820-00840 5V 0.05A on charger

[ajdoc]

Cant find any corrosion on board.

PPBUS - 0V (not shorted)
PPDCIN_G3H - 5.2V
BUF_SMC_RESET_L - 3.4V
SMC_RESET_L - 3.4V
PP3V3_G3H - 3.4V

LDOs value on both CD3215 are correct.

TBA_AUX_DET - 1.28V
TBA_VDDA/P - 5V
PPVIN_G3H_P3V3G3H - 4.78V
PM_EN_P3V3_G3H - 5.05V

Flashed U2890 but no luck.

Any other idea?

 

[2informaticos]

Remove F7000 and check C7050 voltage.
If missing, check SMC_USBC_INT_L signal.

 

[ajdoc]

C7050 - 0.06V
SMC_USBC_INT_L - 0.005V

 

[2informaticos]

There is a problem on USB-C area then.
Check PPBUS_G3H with both charger and battery connected.

Also check all LDOs on both CD3215 chips; voltage and diode mode.
Compare with good board, if possible.

 

[ajdoc]

PPBUS_G3H with charger and battery connected 11.51V (20V and 0A on charger)
PPBUS_G3H with Battery only 11.50V

LDOs on both CD3215 are both the same and correct in diode mode and voltage.

 

[2informaticos]

Do you get 1V1 LDO_BMC on the powered port?

 

[ajdoc]

Yes, got 1.1V that on powered port.

 

[2informaticos]

Check R5320-22...

 

[ajdoc]

R5320-22 are good.

 

[2informaticos]

Try changing SMC.
Check first U5000 (SYM 2 OF 2) signals and voltages (page 39).

 

[ajdoc]

Checked signals and voltage and all was OK.

Replaced SMC and all works fine.
Many many thanks for all the ideas