3-22
ONE POINT REPAIR GUIDE
NO SOUND
There is no sound output in the BLUETOOTH FUNCTION, repair the set according to
the following guide.
6-7. IN THE BLUETOOTH FUNCTION
6-7-1. Solution
Please check and replace IC501 on MAIN board and Bluetooth module on front panel.
6-7-2. How to troubleshoot (Countermeasure)
1) Check BT_RX, BT_TX signal to Pin5, 7 of CN504.
If no signal, check the signal to Pin5, 7 and Pin1(+3.3 V) of on the Bluetooth module and cable connection state.
If there are no signal out from module, replace new module.
2) Check if BT_RX/TX is entered from Pin5, 7 of CN504 to Pin169, 170 to IC501 (DSP).
3) Check if MIC_BCK, MIC_MLCK & MIC_O_DATA is entered from IC501 to IC600.
If no signal, check VCC12(+1.2 V) for IC501. If it is abnormal, change 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. 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.
If AMP is damaged, replace it with a new one.
6-7-3. Service hint (Any picture / Remark)
ju\W[
i{yUGGX]`
i{{UGGX^W
i{y{zUGGX^X
i{j{zUGGX^Y
i{j{zUGGZ
i{y{zUGG[
i{yUGG\
i{{UGG^
IC501
MLC3700
IC600
PS9854
PWM
DAC_BCK
DAC_LRCK
DAC_DATA
IR AMP
IRF6775
B/T Module
BT_RX,
BT_TX
< Signal check point >
< BLUETOOTH function signal
fl
ow >
Содержание CM9730
Страница 11: ...MEMO 1 10 ...
Страница 13: ...MEMO 2 2 ...
Страница 59: ...MEMO 3 42 ...
Страница 83: ...3 89 3 90 2 MAIN P C BOARD TOP VIEW ...
Страница 84: ...3 91 3 92 MAIN P C BOARD BOTTOM VIEW ...
Страница 85: ...3 93 3 94 3 VFD P C BOARD ...
Страница 86: ...3 95 3 96 4 MAIN VOLUME P C BOARD 5 MIC P C BOARD ...
Страница 87: ...3 97 3 98 6 JOG P C BOARD 7 USB P C BOARD 8 TUNER P C BOARD ...
Страница 88: ...3 99 3 100 9 SPEAKER LED_MAIN P C BOARD TOP VIEW 10 SPEAKER LED P C BOARD TOP VIEW BOTTOM VIEW BOTTOM VIEW ...
Страница 89: ...3 101 3 102 MEMO MEMO ...