LG SH5B - Playing Music via Bluetooth Connection; Streaming Music from a Bluetooth Device; Bluetooth Connection Best Practices and Notes

3-6
ONE POINT REPAIR GUIDE
4. NO WIRELESS
4-1. Solution
Replace IC505 on MAIN bottom board. (No 3.3 V)
4-2. How to troubleshoot (Countermeasure)
1) Please check externally status of wireless cable connection on your eyes.
(at CN506 and wireless module)
2) Please check 3.3 V of WL_3V3 (at FB507).
If 3.3 V is ok at FB507, please check SPI signal (WL_SPI_CS/DO/WP/DI/CLK) of IC505 (pin1, 2, 3, 5, 6).
3) If you can’t have no signal, please replace IC505.
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 >
IC505
IC505
FB507
FB507
CN506
CN506