LG KU730 Service Manual page 56

3.11.6 Folder ON/OFF Operation
There is a magnet to detect the folder status, opened or closed.
If a magnet is close to the hall-effect switch, the voltage at pin1 of U600 goes to 0V. Otherwise, 2.6V.
This folder signal is delivered to MSM6275 GPIO43.
VREG_MSMP_2.7V
FOLDER_DETECT
Figure. Schematic of Folder ON/OFF detection circuit on keypad
FOLDER_DETECT
R601
62
C600
0.1u
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3. TECHNICAL BRIEF
U600 A3212EEH-T
1 6
OUTPUT VDD
2 5
NC1 NC2
4
GND2
3 7
GND1 PGND