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ONE POINT REPAIR GUIDE
NO SOUND
There is no sound output in the Bluetooth function, repair the set according to the following guide.
9-5. BLUETOOTH FUNCTION
9-5-1. Solution
Replace IC501 on the MAIN board or bluetooth module on the FRONT Panel.
9-5-2. How to troubleshoot (Countermeasure)
1) Check BT_RX, BT_TX signal to pin4, pin6 of CN504.
If no signal, check the signal to pin4, pin6 and pin10 (+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 pin4, pin6 of CN504 to pin K1, pin L1 to IC501(DSP).
3) Check if MCS_BCK, MCS_LRCK & MIX_DATAN is entered from IC501 to IC202.
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 IC202.
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.
If AMP is damaged, replace it with a new one.
9-5-3. Service hint (Any picture/ Remark)
IC501
IC600
PWM
MCS_BCK
MCS_LRCK
MIX_DATA_OUT
IR AMP
B/T Module
BT_RX,
BT_TX
< MAIN board top view >< MAIN board bottom view >
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