LG SH5B - Using Bluetooth Technology for Audio Streaming; About Bluetooth Wireless Communication; Bluetooth Profile Compatibility Standards; Bluetooth Device Pairing Procedure

3-5
ONE POINT REPAIR GUIDE
3. NO SOUND (PORTABLE FUNCTION)
3-1. Solution
Replace IC508 or portable jack (JK854).
3-2. How to troubleshoot (Countermeasure)
1) Please check the soldering status of portable jack (JK854).
2) Please check L854, L855 (portable L/R signal) of portable jack (JK854).
If you can’t find input signal, replace JK854.
3) If you can find input signal, check pin13, 14 of IC508.
4) If you can’t find signal at pin13, 14 of IC508, replace IC508.
3-3. Service hint (Any picture / Remark)
< MAIN board top view >
JK854
JK854
IC508
IC508
L855
L855
L854
L854