Bluetooth Trouble - LG -T500 Service Manual

4.14 Bluetooth Trouble

TEST POINT
TP1_C708
TP2_C709
RTC_32K C712
CIRCUIT
VBT_IO_1V8
VBT_PA_2V6
TP1 TP
R707
CON_ANT_FEED
0
C708 C709
DNI
DNI
2450MHz
LGE Internal Use Only
ANT701
ANT702
CIRCUIT
Figure 4.16.1
QCT VREG_MSME_1V8
VIO_1V8
IFX
QCT VREG_MSMP_2V6
VPA_2V85
IFX
R706
15Kohms
must have 1% tolerance
FL701
R709
1 3
IN OUT
2 4
0
GND1 GND2 Base version
R710
BT_RF
DNI
BT_WAKEUP
BTCX_STATUS
BTCX_RF_ACTIVE
RTC_32K
C713
1n
BT_CLK_26M
C710
BTCX_TXCONF
DNI
BT_WAKEUP_HOST
BT_CLK_REQ
VDD_IO_1V8
When power class 1.5 is used, R307 is populated and R308 is depopulated.
(Vice versa for power class 2)
FB701
600
C701
2.2u
C706 C707
10n 10n
D6
RES
C714
C7
RFP
10p
E1
SCL
D1
SDA
R780 1K
C1
SPIM_CLK
E2
SPIM_CS_N
U701
C712 1n B4
LPO_IN
F5
XIN
E5
XOUT
C3
GPIO_0
D5
GPIO_6
TP707 B3
GPIO_1
F4
GPIO_5
R711 0
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4. TROUBLE SHOOTING
BT_CLK_26M C713
U701
VDD_IO_1V8
VPA_2V85
R702
R703
0
0
C702
C704
10n
10p
C705
C703
2.2u
10p
TP702
C5
BT_RST_N
RST_N
B5
REG_EN
C6
TM2
D4
PCM_IN
E4
PCM_OUT
C4
PCM_CLK
A4
PCM_SYNC
TP706
C2
UART_TXD
D2
UART_RXD
TP705
F2
UART_RTS_N
E3 TP701
UART_CTS_N
TP703
B2
HUSB_DN
A2
HUSB_DP
Only for training and service purposes
VDD_IO_1V8
BT_PCM_OUT
BT_PCM_IN
BT_PCM_CLK
BT_PCM_SYNC
BT_UART_RX
BT_UART_TX
BT_UART_CTS
BT_UART_RTS