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820-2883 no green light

Y

Yoel Ren

Member
after replacing d7005, Macbook boot up fine, but does not (idk see battery / charge the battery ), it say not charging, unplugging magsafe will result in macbook turned off immediately
Looks like not u7000 shunt resistor problem because resistance between pin 17/18 : 2.8 ohm 27/28 is 20.5 ohm
Does any fet cause this? Because i have messed up with the q7050, q7021, and q7020 before
 
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Y

Yoel Ren

Member
Ppbus 1.3v with battery only connected
I have tried reballing smc, and i see that ball 34 is gone ( lpc_ad, but i don think it matters..)
 
Y

Yoel Ren

Member
Okay idk why, but suddenly d6905 blown, i replaced d6905, plug it original magsafe.. no green light, plugged in fake charger, and d6905 blown again..
 
2informaticos

2informaticos

Administrator
Staff member
Why did you touch SMC?
And what you did to burn D6905???

If you find a burnt piece, don't you want to find the reason, before applying power?

Now check diode mode at C6990/99.
 
Y

Yoel Ren

Member
ppvin_g3h_p3v42g3h is shorted, internal shorted because i already lift all caps and component of it, so i construct new path , you can see the picture, now it give a dim green light with blinking yellow light, i have 16.5v on fuse
Im pretty confident with my smc reballing skill.., should be no problem..
Yeah my bad about finding problem before replacing every burn thing..
 
Y

Yoel Ren

Member
Well i miss pin 6 of u6990 which doesnt give me green light.., now i have steady green light with original magsafe.., back to not seeing battery problem..
 
2informaticos

2informaticos

Administrator
Staff member
Post exact PPBUS_G3H voltage.
Also voltage and diode mode for SCL/SDA lines oif battery bus.
 
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Y

Yoel Ren

Member
Okay the fan spinning but no caps lock or backlight / image or anything, and ppbus is 8.18v with magsafe only connected..
smc_reset_l 3.4v, so either isl / smc right ?
 
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Y

Yoel Ren

Member
Voltage 3.4v on both, steady
Diode mode very similar 0.444 same value both
Tried another smc, ppbus is 8.2v , board still can turn on, it can see battery, but not charging and can’t run off battery
Ppbus with battery only connected is 1.3-1.4v
 
Y

Yoel Ren

Member
After replacing q7050, macbook now run off battery and showing percentage, but still not charging, even if restaitance between 17/18 and 27/28 is good, can the isl still be bad ?
 
2informaticos

2informaticos

Administrator
Staff member
8.2V is not correct PPBUS_G3H (without battery).
As voltages and diode mode readings are good on battery bus, then should be SMC, or U7000 problem.
I hope you soldered ISL6258...
 
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