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Checking Flow
Is BT_RST signal shape similar
to Fig.1 during Powering
on Bluetooth
Yes
2V8_VBT at C743=2.8V
Bluetooth
Power off
Is DEBUG_TX signal similar to
Fig.2 during Powering on
Bluetooth?
Is DEBUG_RX signal similar to
Fig.2 during Powering on
Bluetooth?
Connect BT headset?
Establish a call
Are PCM_SYC8,PCM_TX,USC3
signal similar to Fig.4-10(c) ?
Is DEBUG_RX signal similar to
Fig.4-10(b) during Powering on
Bluetooth?
Redownlapd SW
No
Replace U102
No
Replace U102
No
Replace U102
No
Replace M701
No
Is RF Power level at
Antenna Feeding about
0dBm?
Replace Headset
No
Replace U102
No
Replace M701
- 75 -
4. TROUBLESHOOTING
No
Is RF Power level at
Antenna Feeding about 0dBm?
Replace M701
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