LG KG320 - Page 76

4. TROUBLE SHOOTING
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No
Is BT_RST signal shape similar
to Fig.1 during Powering
on Bluetooth
Yes
Replace U102
2V8_VBT at C204=2.8V
No
BT_EN is 2.8V
No
Replace U201
Yes
Replace U200
Bluetooth
Power off
Is DEBUG_TX signal similar to
Fig.2 during Powering on
Bluetooth?
No
Replace U201
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 U202
Replace U202
Establish a call
Is DEBUG_RX signal similar to
Fig.4-10(b) during Powering on
Bluetooth?
No
Replace U202
Are PCM_SYC8,PCM_TX,USC3
signal similar to Fig.4-10(c) ?
No
Replace U201
Redownlapd SW
No
Checking Flow