Apple macbook 820-2879 - b smc_pbus_vsense need some help

[justin35]

I have this old c2d board which i run efi asd 3s138 and came up with with a sensor fail vp0r / pbus “sensor is reading above the high limit”

I measured voltage:
R5385 pin 1 -12.56v
R5385 pin 2 - 2.09v

Values:
R3585 is 27.4kohm
R3586 is 5.5kohm

Smc_pbus_vsense is going directly to smc ic, right?

The measured values and voltages are ok for a normal operation sensor, right?
Correct me if i'm wrong.
Broken trace to smc will result in a low reading...
Bad smc?!?

Did any of you encountered this problem?

Thanks!
Ps: does anyone have os asd for this model? Thanks!

[Akinovich]

Re: Apple macbook 820-2879 - b smc_pbus_vsense need some help

Usually the SMC is fine if u can get into ads in my experience, are u measuring to ground or to GND_SMC_AVSS because I find those values weird. Is ur PPBUS 14,65V or 12.6V?

P.s you have a typo in the resistor names they dont match

[justin35]

Re: Apple macbook 820-2879 - b smc_pbus_vsense need some help

I was referring to R5385 and R5386 all the time, sorry for the confusion
I was measuring voltages to the board GND.
Now i measured to GND_SMC_AVSS AND I GET 12,56 and 2,99...

Ppbus_g3h is 12,56v ...

It looks like someone took the bios out for flasing...

Could it be a bios issue? Maybe not ME clean?

Thanks!!

Ps: i don’t have any clean ME efi...

[piernov]

Re: Apple macbook 820-2879 - b smc_pbus_vsense need some help

820-2879 is C2D so no ME region issue.
Is there anything else not working on the board? If not it doesn't matter, it's probably because you are using an 85W Magsafe on a 13" (that's designed to work with 60W, but will work with 85W as well).

[justin35]

Re: Apple macbook 820-2879 - b smc_pbus_vsense need some help

Well.. i only have 45w and 85w adapters
Will try to find one and see if it passes the test.
Thanks for the info, will update soon!

[justin35]

Re: Apple macbook 820-2879 - b smc_pbus_vsense need some help

I tried bagsafe 65w and run the efi test with the same result