H_P5VG3S - 12.59V
PPVIN_G3H_P3V3G3H - 12.60V
PPVIN_G3H_P3V3G3HRTC - 12.59V
PPBUS_G3H_SSD0 - 12.58V

PP5V_G3S - 5.13V
PP5V_S5_LDO - 5.14V
PP3V3_G3H_RTC - 3.38V
PP3V3_G3H_SSD0 - 3.30V
PP3V3_G3S - 3.37V

It goes into DFU but a few seconds after 'revive' it reboot.

Any idea?
 

ajdoc

Member
With battery connected got 20V 0.04A but after a few seconds drop to 5V 0A (every a few seconds short jump from 0A to 0.024A.

When I connect trackpad and tap on trackpad it switch from 5V to 20V but then the same issue.
 

ajdoc

Member
It will make sens about some SSD issue as U9000 is liquid damaged.
All resistors around it got correct readings.
U9000 replaced and all works fine.
Data safe.

Thank you for help.
 
Top