LG F3000 - Page 74

4. TROUBLESHOOTING
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No
Is BT_RST signal shape similar
to Fig.1 during Powering
on Bluetooth
Yes
Replace U102
2V8_VBT at C743=2.8V
No
Replace U102
Bluetooth
Power off
Is DEBUG_TX signal similar to
Fig.2 during Powering on
Bluetooth?
No
Replace U102
Is DEBUG_RX signal similar to
Fig.2 during Powering on
Bluetooth?
No
Replace Headset
Connect BT headset?
No
Is RF Power level at
Antenna Feeding about
0dBm?
Is RF Power level at
Antenna Feeding about 0dBm?
Replace M701
Replace M701
Establish a call
Is DEBUG_RX signal similar to
Fig.4-10(b) during Powering on
Bluetooth?
No
Replace M701
Are PCM_SYC8,PCM_TX,USC3
signal similar to Fig.4-10(c) ?
No
Replace U102
Redownlapd SW
No
Checking Flow