Sound - LG SPM2 Service Manual

2. NO SOUND
2-1. BLUETOOTH
2-1-1. Solution
Replace Bluetooth module/ MAIN board.
2-1-2. How to troubleshoot (Countermeasure)
1) Please check status of Bluetooth cable connection. (at CN102 and module)
2) Please check VDD33A (at pin10 of CN102, 3.3 V).
If VDD33A is OK, please check BT_SCL, BT_SDA, BT_TX, BT_RST(pin1, 2, 9).
If no signal, please replace MAIN board.
If all, please replace BT module.
2-1-3. Service hint (Any picture / Remark)
FFC
10022H S-10C
CN102
ONE POINT REPAIR GUIDE
2.2
R111
VDD
RESET
RTS
CTS
TXD
R110
GND
RXD
0
GND
SCL
SDA
D GND
< MAIN board top view >
VD D 33A
L122
600ohm /0.5A
R117
100
R116
22
R115
22
R119
33
R114
33
R157
33
R158
33
CN102 CN102
3-7
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BT _RST
BT _CT S
BT _RT S
BT _RX
BT _T X
BT _SCL
BT _SD A
Only for training and service purposes.