k55VM - messing with BQ24725

[ktmmotocross]

Hello
Dont have anything to repair so im messing with K55Vm booard that not work at all

ACOK is pulling down from BQic because i removed all components from this rail and still pulling down

I make measures on picture. no short, but pins 7-10 is getting short pulses of voltage. in suspecting IT KBC but dont have schematic or boardview to check more on it before i remove it. any hints?

[SMDFlea]

Re: k55VM - messing with BQ24725

Heres a rev 2.2 boardview https://www.badcaps.net/forum/attach...0&d=1478116649

Check +3V

[ktmmotocross]

Re: k55VM - messing with BQ24725

no voltage ?

[ktmmotocross]

Re: k55VM - messing with BQ24725

ok. i measured all mosfets for short and found nothing so i jumped that two mosfets and board and working.

and now i have working ACOK and all others signals from BQ

try to replace that two mosfets

[ktmmotocross]

Re: k55VM - messing with BQ24725

removed, tested with multimeter and was ok, but replaced to be sure and still the same story.

BQ replaced two times and still the same

i see that i have not the whole board. on my board is BIG slot i think for add board and in BV i see there is DOCK so there may be culprit.

not detecting dock board so maybe KBC pulling EC_SMB_CLK and EC_SMB_DA signals down



If anybody know more plase post it