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820-00164 ppbus_g3h = 0.918v
- Thread starter Aivaras
- Start date
"PPBUS_G3H = 0.918V"
Is that valid for charger only?
If fan spins with battery, means PPBUS_G3H is not shorted.
Do you get video, chime,or USB activity on battery mode?
Any history available, liquid spill?
Post exact resistance (onboard, ohm mode), for R7012, R7180/81 and R7185/86.
Also check resistance between pins 17/18 and 27/28 for U7100.
Do you get 3V42 on charger mode (no battery)?
Do you get Magsafe light?
Are you using original Magsafe 2 (NOT 1-->2 adapter)?
You may also post some voltages for U7100; pins 2, 3, 9, 12, 13, 15, 17, 27.
Is that valid for charger only?
If fan spins with battery, means PPBUS_G3H is not shorted.
Do you get video, chime,or USB activity on battery mode?
Any history available, liquid spill?
Post exact resistance (onboard, ohm mode), for R7012, R7180/81 and R7185/86.
Also check resistance between pins 17/18 and 27/28 for U7100.
Do you get 3V42 on charger mode (no battery)?
Do you get Magsafe light?
Are you using original Magsafe 2 (NOT 1-->2 adapter)?
You may also post some voltages for U7100; pins 2, 3, 9, 12, 13, 15, 17, 27.
Video is there(on battery mode).
Using genuine magsafe 2
No liquid,
i get 3v42 on charger mode
r7012 = 67.5k
R7180 = 99.5k
R7181 = 61.5k
r7185 = 468k
r7186 = 330.2k
u7100 17/18 2.8ohm, 27/28 20.6
7100 pin 2 = 16.37v
pin 3 = 4.38v
pin 9 = 0.032v
pin 12 = 3.418v
pin 13 = 3.381v
pin 15 = 0.05v
pin 17 = 0.908v
pin 27 = 0.920v
Using genuine magsafe 2
No liquid,
i get 3v42 on charger mode
r7012 = 67.5k
R7180 = 99.5k
R7181 = 61.5k
r7185 = 468k
r7186 = 330.2k
u7100 17/18 2.8ohm, 27/28 20.6
7100 pin 2 = 16.37v
pin 3 = 4.38v
pin 9 = 0.032v
pin 12 = 3.418v
pin 13 = 3.381v
pin 15 = 0.05v
pin 17 = 0.908v
pin 27 = 0.920v
"pin 27 = 0.920v"
So Q7180 is blocked, or bad...
Do you get 0V at pin 1/U7100?
If not, change ISL6259.
If yes, check traces to Q7180 and/or change it.
So Q7180 is blocked, or bad...
Do you get 0V at pin 1/U7100?
If not, change ISL6259.
If yes, check traces to Q7180 and/or change it.