LG SJ4Y Service Manual page 42

NO SOUND
2-4. PORTABLE
2-4-1. Solution
Replace MAIN board.
2-4-2. How to troubleshoot (Countermeasure)
1) Please check the soldering status of portable jack and check IC201 pin3 (VCC_5V), pin4 (D_3.3V).
2) If portable jack and voltage has abnormal status, replace MAIN board.
2-4-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
IC201 IC201
< MAIN board top view >
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