LG KF600w Service Manual page 122

Start
1. Press ##5473784236368 + SEND Key ( to set Bluetooth Test Mode)
2. Press #5. FCC Test
3. Press #3. Bluetooth FCC
4. Press #8. DUT Mode
Compare with Figure 1.
Is it similar?
Check VDD_MSM.
+2.6V_MSMP2 is OK?
Check VDD_BAT.
+2.85V_BT is OK?
Compare with Figure 2.
Normal signal is 12MHz.
CLK_Ref is OK?
Bluetooth will work properly.
Checking Flow
Checking Flow
YES
YES
YES
YES
Waveform
Waveform
NO
Check VCTCXO circuit.
NO
There is a problem with PMIC.
Refer to Logic Troubleshoot.
NO
There is a problem with PMIC.
Refer to Logic Troubleshoot.
NO
Replace U502.