Sound (Optical) - LG SH5B Service Manual

7. NO SOUND (OPTICAL)
7-1. Solution
Replace IC507 on MAIN bottom board.
7-2. How to troubleshoot (Countermeasure)
1) Please check 3.3VA at R868. If you can check 3.3 VA, please confirm OPT_DET signal (R5R6) when
optical mode.
2) In spite of process 1), set has abnormal output, then replace IC507.
7-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
R868 R868
IC507 IC507
< MAIN board top view >
R868 R868
3-9
R5R6 R5R6