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820-00928 - 20v - 0a

Palhano

Palhano

Member
The logic board is perfect, no oxidation.

Using the original 96w charger, I have 20v - 0a on the 4 ports without the battery. With the battery connected, it gets 20a - 3a, but it doesn't turn on (probably charging the battery).

I checked all the CD3215s (even with 20v, I thought it was better to check)

I removed the F7000/01 and I have 20v on the C7050. Diode mode - C7020 - 4.7 ohms - C7023 - 4 ohms

U7000
P_IN - 20v
AUX_DET - 0
SMC_RST_IN - 0
VDDA - 5v
VDDP - 5v
EN_MVR - 5v
SMC_RST* - 3.4
AUX_OK - 3.4
AMON -0
BMON - 0

I try to change the U7000?
 
2informaticos

2informaticos

Administrator
Staff member
"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

Palhano

Member
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.
 
Palhano

Palhano

Member
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

Palhano

Member
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

Palhano

Member
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?
 
Palhano

Palhano

Member
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
 
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