820-3476 Only charges with 85w power adapter

No-Clean

Member
Clean board, initially the 60W charger would not work at all even with battery disconnected, after replacing;
U7100
Q7180
U7101
U7000
U7090
Q7010
Board now boots each time with 60w adapter but when the battery is connected there is no power or even any light on charger, at that point PP18V5_DCIN_FUSE is only 1.5V

With 85w adapter all works fine.
 

2informaticos

Administrator
Staff member
Charger detects leakage and gets protected.
Inspect for corrosion on input side; pay atention to R7012 and D7010.
 

No-Clean

Member
D7010 was already replaced with the other components mentioned before.
R7012 measures fine and there is no corrosion on that area.
New battery same problem.
 

2informaticos

Administrator
Staff member
In working state (with 85W charger), post exact voltage for PPDCIN_G3H, DCIN_ISOL_GATE, DCIN_ISOL_BATE_R and PPDCIN_G3H_ISOL.
 

No-Clean

Member
Board in MacBook case with everything connected including battery using 85W charger.

PPDCIN_G3H 16V
DCIN_ISOL_GATE 6.78V
DCIN_ISOL_GATE_R 6.78V
PPDCIN_G3H_ISOL 16V
 

No-Clean

Member
16.29V and it is 85W magsafe 2 original purchased at the Apple Store with original cable still installed, not sure why the difference.

MacOS also shows it as 85W under system configuration/power
 
Last edited:

No-Clean

Member
Just did 5 seconds ago, same problem, now with 65W charger I am back at the same behavior as the start with battery wont start at all, without battery board starts sometimes after connecting and disconnecting charger multiple times.
 

No-Clean

Member
Right now with board alone and battery connected and 65W adapter board will not boot and no light on charger at any point.
Board alone and 65W charger board sometimes starts up.
 

No-Clean

Member
After a few seconds CHGR_AMON stayed at 1.2V and CHGR_BMON 0.05V with 85W charger and battery connected with 65W charger and battery 0V and 0.06V.
 
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