Bluetooth Trouble - LG KE600 - Cell Phone Service Manual

5.13 Bluetooth trouble

Check Points
-A condition of Bluetooth Antenna soldering
-Balun filter is correctly working
-Bluetooth data is perfectly flowed
-Power and clock signals are supplied in U202
2V65_BT 1V5_CORE
C220 C221
0.1u 0.1u
Checking Points
C222
C202
R207
BLUETOOTH
R205 0
USIF_TXD
R206 0
USIF_RXD
B6
TP203 TDO
1V8_MEM VBALUN
A7
TDI
TP204
B4
TP205 TMS
B7
TP206 TCK
A6
TP207 TRST_
B9
TP208 RTCK
A5
TP209 JTAG_
F1
VDDSUP
D2
VDDCREG
A8
VDD_1
B3
VDD_2
F9
VDDC1
B5
VDDC2
G2
VDDPMREG
H4
VDDRF
E1
VDDRFREG1
E2
VDDRFREG2
H1
VDDPLL
J6
VCOCAP1
H6
VCOCAP2
0.1u
C223 C224
C222
C225 C226
0.1u
C219 1.5p 0.1u
0.01u 1000p
BT_CLK
NC1
NC2 FEED
ACS2450HBAM6
BT201
Figure 30 Bluetooth circuit
U202
C220 C221
Figure 20. Bluetooth Part
- 99 -
5. Trouble shooting
2V72_IO 1V8_MEM
R201
0
C201 C202
0.1u 0.1u
I2S1_CLK
I2S1_WA
I2S1_RX
I2S1_TX
TP201 TP202
C9
SCL0_P0_13
C8
PCMFR2_SDA0_P0_12
F8
SLEEPX_P0_15 BT_VCXO_EN
C2 R207 0
CLK32K
CLK32_P1_5
B1
WAKEUP_HOST_P1_8
B2
WAKEUP_BT_P1_7
D1 TP210
BT_RESETn
RESET_
H5
U202 RFOUT
PMB8753
A4
PAON
A3
PSEL0
B8
PSEL1
A2
TX_CONF_RXON
F2
VSSVCO
F4
VSSRF1
E5
VSSRF2
F5
VSSRF3
E4
VSSRF4
L202
2.2nH
C229
2.2p
L203
2.2nH
VBALUN
FL201
1 4
UB B2
2 3
DC B1
C230
100p DBF71B601
C201
C230
BT201
FL201
C635