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NO SOUND
There is no sound output in the PORT. IN FUNCTION, repair the set according to the
following guide.
6-5. IN THE PORT. IN FUNCTION
6-5-1. Solution
Please check and replace IC202 on MAIN board.
6-5-2. How to troubleshoot (Countermeasure)
1) Check PT_L/R signal from Main board to USB board.
2) Check if PT_LR is entered from Pin1 & 3 of CN3M01 to Pin1 & 3 to CN202.
3) Check POT_L/R signals to IC202(Pin21, 22).
4) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202.
5) Check if ADC_DATA is entered from IC202 to IC501.
If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one.
6) Check the following I2S signal flow from IC501 to IC602. (Refer to Item 5-1.)
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.
7) Check if the digital audio AMP block is okay. Refer to "Digital Audio AMP" guide on Item 6-3.
If AMP is damaged, replace it with a new one
6-5-3. Service hint (Any picture / Remark)
POT_L/R
IC202
CS5346
DAC_MCLK
ADC_DATA
IC501
DAC_LRCK
MLC3700
DAC_DATA
DAC_MCLK
IC801
BEAT_DATA
FS503B
BEAT BOX
< PORT. IN function signal fl ow >
ONE POINT REPAIR GUIDE
MIC
POT. IN
Board
DAC_BCK
AMP IC
IC602
PS9854
TAS5631
PWM
< Signal check point >
3-29
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