Lenovo Yoga 2 Pro Lenovo nm-a074 schematic and boardview

[sekhar.india]

Re: Lenovo Yoga 2 Pro Lenovo nm-a074 schematic and boardview

Hi, I could able to find the resistor of 150 ohm. I was deceived by the test points near the connector. The PIN1 start from the left side. I am assuming that the keypad matrix, 3V supplied and PIN1 (CAP_LED_N) is the ground for the backlit LED which is controlled by CPU GPIO.

[sekhar.india]

Re: Lenovo Yoga 2 Pro Lenovo nm-a074 schematic and boardview

Hi, I see 3.3V present on the resistor and PIN2. The windows bootup is OK. Did not see the PIN1 (CAP_LED_N) never pulled low. I am not sure, what to check further. Any one have idea, how the keyboard enable work on the motherboard?

[AL._.EX]

Re: Lenovo Yoga 2 Pro Lenovo nm-a074 schematic and boardview

Only boardview *.pdf (no full)