(SOLVED) 820-00923 no power no 1v1 LDO

[Jeffotskie26]

hello im back i have a1706 no power no sign of liquid.

PPBUS_G3H 0V 0.430
PP3V3_G3H 0V 0.366

all 1v1 ldo is 0V on all cd3215c00

also i didnt see any shorted caps on other parts.

 

[2informaticos]

Do you get 5V at USB-C meter?
Also check voltage at R7020.

 

[Jeffotskie26]

Do you get 5V at USB-C meter?
Also check voltage at R7020.

yes got 5v on all usb ports. 5.07V 1.37amp freeze, stable to be exact

PPDCIN_G3H and PPDCIN_G3H_CHGR both are 5v as well.

BTW i changed U7000, u3100, ub300 came from working board nothing changes.

can you help what to do next.

 

[2informaticos]

I don't see big differences.

Now is time to get 3V3_G3H; if not, no way to switch to 20V.
Post U6903 voltages.

BTW, I don't see any reason to quote an entire post, visible few centimeters above; nor even if is so short.

 

[Jeffotskie26]

I don't see big differences.

u6903
pin1 0.06v
pin2 0.90v
pin3 0.00v
pin8 0.30v
pin9 0.00v
pin10 1.8v

 

[2informaticos]

Post diode mode to ground at pins 2 & 3.
At least R6902 is burnt; need to find why...

 

[Jeffotskie26]

Post diode mode..

ireballed u7000
now i have:
u6903
pin1 4.4v 0.603
pin2 3.3v 0.522
pin3 1.4v 0.363
pin8 3.3v 0.556
pin9 0.4v 0.591
pin10 4.2 0.610

r6902
pin1 & 2 5.0v

still 5v on usb c
no voltage on ppbus_g3h
pp3v3_g3h 1.4v 0.363

 

[2informaticos]

"ireballed u7000"
Why???

Diode mode readings look good.
Change D6902 now...

 

[Jeffotskie26]

Change D6902 now...

problem solved by changing d6902
many thanks @2informaticos ?