Speaker No Audio Output - LG SJ2 Service Manual

2. SPEAKER NO AUDIO OUTPUT

No audio output problem occurs when you power on the unit.
2-1. Solution
Replace IC500.
2-2. How to troubleshoot (Countermeasure)
1) Check L504, L505. If it is not appear 21 V, please check the switch power supply board.
2) 21 V the voltage is normal, please check IC500 pin20, 21, 22 I2S signal.
3) If it is not I2S signal, check IC305 and IC304.
4) There are I2S signal, check whether IC500 damage.
2-3. Service hint (Any picture/ Remark)
L505 L505
L504 L504
ONE POINT REPAIR GUIDE
< MAIN board bottom view >
IC500 IC500
3-3