Re: Macbook A1502 820-4924-A only smc bypass (Schematics measures and boardview inclu
First, thanks for your time to read and help me.
YES, the charger used for the last measures is an APPLE 60Watts MagSafe 2 OEM and genuine.
If I want to fix this board, I need to respect the steps of your guide. So, I will not lie.
Reading a lot of threads and posts about Macbooks boards, I understand that is absolutely necessary. For this reason, I had to search a 60w Apple MagSafe and come here again.
Measures with Apple MagSafe 2...
luel
Member
Last Activity: 03-11-2021, 12:46 PM
Joined: 02-13-2021
Location: Buenos Aires
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Re: Macbook A1502 820-4924-A only smc bypass (Schematics measures and boardview inclu
PM_BATLOW_L
TP1 --> peak on 0.0875 then goes down to 0.035v (stable at 0.035v)
R1410 pin 2 --> PM_BATLOW_L --> peak on 0.0875v then goes down to 0.035v (stable at 0.035v)
R1410 pin 1 --> PP3V3_S5 --> 3.38v
Q3000 pin 1 --> PP3V3_S4_TBT --> 0v
Q3000 pin 2 --> TBT_BATLOW_L --> 0v
Q3000 pin 3 --> PM_BATLOW_L --> peak on 0.0875v then goes down to 0.035v (stable at 0.035v)Leave a comment:
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Re: Macbook A1502 820-4924-A only smc bypass (Schematics measures and boardview inclu
Today I tried with another original magsafe 2 60w. Only boot in SMC bypass, and Starts without battery on SMC bypass. Fast orange light, then green light (for about 2 seconds), then orange light and stays here.
Measures:
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PPBUS_G3H - 12.9v
R3080 pin 1 --> PPBUS_G3H 12.9v
R3080 pin 2 --> TBTBST_PWREN_DIV_L 8.4v
C3080 pin 1 --> PPBUS_G3H 12.9v
C3080 pin 2...Leave a comment:
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Re: Macbook A1502 820-4924-A only smc bypass (Schematics measures and boardview inclu
Its not the recommended charger for this laptop, I know... But is the charger I used for two years until the liquid damage.
It should reach the function as well... Or not? The charger is not the problem here, damage is for liquid!Leave a comment:
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Re: Macbook A1502 820-4924-A only smc bypass (Schematics measures and boardview inclu
What do you mean with this?
"If yes, what is the current draw of the board?"
Its to measure consumption? Inject voltage? Or just replace the magsafe?Leave a comment:
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Re: Macbook A1502 820-4924-A only smc bypass (Schematics measures and boardview inclu
If I put the board on the case, whit battery (completely discharged) and magsafe, screen shows charging but never boots up. If I try to power on, shows charging battery.
Just boot in SMC bypass, without recognize the battery, load OS and stay ON. All works. That make me think was the problem can be fixed...
I need to replace a knob in the power supply to use in this. If I can solve without external power supply will be good
...
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Re: Macbook A1502 820-4924-A only smc bypass (Schematics measures and boardview inclu
A picture of the SMD Tester...Leave a comment:
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Re: Macbook A1502 820-4924-A only smc bypass (Schematics measures and boardview inclu
Uploaded a capture of the c1031
Do you wanna that ? or a general picture of the board?
Has been wet on the upside near the battery and otherside also.
CPU and RAM were safe, I guess...
When I see that, case open, disconnect battery and cry......Leave a comment:
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Re: Macbook A1502 820-4924-A only smc bypass (Schematics measures and boardview inclu
PP3V42_G3H
Using smd mini tester in resistance mode, pin 1 on c1950 shows 5.19 kohms
Tester inverted, pin 1 on c1950 shows 82.4 kohms
Using needle tester it shows 1
...
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Re: Macbook A1502 820-4924-A only smc bypass (Schematics measures and boardview inclu
Sorry, all measures are wrong because im using a needle tester for voltages resistances and consumptions. Calibration error.
Here we go again:
ppbus_g3h - 12.90v
PP3V42_G3H - 3.42v
PPVRTC_G3H - 3.4v
PP5V_S5 - 5.18v
PP5V_S3 - 0v
PP5V_S0 - 0v
SMC_LID - 2.22v
PP3V3_S5 - 3.4v
Double checked, my apologies...Leave a comment:
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Macbook A1502 820-4924-A only smc bypass (Schematics measures and boardview included)
I have a Macbook pro 2015 model A1502
Board 820-4924-A
Liquid damage, not much corrotion, cleaned with consciousness and isopropyl
Only boot in SMC Bypass (battery, charger, trackpad and LCD connected)
In this mode booting is slow, fan is full ON, but works fine and the mac stays on.
Dont recognize the battery, AND no boot in SMC bypass if the battery is not connected
My charger is an original apple magsafe 45w 14.85v 3.05a. (I dont have any other, but is the charger used in that macbook... -
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I'm wonkel, I need some help to Learn how to find shorts and bad caps in some boards. Thanks for the schematics!
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