LG SJ3 - Bluetooth Technology Guide; About Bluetooth Technology; Bluetooth Music Streaming; Pairing Your Bluetooth Device

3-5
ONE POINT REPAIR GUIDE
4. NO WIRELESS
4-1. Solution
Replace WIC500 on MAIN board.(No 3.3 V)
4-2. How to troubleshoot (Countermeasure)
1) Please check externally status of Wireless cable connection on your eyes.
(at CN503 and Wireless module)
2) Please check 3.3 V of WL_3V3 (at WL501).
If 3.3 V is ok at WL501, please check SPI signal (WL_SPI_CS/D0/WP/DI/CLK) of WIC500 (pin1, 2, 3, 5, 6).
3) If you can’t have no signal, please replace WIC500.
4) If 3) is OK, then proceed S/W update.
Update Wireless TX (Main set) and Wireless RX (Subwoofer) each.
4-3. Service hint (Any picture / Remark)
< MAIN board top view >
WIC500
WIC500
WL501
WL501
CN503
CN503
CN503
CN503
< Wireless Interface circuit >