LG LAS950M - Page 28

2-9
ONE POINT REPAIR GUIDE
NO SOUND
3-3. OPTICAL
3-3-1. Solution
Replace IC501 on MAIN board.
3-3-2. How to troubleshoot (Countermeasure)
1) Please check 3.3 VA (at L203).
2) If you can check 3.3 VA, please check OPT_DET signal (R204, R205) when optical mode.
3) In spite of process 2), set has abnormal output, then replace IC501.
3-3-3. Service hint (Any picture / Remark)
< MAIN board top view >
R204
R204
L203
L203
R205
R205
IC501
IC501