820-01521 no power

[adriandsl]

Most rails are present except _S5 ones, T2 chip gets hot slowly while plugged in charger.
From what I see _S5 rails are created from 338S00267 PMIC.
Anyone had similar issue?

 

[E1LM]

Most rails are present except _S5 ones, T2 chip gets hot slowly while plugged in charger.
From what I see _S5 rails are created from 338S00267 PMIC.
Anyone had similar issue?

wet?

 

[adriandsl]

Yes, the battery circuitry was destroyed by corrosion, but the board has no sign of it. Here are my tests: https://docs.google.com/spreadsheets/d/1QaLW4DIwtzQ_cwxgZPA67RDwPTHAB4m2lv5B8M-XlXw/edit#gid=0

PP1V_PRIM 0 V probably means dead PMIC, 338S00267 and nowhere to find it currently.

 

[E1LM]

Yes, the battery circuitry was destroyed by corrosion, but the board has no sign of it. Here are my tests: https://docs.google.com/spreadsheets/d/1QaLW4DIwtzQ_cwxgZPA67RDwPTHAB4m2lv5B8M-XlXw/edit#gid=0

Take measurements in diode mode on these lines.
PP1V8_S5
PP1V8_S3
PP1V2_S0SW
PP1V_S0SW
PP1V2_S3
PP1V_S3
PP3V3_S5

 

[E1LM]

Hablas español?

 

[adriandsl]

Hablas español?

No, english.

 

[adriandsl]

Take measurements in diode mode on these lines.
PP1V8_S5
PP1V8_S3
PP1V2_S0SW
PP1V_S0SW
PP1V2_S3
PP1V_S3
PP3V3_S5

Updated document.

 

[E1LM]

Updated document.

You should follow the line PP3V3_S5, it is strange that you do not have the signal there.
Did you use diode mode with red terminal in GND and terminal COM in coil?

 

[adriandsl]

You should follow the line PP3V3_S5, it is strange that you do not have the signal there.
Did you use diode mode with red terminal in GND and terminal COM in coil?

Yes, I updated the measurements.

 

[E1LM]

Yes, I updated the measurements.

With power supply, inject in PP3V3_S5 | 3V and see if it consumes / heats any component.

 

[eduardoferreiramoura]

Yes, I updated the measurements.

Did you fix that? I have same problem. Do you think that may it be t2 chip? Thanks