Bluetooth Trouble - LG -T370 Service Manual

4.13 Bluetooth Trouble

VBT_IO_1V8
VBT_PA_2V6
R703
C714
C714
R703
CON_ANT_FEED CON_ANT_FEED
3.3n
2.7n
C709
12n
C708
DNI
C709:TP3
C708:TP4
LGE Internal Use Only
C709(TP3)
C711(TP1)
U701
VDD_IO_1V8
Figure 4.16.1
Class 2 or 1.5
QCT VREG_MSME_1V8
IFX
QCT VREG_MSMP_2V6
IFX
BT_WIFI
2450MHz
FL701
1 3
IN OUT R704 DNI
2 4
GND1 GND2
100p
C710
BT_RF
C711: TP1
BTCX_RF_ACTIVE
C712
1n
BT_CLK_26M
C713
DNI
BT_WAKEUP_HOST
C713: TP2
ANT701
VDD_IO_1V8
When power class 1.5 is used, R307 is populated and R308 is depopulated.
(Vice versa for power class 2)
VIO_1V8
C706
VPA_2V85 10n
R702
15K
must have 1% tolerance
D6
RES
C7
RFP
E1
SCL
D1
SDA
R705 1K
BT_WAKEUP
C1
BTCX_STATUS SPIM_CLK
E2
SPIM_CS_N
B4
C711 1n
RTC_32K LPO_IN
F5
XIN
E5
XOUT
C3
BTCX_TXCONF GPIO_0
D5
GPIO_6
TP710 B3
GPIO_1
F4
BT_CLK_REQ GPIO_5
TP711
- 94 - Copyright © 01 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
C708(TP4)
C713(TP2)
VPA_2V85
VDD_IO_1V8
FB701
600
C702
C704
10n
10p
C703
C707 C701 C705
10p
10n
2.2u 2.2u
C5
TP701
RST_N
B5
REG_EN
C6
TM2
D4
PCM_IN
E4
PCM_OUT
C4
PCM_CLK
U701
A4
TP705
PCM_SYNC
TP706
BCM2070B2KUBXG
C2
UART_TXD
D2
UART_RXD
F2 TP707
TP708
UART_RTS_N
E3
TP709
UART_CTS_N
B2
HUSB_DN
A2
HUSB_DP
Only for training and service purposes
VDD_IO_1V8
BT_RST_N
TP702
BT_PCM_OUT
TP703
BT_PCM_IN
TP704
BT_PCM_CLK
BT_PCM_SYNC
BT_UART_RX
BT_UART_TX
BT_UART_CTS
BT_UART_RTS