Rep: 1
1
So this system has 17.2v on PP18V5_G3H with 0 resistance to ground.
Removed R6905.
Still shorted
R7062 gets 7v instead of those 17v. Removed and board still shorted.
Fuse on that line is ok..
Any ideas?
Esta é uma boa pergunta?
Rep: 478,9 mil
35
329
970
Did this system have a liquid spill?
The MagSafe LED is driven by SMC, I’m not sure I follow why you are focused on 3.425V G3Hot.
I would go back to PPVBAT_G3H_CHGR_OUT Q7050 si7137dp as I’m suspecting that’s your issue.
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Stopped turning on 2 years after water spill.
I had 0v everywhere, i replaced r6905, c6990 and c6999 now i have 3.6v and 17.2v on both sides of r6905 and then i found that on d6905 thats why i thought problem was there. Q7050 and that area looks alright.
Q7050
All pins have 1v less pin 4 which has 0.22v.
Thats it?
I would start there.
So that comes from CHGR_BGATE in U7000.
U7000:
DCIN 0v
ACIN 4v
VDD 0v
PP3V42 G3H 1,7v
Btw thanks for your help man
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2 comentários
@king_jorg - Maybe you want to head over to Louis Rossmann's YouTube channel where here gets into the logic board repairs.
por Dan
@danj yes Sr. I'm watching all of them
por Jorge