A1502 820-4924-a

[iFix]

HI Guys. Needs some advice here. Liquid damaged board which was working until i cleaned it and rebuild the affected circuit. The damage was on and near U7600. Now i have a green light and orange when battery plugged in and on power supply pulls 0.020amps.
Thanks

 

[2informaticos]

Broken traces I suppose.
Check continuity from that area with the rest of board; some traces go inside PCB.
Also be sure to have good resistors there.

 

[iFix]

Cannot find anything wrong with traces. Resistors measure is fine. Around U7600 i only have voltage on C7622 pin 1 and on q7630 8-9pin...

 

[2informaticos]

Do you get 5V at pin 12/U7600?

 

[iFix]

Nothing on pin 12/U7600. Measuring on U7501 i get:
S5_PWR_EN 3.42v
PP5V_S5 5v
S5_PWRGD 3.4v
P5VP3V3_VREF2 2v
SMC_PM_G2_EN 3.4v

 

[2informaticos]

If you have 5V at L7520, then you have a broken trace...

 

[iFix]

Nothing on L7520... 0

 

[iFix]

HI 2informaticos. Solved by replacing the U7200 don't really know what happened but this board was a mess. Had another one in the meantime liquid damage around u7200 and solved it the same.

Thanks for you help much appreciated