For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.
Q7180:
1/2 14.755V
3 5.998V
4/5 17.235V
6 14.108V
7-10 14.773V
I have also tried to measure current sensing circuits and R7150/1/2 look good. R7120 looks also good, but R7121/2 have strange readings. Like 5.5kOhm and 324 kOhm. Definitely not 10 Ohm.
Also, the fuse is still...
R7180 100.4 kOhm
R7181 61.4 kOhm
R7185 471.1 kOhm
R7186 331.7 kOhm
Resitors look good according to schematics.
I made also D-S diode test on 7/8/9/10 -> 1/2 and 7/8/9/10 -> 4/5 on Q7180 with result around 0,52V. Opposite OL.
All other D-S-G combinations were OL with beeper.
The battery is removed and also the F7140 is still removed.
U7100:
1 0.0242V
2 13.3V
3 3.87V
9 0.033V
12 3.416V
13 3.383V
14 3.383V
15 0.0705V
17 3.215-3.268V oscilating
19 4.988V
20 4.742V
27 0.745-0.750V fluctuating
Also, the current drawn is little...
The C7140 voltage is slowly oscilating between 3.08 - 3.30V after F7140 removal.
Just to be clear, battery is not connected.
Although, the orange light is on.
Appologies for my mistake. So the diode to the ground with red on the ground. I have used the beeper.
L7320 0.0233V
L7310 0.0233V
L7430 0.238V
L7630 0.177V
L7130 0.153V
L3095 0.533V
L7701 0.431V
L7560 0.370V
L7520 0.440V
And the PPBUS_G3H is realy 3.09V.
Thank you
Hello,
PP3V3_SUS has nothig, 0.003 mV respectively.
U7501:
23 3.090 V
22 3.085 V
12 3.420 V
13 1.997 V
29 3.037 V
21 3.420 V
Coils to ground both ends (value after settling down):
L7320 14ohms beep
L7310 14ohms beep
L7430 ol short capacity...
PP3V3_S5 is dead zero. Not beeping to the ground, only short capacity beep.
PP3V3_SUS is, if I understand the boardview correctly, available from the other side. I will be able to disassemble the computer in few days.
Thanks
Uli
Hello,
my daughter's MB ceased to charge after she twisted the cable from a charger that it got shorted which fired a house breaker. The computer worked until the battery went dead.
The orange light is on, but it draws only around 65 mA.
The computer cannot be started with or without a...