820-00928 - 20v - 0a

[2informaticos]

"I have 20v on the C7050"
Are you sure?
That's really bad.

Check Q7030/40 for internal short.

"AUX_DET - 0"
This bad also.
Check diode mode first.

 

[Palhano]

Sorry! There are so many measurements that I got confused in the description.

On the C7050 I have 12.6v. I checked the AUX_DET again, I have 4v. I may have gotten confused.

I checked the Q7030/40 in diode mode, on each pin, I found no changes.

 

[2informaticos]

What's PPBUS_G3H voltage, with fuses soldered on their place?

 

[Palhano]

PPBUS_G3H is 12.6v

 

[2informaticos]

Then U7000 area is OK.

 

[Palhano]

Do you suggest any other tests?

 

[2informaticos]

Do you get 3V3_S5/SUS?

 

[Palhano]

Yes! I also get the PP5v_S5

 

[Palhano]

Something changed in the Q7040, pin 12 in diode mode had 0.830, I found it strange that now it has 0.480, then I discovered that they are shorting with pins 11 and 10. I will order the components to change.

 

[Palhano]

I agree that the PPBus with 12.5v is perfect. But as I mentioned the Q7030/40 and when I checked it I noticed a difference, I found it strange.

Any other suggestions?

 

[Palhano]

I tested PM_PWRBTN_L when I activate SMC_ONOFF_L, it pulses to 0.3v.

But I have no pulse in PM_SLP_S4_L, it is always at zero.

Not a good sign, right?

 

[2informaticos]

Check the basic PCH's signals and its RTC signals.

 

[Palhano]

Some measurements are not good! =/

PM_DSW_PWRGD - 3.4v
PM_BATLOW_L - 0.7v
PCH_INTRUDER_L - 1.4v
PCH_SRTCRST_L - 3v
RTC_RESET_L - 3v

 

[2informaticos]

"PCH_INTRUDER_L - 1.4v"
This point to bad PCH.
Force the signal with 100K-10K, instead of R1201.

 

[Palhano]

With the 100k resistor, I have 2.8v at PCH_INTRUDER_L. But it's still dead. and PM_BATLOW_L - 0.7v

 

[2informaticos]

Did you try another 87W charger?

 

[Palhano]

Yes, I tried up to 96w!

 

[2informaticos]

PM_BATLOW_L must stay high.
Diode mode to ground?

Check if R1212 is good.