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Old 01-28-2017, 09:35 AM   #1
Ryanleng
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Default 820-00138-a A1398

Good Morning. (Where I am anyway.) Have Macbook Air 1398 with 820-00138-A with liquid damage. Does anyone have schematic and boardview for this board. Thanks in advance for any help.
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Old 06-26-2017, 06:55 PM   #2
the___beau
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Default Re: 820-00138-a A1398

I've got a schematic, no boardview though.
Attached Files
File Type: pdf A1398 820-00138 051-00330.pdf (2.92 MB, 821 views)
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Old 07-07-2017, 02:41 PM   #3
dimpy_123
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Default Re: 820-00138-a A1398

does any one have Boardview for820-00138
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Old 08-01-2017, 10:43 AM   #4
simplylcd
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Default Re: 820-00138-a A1398

I have a MacBook Pro Mid 2015 A1398 , I have the audio jack stuck in optical mode , I replaced the jack and now the stuck in optical mode is gone. The MacBook used to chime when powered on , but now does not.



But the sound still does not work from internal speaker or jack , if I connected Bluetooth headphones the sound works , if I plug a USB-Audio adapter the sound works.



I have checked the following :


Ok was checking voltages at C6600/C6601 = 3.3v and pin 10 audio jack same , then checked back to R6322 missing board revision / R6324/R6325/C6212 all 3.3v checked PP3V3_SO_AUDIO_ANALOG =3.3v checked C6302 =1.5v fed from U6200 checked pins 1-6 as follows 1=1.5v 2=0v 3=1.2v 4=3.3v 5=0v 6=4.9v pins 1 and 3 should be 4.5v , checked capacitor C6203 connected to pin 3 and both sides shorted so removed , need to check R6200 and C6200 I think it should be 4.5v and not 3.3v I think going to pin 4 u6200


Checked all components now L6201/C6213/C6214/C6212 = 3.3v

C6216/C6217/C6218/L6201 =0v should be 3.3v traced back to audio chip (u6201) and no vref should be 4.5v but output =0v does it mean the audio chip u6201 is faulty and need replacing or u6200 that powers the chip if I feed 4.5v direct to c6213 to put 4.5v there will it damage anything ???



I have found that the power chip U6200 is not output the correct 4.5v , traced back to Pin 10 of the sound chip and no voltage out.



Is it the Cirrus Logic power amp IC or some thing else, I can only find 1 fuse on the board are there any more.



Also no the display has failed when I was checking voltages back to the LCD connector 5v feed.



It is a A1398 , 820-00138-A logic board MBP Mid 2015.



Any help would be great
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Old 02-06-2018, 12:47 PM   #5
nhattamlaptop
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Default Re: 820-00138-a A1398

Quote:
Originally Posted by the___beau View Post
i've got a schematic, no boardview though.
i'm need boardview, please up thanks
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Old 02-06-2018, 02:00 PM   #6
angel-boy
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Default Re: 820-00138-a A1398

try this
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File Type: zip boardview .zip (156.3 KB, 760 views)
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Old 03-05-2018, 09:02 AM   #7
freakazorzz
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Default Re: 820-00138-a A1398

I'm working on a 820-00138-A board that was liquid damaged.
It's booting but goes into panic-mode (loud fans) and the cpu and ram is getting very hot.
I have 19,6V on PPBUS_G3H, this is too much, it should be 12v.

Does anyone has any idea what I can do next?

Thank you
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Old 03-05-2018, 03:08 PM   #8
piernov
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Default Re: 820-00138-a A1398

Shorted high side MOSFET for the PPBUS_G3H buck converter, so you get the DC in voltage on PPBUS_G3H.
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Old 11-16-2018, 02:36 AM   #9
silambarasan899
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Default Re: 820-00138-a A1398

Thank you all
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Old 11-25-2018, 06:42 PM   #10
raileanu
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Default Re: 820-00138-a A1398

Thanks.
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Old 11-27-2018, 04:41 AM   #11
raileanu
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Default Re: 820-00138-a A1398

Thanks but the board view you provide is a bit different than 820-00138-A board I have and the tracks doesn't match, in special ti the SSD control IC's side. Does anyone has the correct brd for this board please. Thanks in advance.
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