LG S55A3-D Service Manual

3-6
ONE POINT REPAIR GUIDE
5. NO BLUETOOTH
5-1. Solution
Replace IC502 on MAIN board.(No 3.3 V)
5-2. How to troubleshoot (Countermeasure)
1) Please check externally status of Bluetooth cable connection on your eyes.(at CN508 and Bluetooth module)
2) Please check 3.3 V of 3.3VA (at L504).
If 3.3 V is OK at L504, please check BT_SDA, BT_SCL, BT_RST (pin53, 51, 25) of IC502
and BT_RX, BT_TX (pin29, 27).
If you have no signal, please replace IC502.
5-3. Service hint (Any picture / Remark)
< MAIN board top view >
< MAIN board bottom view >
IC502
IC502
L504
L504
CN508
CN508

LG S55A3-D Specifications

General

Brand	LG
Model	S55A3-D
Category	Speaker System
Language	English