820-00840 water damage dead.

yair37

Member
get it from other lab they try to fix and clean, the water damage was at the backlight erea.
i get 20v at charger.
ppbus-13v
pp3v3 is 3.3v
pp5v_s0 0v

U7650 voltage:
Pin 12 is 0
pin 21 is 0
pin 23 is 13.10 volts

SMC_PM_G2_EN 3.3v
 

2informaticos

Administrator
Staff member
PMIC_SHUTDOWN_L stays high?
No pulse detected at PM_EN_P3V3S5 when connect the charger?
PP1V25_VREF and PP3V1_RTC both good?
 

yair37

Member
o.k i was replaced U7650 now i have pin 12 (P5VVX_EN) 3.4V and pin 21 (P3V3S5_EN) 3.4V but still PM_EN_P3V3S5 0.03 when plug charger.
 

2informaticos

Administrator
Staff member
I was expecting you change R7662 at least...

What is R7784?
Did you get confused between PM_EN_P3V3S5 and PM_EN_P3V3S5G???
 

2informaticos

Administrator
Staff member
"there is no PM_EN_P3V3S5 on board"
I considered a technician can make an equivalence between schematic and boardview; but not such afirmation!!!
Seems that you've never checked the expected signal, when I asked for.
So again, what is PM_EN_P3V3S5 level???
I'm sure pin 1/R7662, or pin 5/U7890 cannot have another function on YOUR board.

BTW, I didn't ask for a screenshot of R7662.
Just mentioned to change it, because of your misunderstood; cannot have 0V and 3V on two pins of a 0 ohm resistor.
No idea that you didn't even check at pin1...
 
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