LG KM710 Service Manual - Page 78

Slide Up/Down Trouble Shooting

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4. Trouble Shooting 4.9 Slide Up/Down Trouble Shooting Slide Operation scheme is shown below. SLIDE SWITCH VRIO C102 1u PGND 5 BU52031NVX U100 4 3 VDD NC 1 OUT GND 2 SLIDE C103 0.01u Block Diagram (Folder On/Off) Slide Magnet Hall Effect Switch (U100) High Low 1.8 V 0 V DBB(U103) GPIO 57 (R10 pin) 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 L : Down (Magnetized) => Slide Down H : Up (Not magnetized) => Slide Up Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes - 79 - LGE Internal Use Only

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4. Trouble Shooting
4.9 Slide Up/Down Trouble Shooting
Slide Operation scheme is shown below.
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.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
SLIDE SWITCH
1u
C102
1
OUT
PGND
5
VDD
4
U100
BU52031NVX
GND
2
NC
3
0.01u
C103
VRIO
SLIDE
Slide Magnet
Hall Effect Switch
(U100)
High
Low
DBB(U103)
GPIO 57
(R10 pin)
1.8 V
0 V
Slide Signal Status
L : Down (Magnetized) =>
Slide Down
H : Up (Not magnetized) => Slide Up
Block Diagram (Folder On/Off)