LG LAS551H - Sound (Portable Function)

3-4
ONE POINT REPAIR GUIDE
3. NO SOUND (PORTABLE FUNCTION)
3-1. Solution
Replace IC508 or portable jack (JK851).
3-2. How to troubleshoot (Countermeasure)
1) Please check the soldering status of JK851.
2) Please check L854, L855 (PORT_L, PORT_R signal) of portable jack (JK851).
If you cannot find input signal, replace JK851.
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)
< HDMI & JACK board top view >
< MAIN board bottom view >
JK851
JK851
L854
L854
L855
L855
IC508
IC508