LG F1200 Service Manual page 56

(9) Folder On/Off and Trouble
Block Diagram (Folder On/Off)
V_IO
Hall Effect Switch
R300
51K
C300
0.1u
A3212EEH U300
6 1
VDD OUTPUT
5 2
NC2 NC1
4
GND2
7 3
PGND GND1
Folder Conditions
Folder On Condition
Folder Off Condition
• Folder Operation (ON/OFF)
- There is a magnet to detect the folder status, opened or closed.
- If a magnet is close to the hall-effect switch (U300) the voltage at pin 1 of U300 goes to 0V.
Otherwise, 2.8V
- If a folder signal (Folder) goes to 0V, RPWON2 signal goes to 2.8V. Otherwise, 0V.
- This Folder signal is delivered to DBB, and the status of folder is reported.
FOLDER
ON_OFF
TDO_ABB
TDO_ARM
1
TCK
TMS
FOLDER
C301
0.1u
K2
J4
E1
L9
M10
J1
1
High
Low
• Folder1 Signal Status
- L : Close (Magnetized) ➝ Folder OFF
- H : Open (Not magnetized) ➝ Folder ON
- 55 -
2
R201
15K
R202
100K
R204
G
10K
C201
27p
3
TDR
TEN
CK13M
ABB
INT1_TEST1
INT2_TEST2
2
Low
High
4. TROUBLE SHOOTING
R209
R208
R205
10K
10K
10K
S
SI1304DL
Q201
D
J11
ADIN1
J12
ADIN2
J10
ADIN3
K11
ADIN4
K12
ADIN5
D9
DAC
3
Low
High