Slide Up/Down Trouble Shooting - LG KM710 Service Manual

4.9 Slide Up/Down Trouble Shooting

Slide Operation scheme is shown below.
SLIDE SWITCH
VRIO
BU52031NVX
4
VDD
3
NC
C102
1u
Slide Magnet
4.9.1 Slide Operation(ON/OFF)
- There is a magnet to detect the slide status, opened or closed.
- If a magnet is down to the hall-effect switch(U100), the voltage at pin 1 of U100 goes to 0V.
Otherwise, 1.8V
- This Slide signal is delivered to DBB, and the status of Slide is reported.
Slide Signal Status
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
U100
1
OUT SLIDE
2
GND
C103
0.01u
Block Diagram (Folder On/Off)
Hall Effect Switch
(U100)
High
L : Down (Magnetized) => Slide Down
H : Up (Not magnetized) => Slide Up
1.8 V
0 V
Low
- 79 -
4. Trouble Shooting
DBB(U103)
GPIO 57
(R10 pin)
LGE Internal Use Only