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Old 12-16-2017, 10:07 PM   #13
spintop
Senior Member
 
Join Date: Feb 2011
Posts: 106
Default Re: Lenovo Yoga 2 Pro schematic and boardview

With ac adaptor n battery connected, I am only getting 8v at Vin (see diagram
Page 29). I m expecting 19v here. This is not normal isn't it ?

Btw I have already change the IC pu10.
Dcin at Pin 2 = 19v
Adet pin 3 = 3.5v
Acok pin 14 = 3.3v
Vdd pin 19 = 5.1v
Above voltage looks normal. Ie without switching on the laptop yet.
I also have 3.3v available. So pu6 is working.
But no 5v from pu5. Meaning system is not turn on yet.
At v_chg is 19v.
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