LG KU950 Service Manual page 105

4. TROUBLE SHOOTING
VREG_BT_2.85V
C113
1u
ACS2450ICAU92
GND2 FEED
GND1
ANT100
TP1
C162 1000p
TCXO_BT
VREG_BT_2.85V
C114 C115 C116 C117 C118
33p 0.01u 0.01u 1u 33p
TP2
R119 0
16
ANT
13
NC
2
LDO1
3
LDO2
C120 C119
1u
2.2u
VREG_BT_2.85V
C157
1000p
R127
100K
U104
TC7S04FU
TCXO_OUT
C171
TCXO_PM
Schematic of Bluetooth RF Block
TP3
BLUETOOTH
M100
LG INNOTEK
LBDA254FJ0
6
SBST
10
SBCK
11
SBDT
5
SYNC_DET_TX_EN
8
RX_BB_TX_BB
4
XTAL_IN
9
CLK_REF
R121 R122
47K 47K
C158 C159
1000p 0.1u
TP5
19.2MHz
VCC GND
4
X100
C163
OUT VCONT
3
1000p
TG-5001LA-19.2MHz
100p
- 106 -
BT_SBST
BT_SBCK
BT_SBDT
BT_TX_RX_N
R120
0
BT_DATA
C112 1000p
TCXO_BT
C111 1000p
BT_CLK
TP4
VREG_TCXO_2.85V
2
R128
TRK_LO_ADJ
1
100ohm
C165
0.01u