Where does SMC_BC_ACOK come from U7000?

[macattack600]

(820-3330). I'm wondering exactly where SMC_BC_ACOK starts at ?

I see on U7000 pin 14 it starts but If I have 0V does a bad SMC prevent it from coming from pin 14 ?

On pin 2 of r5087 I have 3.42 volts

Pin 1 is 0V

[macattack600]

Re: Where does SMC_BC_ACOK come from U7000?

No help on this one ? Anyone?

[dellxps15]

Re: Where does SMC_BC_ACOK come from U7000?

SMC_BC_ACOK comes from u7000. if u7000 is ok it give u that voltage.
check u7000 voltages pin 1,2,3,4
check omh from pin 17 and 18 (one probe on pin 17 other pin 18)and from pin 27 and 28 (one probe on pin 27 and other on pin 28) no battery no psu attached

check for short on f7040 and 4 mosfet across u7000.

[macattack600]

Re: Where does SMC_BC_ACOK come from U7000?

SMC had Burn very hot I replaced it.
Still no green light so I changed u6901 I have green light .
Pin 14 I now have 2.3v
No start no bypass smc either - no orange light with battery connected.

U7000
1 0v
2 17v
3 4.40v
4 3.80v

17 18 is 12ohm. 27 28. 21 ohm.


R7086 (330k OK!). pin 1 0v. pin 2. 6.45?

[macattack600]

Re: Where does SMC_BC_ACOK come from U7000?

I think my problem now is missing PM_SLP_S4_L I have no enable on u7201 can you give me advice?
Is there possibility I have damaged VIA because of burn hole on top of smc?
What should I do to track short from SMC ?
I really hope PCH is not at fault but how?

[macattack600]

Re: Where does SMC_BC_ACOK come from U7000?

pin 110 on SMC is PM_SLP_S4_L I need to know what to test for short I don't believe my problem is the PCH
P5VS3_EN is missing u7201 I have no voltage at the coil L7220

[dellxps15]

Re: Where does SMC_BC_ACOK come from U7000?

report ppbus voltage, 3,3 and 5 volt s5. check resistor u7000 pin 17-18 one is 0omh one is 2.2. g3hot is 3,42 ? voltage on smc_reset_l ?

[macattack600]

Re: Where does SMC_BC_ACOK come from U7000?

I'm afraid there is no hope for this one I get 3.3v but with missing enable on u7201 it will never power on. The enable comes from PCH u1800

[luckydip]

Re: Where does SMC_BC_ACOK come from U7000?

As Dellxps15 said U7000 "17 18 is 12ohm" is high - you need to check the resistors and we need ppbus_g3h - is it 8.6v?

[macattack600]

Re: Where does SMC_BC_ACOK come from U7000?

This is a 820-3330 ppbus_g3h needs to be 12.8v which I have.

17 18 ohm is correct

[luckydip]

Re: Where does SMC_BC_ACOK come from U7000?

This is a 820-3330 ppbus_g3h needs to be 12.8v which I have.

17 18 ohm is correct

Sorry didn' realise it was a 3330

[piernov]

Re: Where does SMC_BC_ACOK come from U7000?

https://logi.wiki/index.php/User:Pie....2C_what_do.3F