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No keyboard Trackpad MBP 820-2915-b  

 

Brooke Johnson
iExpert United States
(@iphonegigalo)
Active Tech Registered
Joined:4 months  ago
Posts: 9
16/11/2017 05:47  

Water damaged. Fixed USB but can't get trackpad and keyboard.

Tested voltage at keyboard connector

 PP3V3_S4  = 0.748

PP3V42_G3H = 0.0

Does PP3v42 come from PSOC USB Controller U5701?

Edited: 3 months  ago

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Brooke Johnson
iExpert United States
(@iphonegigalo)
Active Tech Registered
Joined:4 months  ago
Posts: 9
16/11/2017 06:14  

I'm getting on track pad

PP18V5_S4 = 0.0

So I'm looking for the chip that supplies 

PP18v5_s4 , PP3v3_s4, PP3V42_G3H


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Brooke Johnson
iExpert United States
(@iphonegigalo)
Active Tech Registered
Joined:4 months  ago
Posts: 9
16/11/2017 07:24  

U5805 has 0.0 on pin 4  so PP18V5_s4 = 0.0

 


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iTesla
iOracle Moldova
(@idea)
SUPPORT Admin
Joined:5 years  ago
Posts: 7213
16/11/2017 15:13  

Hi

This IC U6990 output PP3V42_G3H test for short the missing or low voltage lines but also test resistors on that page.

I found board layout and updated in a folder check Macbook Schematics google drive folder again.

Do not wait that i feed you with the tea spoon, the site is full of info have patience searching and reading because this is the great way to learn from others.


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