Bluetooth Trouble Shooting - LG KM710 Service Manual

4.3 Bluetooth Trouble Shooting

Set BT Test mode ON
YES
Check BT Antenna Status
(Refer to figure 1)
YES
Check 1.8V from ABB
(Refer to figure 2)
YES
Check 26MHz
(Refer to figure 3)
YES
Check BT_CLK_REQ
(Refer to figure 4)
YES
Check BT_RF_OUT
(Refer to figure 5)
YES
Re-Download S/W
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NO
NO
NO
NO
NO
YES
Replace BT Module
In Engineering mode(2945#*#)
Set RF test mode and then BT ON
Replace BT Antenna
Check ABB(U102)
Check TCXO or
MAIN Transceiver
Check BT Module
Check FL500(Balun Filter)
YES
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4. Trouble Shooting
Check DBB(U103)
& Analog switch
LGE Internal Use Only