LG KT610, Service Manual

Page: 148 / 234

- 149 -
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.18 Bluetooth trouble
Bluetooth control signals are generated by STN8810.
Bluetooth Chip (STLC2500) and peripherals are mounted in Sub Board which is connected by B-to-B
connector.
Those signal’s path are : STN8810
→
AP_VDD_IO_1.8V and AP_VDD_IO_2.7V is asserted
→
CLK32K is asserted
→
Bluetooth ON
→
BT_RESETN is High
→
CLK_REQ_OUT_1 is High
→
REF_CLK_IN is asserted
→
transmit/receive data/control through UART
→
transmit/receive voice
data through PCM I/F AP_VDD_IO_2.7V is same with AP_VDD_BT_2.7V which are just connected
through 0 ohm resistor
E L U D O M H T O O T E U L B
C1
18
1u 1u
C1
17
220n
C1
10 C1
15
1u 1u
C109
C1
1
3
220n
p 0 1 3 2 1 C
p 5 . 1
1 0 1 L
V 8 . 1 _ O I _ D D V _ P A
220n
C1
16
V 7 . 2 _ T B _ D D V _ P A
C1
12
220n
V 7 . 2 _ T B _ D D V _ P A
D N G
2
3
T U O
N E P O _ I R T
1
4
D D V
0 0 S R V E E 0 0 0 2 9 1 M 3 C S C 0 0 1 X
z H M 2 . 9 1
0 0 1 L F
1 C 3 4 0 7 - T B 0 5 4 2 1 2 A E D
1 P B
5
2 P B
2 4
C D _ P B
G1
3 6
G2
P B _ U
1
1u
2 A N A _ S S V
3 A N A _ S S V
6 C
3 E
1 G I D _ S S V
2 G I D _ S S V
4 E
1 F R _ S S V
2 A
2 F R _ S S V
5 A
C1
14
6 A
S T C _ T R A U
4 F 4 G
S T R _ T R A U
D X R _ T R A U
6 F 5 F
D X T _ T R A U
L C _ D D V
7 D
7 E
D L C _ D D V
D _ D D V
2 G
7 B
M S D _ D D V
A _ V H _ D D V
7 A
1 G
D _ V H _ D D V
5 G
A _ O I _ D D V
B _ O I _ D D V
3 F
N _ D D V
7 C
1 A
F R _ D D V
1 A N A _ S S V
4 B
6 B
1 C
1 1 _ O I P G
2 B
6 1 _ O I P G
3 B
3 C
8 _ O I P G
1 B
9 _ O I P G
7 F
P U E K A W _ T S O H
3 G
K L C _ P L
A _ M C P
2 D
1 E
B _ M C P
1 D
K L C _ M C P
2 C
C N Y S _ M C P
6 D
N I _ K L C _ F E R
N _ T E S E R
3 D
4 A
N F R
P F R
3 A
5 B
P Q _ N I _ T U O T
N Q _ P I _ T U O T
5 E
G R P _ F A
P U E K A W _ T B
5 C
1 _ N I _ Q E R _ K L C
6 E
2 _ N I _ Q E R _ K L C
6 G
7 G
2 T U O _ Q E R _ K L C
4 C
1 _ T U O _ Q E R _ K L C
1 _ G I F N O C
2 E
1 F
2 _ G I F N O C
3 _ G I F N O C
2 F
5 D
0 _ O I P G
0 1 _ O I P G
C 0 0 5 2 C L T S 1 0 1 U
D E E F
1 C N
2 C N
0 0 1 T N A
220n
C
111
0 0 1 C
4 2 1 C
I N D
u 1
R1
10
0
N 0 S T C U
K 2 3 K L C
N I A T A D M C P
T U O A T A D M C P
K L C M C P
C N Y S M C P
N T E S E R _ T B
0 D X T U
N 0 S T R U
0 D X R U
0
9 0 1 R
V 7 . 2 _ O I _ D D V _ P A V 7 . 2 _ T B _ D D V _ P A
7 0 1 C
u 3 3
Figure. Schematic of Bluetooth Interface
X100
R110
R109
FL100 C123
ANT100