LG NB3532A Service Manual page 17

RECEIVER BAR ONE POINT REPAIR GUIDE
1-3. NO SOUND
1-3-1. Portable or Optical Function
1-3-1-1. Solution
Replace IC301 or IC304 or Portable/ Optical Jack.
1-3-1-2. How to troubleshoot (Countermeasure)
1) Please check Portable input and Optical Input.
Please check ADC output(Pin9, 10, 13 - I2S signal).
Please check DSP input(Pin80, 94 - S/PDIF signal).
2) If you cannot find input signal, replace Portable/ Optical Jack.
If you cannot find ADC output I2S signal, replace IC304.
If you cannot find DSP input S/PDIF signal, replace IC301.
1-3-1-3. Service hint (Any picture / Remark)
IC304
IC301
< MAIN board top view >
3-4