3-3
ONE POINT REPAIR GUIDE
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)
< MAIN board bottom view >
L504
L505
IC500
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