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NO SOUND
There is no sound output in the MIC IN FUNCTION, repair the set according to the
following guide.
6-7. IN THE MIC IN FUNCTION
6-7-1. Solution
Please check and replace IC603, IC605 on MAIN board.
6-7-2. How to troubleshoot (Countermeasure)
1) Check MIC_SIG signal to Pin6 of CN601.
If no signal, Check the signal to Pin6 of CN3M01 on the MIC board.
Check if the signal is entered from Pin6 of CN3M01 to MAIN board.
2) Check if MIC_SIG is entered from Pin6 of CN601 to pin3 of IC605 (MIC AMP).
3) Check if the amplified signal is entered from pin4 of IC605.
If no signal output, check +12 V for IC605, replace IC605 with a new one if it has a problem.
4) Check if MIC_BCK & MIC_LRCK is entered from IC507 to IC603 and DAC_MLCK from IC501 to IC603.
Check if MIC_DATA is entered from Pin9 of IC603 to pin7 of IC602.
If no signal, check +5 V & +3.3 V for IC603. If it is abnormal, change replace it a new one.
6) Check the following I2S signal flow from IC603 to IC602.
If there is any trouble, check the power for each IC. If the signals are abnormal, replace it 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.
6-7-3. Service hint (Any picture / Remark)
MIG_SIG
IC603
AK5358
DAC_MCLK
MIC_I_DATA
IC501
MLC3700
DAC_DATA
DAC_MCLK
IC801
BEAT_DATA
FS503B
BEAT BOX
< MIC IN function signal fl ow >
ONE POINT REPAIR GUIDE
MIC IN
IC605
MIC
S4308
Board
DAC_BCK
AMP IC
IC602
DAC_LRCK
TAS5631
PS9854
PWM
< Signal check point >
3-31
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