LG SPH5B-W - Sound (Optical)

3-9
ONE POINT REPAIR GUIDE
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)
< MAIN board top view >
IC507
IC507
R5R6
R5R6
R868
R868
R868
R868