Sound - LG SJ4Y Service Manual

2. NO SOUND
2-1. BLUETOOTH
2-1-1. Solution
Replace MAIN board.
2-1-2. How to troubleshoot (Countermeasure)
1) Please check status of Bluetooth cable connection. (at CN102 and BT module)
2) Please check 3.3 VA (at pin1 of CN102).
If 3.3 V is OK, please check BT_RST, BT_SPDIF, BT_RX, BT_TX (pin2, 4, 11, 12).
If no signal, please replace MAIN board.
2-1-3. Service hint (Any picture / Remark)
ONE POINT REPAIR GUIDE
 
CN102 CN102
 
CN102 CN102
< MAIN board top view >
3-8
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