Checking Bluetooth Block - LG CU920 Manual

4.9 Checking Bluetooth Block

1. TP1 : VREG_BT_2.85V
2. TP2 : VREG_MSMP_2.7V
3. TP3 : TCXO_BT
4. TP4 : BT ANT Output
5. TP5 : BT_CLK
TP5
TP2
TP1
BLUETOOTH
TP4
L102
0
C103
1.2p
TP5
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Only for training and service purposes
Fig. 4.9.1 Test point of the Bluetooth Block
C101
1000p
U101
RB04
GND1
16
ANT GND2
GND3
C124
NA
C105
C104
1000p
1u
C110
100p
Fig. 4.9.2 Schematic of the Bluetooth Block
4. TROUBLE SHOOTING
TP3
TP4
TP3
GND
3
4
5
1000p
VCC
C102
1
7
15
VREG_BT_2.85V
TP1
C106
1u
C108
2.2u
C107
100p
C109
0.1uF
VREG_MSMP_2.8V
TP2
- 107 -
TC7S04FU
U100
TCXO_BT
2
C100
100p
100K
R100
LGE Internal Use Only