Missing PP3V3_SUS

Hello,

Today I'm working on a board that came back from a customer because it no longer works after about 3 days ...

I cleaned the board so well that I no longer know what was repaired ... It seems that there was a short circuit on PP1V2_S3 because traces of soldering shows that I injected a voltage ... (The short has been eliminated)

PPBUS_G3H 8,5V
PM_BATLOW_L 3,3V
SMC_RESET_L 3,3V
SMC_PM_G2_EN 3,3V
SMC_ONOFF_L 3,4
PM_PWRBTN_L 3,3V
RTC_RESET_L 3,3V

PCH_DSWVRMEN 3,15V (normal ?)
PCH_INTVRMEN 3,15V (normal ?)

PM_SLP_S5_L = 0V
PM_SLP_S0_L = 0V
PM_SLP_SUS_L = 0V
PP3V3_SUS 0V
PM_RSMRST_L 0V

When I try to turn on, the PM_SLP_S5_L pulses up to 3.3v and falls back.
The board does not start in smc bypass.

PM_RSMRST_L 0v is most likely caused by PP3V3_SUS 0v.
Who is responsible for PP3V3_SUS?

Thanks in advance
 

2informaticos

Administrator
Staff member
PCH controls PM_SLP_Sx_L; but expects another signals from SMC and all RTC signals must be goos.
What about PCH_INTRUDER_L and PM_DSW_PWRGD?
I supposed 3V3_S5 is present.
 
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