LG SPM2 - Appendix; Product Specifications

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Only for training and service purposes.
ONE POINT REPAIR GUIDE
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)
VDD
RESET
CTS
RTS
TXD
GND
RXD
GND
SCL
SDA
FFC
BLUETOOTH 4.0
FROM/TO MCL3730SD - BT
R116
22
R115
22
C179
50V/10pF
C180
50V/10pF
C181
50V/10pF
C184
50V/10pF
C185
50V/10pF
C186
50V/10pF
C168
10V/10uF
C169
10V/0.1uF
R117
100
R112
2.2K
R113
2.2K
R110
0
C188
OPEN
C189
OPEN
C178
10V/0.1uF
C187
OPEN
R119
33
R114
33
R157
33
R158
33
R111
2.2
C167
10V/0.1uF
1
2
3
4
5
6
7
8
9
10
CN102
10022HS-10C
L122
600ohm/0.5A
BT_RST
BT_CTS
BT_RTS
BT_RX
BT_TX
BT_SCL
BT_SDA
DGND
VDD33A
< MAIN board top view >
CN102
CN102