3-13
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Only for training and service purposes.
R223
R235
TP301
TP302
C220
TP304
C225
C228
TP310
TP311
TP312
TP313
C236
C5B3
D20
ZD503
C270
C272
L301
L309
IC207
11
320
R305
R306
R307
R308
R309
R312
R313
R318
R519
R5D14
R521
C301
C302
C305
C306
C307
C308
C309
C310
C311
C312
C2A3
C313
C2A4
C314
C317
C318
R5
C2B2
C324
4
TP2
TP21
IC301
C382
IC505
R248
L306
L308
L313
L325
L326
L327
L328
L329
JK303
R301
R302
R330
R331
LG06
R346
R359
R360
R361
R362
R363
R365
R366
R367
R368
R369
R370
R371
C336
R372
C337
R373
R378
R379
RG06
R380
R381
R382
R383
C353
C359
Q208
C371
C372
C373
C374
C375
C376
C377
C378
C379
C380
C381
IC303
C383
IC304
C384
C385
C386
C387
C388
C389
C390
C391
C393
C394
C395
C396
C397
C398
C399
ONE POINT REPAIR GUIDE
NO SOUND
There is no sound output in the MIC IN function, repair the set according to the following guide.
5-4. MIC(Guitar) IN function
5-4-1. Solution
Replace MAIN board.
5-4-2. How to troubleshoot (Countermeasure)
1) Check MIC_SI & Guitar signal to pin1, 13 of IC303.
If no signal, Check the signals to pin6 & 8 of CNA301 on the MIC & RMC board.
2) Check if MIC_SIG and GUITAR is input from pin3, 12 of IC303 to pin3, 4 of IC301 .
If no signal output, check MIC_3.3V for IC303, replace IC303 with a new one if it has a problem.
3) Check if DSPI_BCK, LRCK,MCLK are entered from IC501 to IC301.
Check if MIC_DATA_IN is entered from pin19 of IC301 to pin E4 of IC501.
If no signal, check AVCC_3.3V & DVCC_3.3V for IC301.
If it is abnormal, change replace it a new one.
4) Check the following I2S signal flow from IC301 to IC501.
If there is any trouble, check the power for each IC.
If the signals are abnormal, replace it a new one.
5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on item 6-1.
If AMP is damaged, replace it with a new one.
5-4-3. Service hint (Any picture/ Remark)
IC303
< MAIN board top view >
Pin15:DSPI_MCLK
Pin16:DSPI_LRCK
Pin17:DSPI_BCK
< MAIN board bottom view >
IC301
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