820-00239 5V 0A-0.25A cycle

[ajdoc]

Got 5V on charger and 0A, every few seconds it go to around 0.25A (so should switch to 20v) and then back to 0A.

Cant find any corrosion.
PPBUS 0.02V (0.440 in diode mode)

Removed F7000 and still on F7000/1 got 0.02V.

All diode valus on LDOs around all CD3215 are correct.
Voltages are correct as well (pulsing of course) just on all CD3215 PP1V1_UPC_XB_LDO_BMC is stable 0V (diode mode is correct).

Any idea?

 

[2informaticos]

What about 3V3_G3H voltage?
Check it in diode mode too.

 

[ajdoc]

3V3_G3H have 3.40V and 0.350 in diode mode.

 

[2informaticos]

Post U7000's basic voltages (F7000 disconnected): P_IN, AUX_DET, SMC_RST_IN, VDDA/P, SMC_RST*, AUX_OK, A/BMON.

 

[ajdoc]

P_IN 5.14V
AUX_DET 1.28V
SMC_RST_IN 0.0V (0.586 in diode mode)
VDDA 5.12V
VDDP 5.12V
SMC_RST* 3.4V
AUX_OK 3.4V
AMON 0.0V (0.586 in diode mode)
BMON 0.0V (0.586 in diode mode)

 

[2informaticos]

Surely no voltage at C7050?

Check resistance (ohm scale) over C7020/23.

 

[ajdoc]

"Surely no voltage at C7050?"
Correct, no voltage (0.535 in diode mode)

Resistance (ohm scale):
C7020 2.6ohm
C7023 2.8ohm

 

[2informaticos]

You may need to change U7000.
I recommend to check first Q7030 and their adjacent components and traces.

 

[ajdoc]

All looks fine around Q7030.
Rwplaced U7000 and same issue.

Any chance one or more CD3215 is/are faulty?