[SOLVED]820-2879 with battery doesnot work

[MDY]

- Only with battery dosnot power PPBUS - 11.50V
-Only with AC adapter it power and works. PPBUS - 12.30 (too low? Bad SMC?)
- WIth ac adapter and battery it power and works. PPBUS - 12.30

If I remove battery it works 10 seconds more and shutdown. Already tried a new battery.
ISL 17,18 and 27,18 are 3ohm and 20ohm

 

[aprendiz]

PP3V42 pressent with only battery???

 

[dukefawks]

12.3 means the data bus for battery has an issue. Disconnect the battery indicator and try again. Else it may be a bad ISL or SMC.

 

[MDY]

You mean this? http://www.thebookyard.com/images/mbpu13batind.jpg

PP3V42 I dont know. Tomorrow will check.

 

[dukefawks]

Yes and 3V42 will be fine, it is a battery data bus issue. Disconnect BIL and see if PPBUS is 12,56V without battery. If not it is probably dead ISL/SMC

 

[MDY]

I have only the board on the table and still 12.30V
Next step is to replace ISL6259 then

 

[MDY]

I replaced ISL6259 and now I have 12.26V
Next step is replace SMC?
Balls are 0.30mm?

 

[dukefawks]

Replace SMC. 0.3 or 0.4 both works.

 

[MDY]

Cannot find stencil. Any help to find stencil in ebay o aliexpress?

 

[aprendiz]

http://www.ebay.com/sch/i.html?_fro...LP+stencil.TRS0&_nkw=F2117LP+stencil&_sacat=0

https://es.aliexpress.com/wholesale...=SB_20170111074114&SearchText=F2117LP+stencil

 

[MDY]

I put the balls by hand and already replaced it and I still have 12.28V
So now what I did is new SMC and new ISL. What more could be?

 

[dukefawks]

R5280/81 or corrosion in battery indicator connector, D6950. Board still powers on after the SMC?

 

[MDY]

Yes, board still power. My first smc replacment was ok
When os x load appear a x inside the battery. When disconect the magsafe, board will work 10 seg more.

 

[dukefawks]

Either a bad SMC again or the parts I mentioned. I assume you tried a known good battery and have the BIL disconnected.

 

[MDY]

A known good battery?? I measure 12.28V without battery and this depend from board only, right? So battery is not the problem I underatand as ppbus is not the correct value.

 

[dukefawks]

Well yes, but a bad battery can cause 12.3V too if connected, but without it is indeed a board issue.
Again I mentioned in post #12 the things that can cause this.

 

[MDY]

Aprendiz, thanks for link to buy smc stencil. Do I need more stencils for SMC? There are different, right? How can I fund them on ebay?

 

[aprendiz]

Only 2 different models , here the other.....

http://www.ebay.com/itm/980-YFC-LM4...338023?hash=item2edb09a527:g:L9wAAOSwj0NUj9SC

 

[MDY]

R5280/81 or corrosion in battery indicator connector, D6950. Board still powers on after the SMC?

R5281 was really bad. I didnot have 3.42V on other side. I replace it and now I have 3.42V at SCL and SDA. But still I have 12.28V at PPBUS.

 

[MDY]

I checked and resoldered ISL again and now I have 12.59V at PPBUS and 3.25V at pin14 - ACOK

But now it will not power up. Magesafe is present. I dont know what happend.

SMC_LID - 3.40V

VREG3 and VREG5 at U7200 are present.

PP3V3_S5 - 3.3V present

Cannot see change in PM_PWRBTN_L when press powerbtn.

SMC_ADAPTER_EN - 0.47V