820-02098 stop working

[bartech]

no water damage just stop working . on all usb i got 5.23V 0.01A
f5200-12,29v
ppdcin aon-5,17v
ppv charg vdd- 5.19v
pp1v8-s2 - 0v

 

[2informaticos]

What about 3V8_AON?

 

[bartech]

3v8_aon-5.18v

 

[2informaticos]

Are you sure???
That is not good at all.
Please, check again at C5890.

 

[bartech]

c5890 - 2,18v ( sorry )

 

[2informaticos]

That's also bad.
Check diode mode there.

 

[bartech]

c5890 rising till 1889...

 

[2informaticos]

With red probe at ground???

 

[bartech]

347

 

[2informaticos]

Diode mode reading doesn't look low.
Try changing U5700.
First, inspect all surrounding components.

 

[bartech]

there is short on line P3v8aon_vsns_xw_n / not on u5700 , i take out r5871 and short is on leg 1 . it should be like that ?

 

[2informaticos]

What did you expect???
That point is connected to ground.
Use logic when you interpret readings!

 

[bartech]

u5700 changed and its the same on usb 5.23v 0,2A-0,3A

 

[2informaticos]

Do you get correct 3V8_AON voltage now?

 

[bartech]

3v8_aon - 3,8v

 

[2informaticos]

Is the machine recognized in DFU mode?

 

[bartech]

i will check tommorow. thx

 

[bartech]

no its not get in dfu, but when i open it its not taking any power , when its close it take power so i disconect jr200 and then it take powre whit open lcd but dont get to dfu i try many times

 

[2informaticos]

Be aware of DFU port (left back); is not the same as for T2 machines.

 

[bartech]

i know, its usb in the middle, between magsafe and another usbc