LG KG800 - BT Trouble

4. TROUBLESHOOTING
- 78 -
4.7 BT Trouble
_BT_RST
BT_EN
TEST POINT
47K
R104
100K
R110
BLUETOOTH
(BT ANT -> TRANSFER TO FETCH ANT)
( 903015 )
CLOSED TO BT MODULE
GND1
5
VCC
2V8_VBT
ANT1
TC7SH08FS
U101
GND
2
1
3
4
C104
1u
SPI104
C105
15p
1u
C107
15p
C108
2V8_VBT
C102
NA
C103
NA
NA
C101
VBAT
SPI101
1u
C106
1u
C109
U102
BGND
62
GND
NC
51
STBY
3
VIN VOUT
4
BH28FB1WHFV
3.3nHR101
L101 22nH
SPI102
SPI103
SPI_MISO
SPI_MOSI
12
UART_CTS
26
23
UART_RTS
UART_RX
24
27
UART_TX
VDD_1_8V
22
21
VDD_DIG
3
VDD_VREGIN
2V8_VBT
GND3
25
GND4
NC
28
PCM_CLK
20
19
PCM_IN
17
PCM_OUT
PCM_SYNC
18
1
PIO0
PIO1
2
7
PIO2
PIO3
8
9
PIO4
PIO5
10
RESETB
16
13
SPI_CLK
SPI_CSB
14
15
M101 LBMA-2C67B2
5
ANT
GND1
4
GND2
6
11
BT_EN
PCM_TX
USC3
DEBUG_TX
DEBUG_RX
USC0
PCM_RX
_BT_RST
PCM_TX
CIRCUIT DIAGRAM
B1
GND
C2
IN1
A2
IN2
NC1
C1
A1
NC2
NO1
C4
A4
NO2
B4
V+
U306 MAX4717EBC-T
C3
COM1
A3
COM2
10K
R314
USC_300
C334
0.1u
2V8_VMEM
USC_301
PCM_TX
PCM_RX
USC2
USC1
PCM_EN
USC_2
USC_1