A3113 / 820-03285 5v ppbus 12v

[yair37]

no water damage
ppbus_aon 12v
cahrger 5v 0.4a
no short on board.
no dfu mode.
LDO looking good.

 

[2informaticos]

Both USBC ports with exact same behavior?
Do you mean all U8100 & U7700 LDOs are stable?

 

[yair37]

yes both USBC ports are the same behavior..i will check also on u8100 and u7700, i was check just around UF5...

 

[yair37]

PP3V3_S2_LDO 0v no short(0.500)
PP1V5–LDOINT 0v no short

 

[yair37]

PP1v5_LDOINT_MPMU 0v no short
PP1V5_LDOINT_SPMU 0v no short

 

[2informaticos]

None of U8100's LDO present?
LDO11 is derived from a buck, but all other LDOs must be present at same time with 3V8_AON.

 

[yair37]

yes...there is just 2 on u8100:
PP1v5_LDOINT_MPMU and PP3V3_S2_LDO do i miss something...

 

[2informaticos]

Discarding "NC" marked ones, you still have more to check; page 44, VLDO2/7/8/9/10.

 

[yair37]

PP3v8_AON - 3.8v
PP1v25_s2 - 0v
PP1V05_S2SW_VDD2H - 0v
PP1V8_AON - 0v
PP1V2_AWAKE_PLL - 0v
PP0V855_S2SW_CIO - 0v
PP1V2_S2_CIO - 0v

 

[yair37]

PP1v8_AON is 1.8v no 0v...all the AON correct

 

[2informaticos]

Check diode mode to ground on missing LDOs.

Also check voltage and diode mode on U7700's LDOs.

 

[yair37]

Update, i was fins full short on PP5V_SPMU_BSTLQ_XW (C7701) i was take it out, now there is no short but still 5v
PP0V72_S2_VDD_LOW -0v no short
PP1V2_AON_SPMU - 1.2v
PP1V8_AON_SPMU - 1.8v
PP1V5_LDOINT_SPMU - 1.5v
PP1V25_AWAKE_NAND_VCCQ - 0v short..was injuct 1.5v - u7700 getting hot...i was take u7700 out but still short even witout u7700 but nothing getting hot

 

[2informaticos]

"still short"
Exact resistance (ohm scale) to ground?