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ONE POINT REPAIR GUIDE
9. NO SOUND
There is no sound output in the AUX function, repair the set according to the following guide.
9-1. AUX FUNCTION
9-1-1. Solution
Replace IC200 on MAIN board.
9-1-2. How to troubleshoot (Countermeasure)
1) Check AUX_L/R signals to IC200(pin3, pin4).
2) Check if MCS_BCK, MCS_LRCK, & MCS_MCLK are entered from IC501 to IC200.
3) Check if ADC_DATA is entered from IC200 to IC501.
If no signal, check ADC_3.3 V & DVCC_3.3 V2 for IC200. If is NG, replace it a new one.
4) Check the following I2S signal flow from IC501 to IC600.
If there is any trouble, check the power for each IC.
The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one.
5) Check if the digital audio AMP block is okay.
If AMP is damaged, replace it with a new one.
9-1-3. Service hint (Any picture/ Remark)
< MAIN board top view >
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