Bluetooth Trouble Shooting - LG KE500 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
start
NO
NO
NO
NO
NO
YES
Replace BT Module
4. TROUBLE SHOOTING
In Engineering mode(2945#*#)
Set RF test mode and then BT ON
Replace BT Antenna
Check ABB(U103)
Check DCXO(X401) or
MAIN Transceiver(U403)
Check BT Module(U101)
Check FB100(Banun Filter)
YES
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Check DBB(U104)