Hi all, i have a problem with mentioned board. I know that there was a liquid damage on U6600 and U6610 and there was short on 3.3V i have 2.8V and Q6100 was overheating. I change all of mention components and some aditional but no luck. After detail cleaning a have manage to get stable 3.3V and 5V. Now when i connect charger i have only short power LED blink and thats all. And voltage on Q6100 is about 0.87V (lower than needed). I tried to change Q6000, Q6001, U6000, U6200 but is the same. Any hint, what to try?
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Hp 840 g1 6050a2560201-mb-a03
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Re: Hp 840 g1 6050a2560201-mb-a03
Start with sheet 5 of the schematic = charger IC @ U6000.
Review the DCIN mosfets @ Q6010 & Q6011. Often the 2nd mosfet gets damaged.
Confirm the voltages on each of these mosfets (source ; drain; gate).
A good idea to also, with great care, measure the voltages on each pin of U6000 charger IC.
Post your measurements.
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Re: Hp 840 g1 6050a2560201-mb-a03
Thanks in advanced. This is measurments:
Q6010 D - 19.47 S - 19.47 G - 6,12
Q6011 D - 19.47 S - 19.47 G - 25.6
And this is the measurment on "good" board (have problem with 3.3 and 5 rails) But have good voltage on Q6100 ~ 1.3V
Q6010 D - 19.47 S - 19.47 G - 6,12
Q6011 D - 19.47 S - 19.47 G - 25.6
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