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Hi, I have a 00875 thats had liquid damage over the U7650 side of the board.
After going through the UC, the laptop started from the battery and got into the OS but I walked away and came back to it turned off. Not sure if the battery is drained or something else.
I don't have a spare battery...
Sorry, thought I was just looking for damaged traces, liquid etc..
U6901 Pin 1/2 SMC_BC_ACOK = 0v, Pin 3 GND = 0.0v, Pin 4 SMC_BC_ACOK = 0.0v, Pin 5 PP3V42_G3H = 3.452v
I'll check voltages on U6900 now too
2informaticos Changing the DCIN didn't make any differences. Checked around U6900/01 under the microscope and it all looks perfect unfortunately.
Just to be clear. When PPBUS_G3H is below 11.84v (usually around 11-11.4v when just on battery) the magsafe light doesn't come on and the battery...
JohnB8812 Exact voltage on PPBUS_G3H with the battery removed, just 85w charger and the MacBook turned both off and on is 12.48v-12.49v
On ISL6259 (U7000) resistance between 17/18 is 2.8 - between 27/28 is 20 ohms which both seem fine I think.
2informaticos I'm checking U6900/U6901 now for...
I have an 820-3115-B with a intermittent fault.
It always turns on with a charged battery but doesn't always charge the battery.
When it doesn't charge, theres no green or orange light.
When it does charge, it shows orange light as normal.
I've noticed that if its in a charging kind of mood...
SMC bypass on these... is that with the board back in and battery connected or without the battery? Hold power button for 10 seconds and keep holding for another 10 seconds while plugging in the power lead right?
U8220 - PP3v3_sus out is 3.3v constant
U8230 - PP5v_S0 is pulsing
U8200 - PP3v3_S4 is pulsing
U8210 - PP3v3_s0 is pulsing
U8250 - PP1v8_s3 is pulsing
U8240 - PP1v2_s0sw is pulsing
U8270 - PP1v_s3 / sus is 1v constant
U8206 - PP1v_s0sw 1v constant
Are these what you mean?