LG LAP340 - Audio Output in Bt Function

3-6
ONE POINT REPAIR GUIDE
5-3. Service hint (Any picture / Remark)
5. NO AUDIO OUTPUT IN BT FUNCTION
5-1. Solution
Check BT module, CN302 and audio output trace on main board.
5-2. How to troubleshoot (Countermeasure)
1) Please check CN302’s Pin5, 7 (BT UART AUDIO).
2) Abnormal BT UART signal input/ output conditions Ö Try replacing CN302 or BT Module.
3) Normal BT UART signal input/ output conditions Ö Check IC301, IC303 working status
4) Normal IC301 operation conditions Ö Check no audio output sheet.
< Main board top view >
CN302
IC301
IC303