Checking Bluetooth Block - LG U370 Service Manual

4.7 Checking Bluetooth Block

TP4
TP3
BT_CLK
VREG_MSMP_2.7V
VREG_BT_2.85V
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TP1
TP2
Test Point of the Bluetooth Block
BLUETOOTH
TP2
TP1
LBRQ-2B43A
C12 1000p
9
CLK_REF
C14 1u 3
VCC_OUT
C13 2.2u 2
VDD_INT
10
VDD_MSM
14
VDD_BAT
Schematic of the Bluetooth Block
4. TROUBLE SHOOTING
TP1. VREG_BT_2.85V
TP2. VREG_MSMP_2.7V
TP3. TCXO_BT
TP4. BT ANT Output
TP4
R2
0
L1
1.8p
M1
4
SBST
11
SBCK
12
SBDT
5
SYNC_DET_TX_EN
13
RX_BB_TX_BB
C11
7
XTAL_IN
- 85 -
ANT1
NC1
FEED NC2
TP3
BT_SBST
BT_SBCK
BT_SBDT
BT_TX_RX_N
BT_DATA
1000p
TCXO_BT
LGE Internal Use Only