User Guide

Symptom Problem Repair solution
Able to switch on Bluetooth on
phone user interface, but unable
to detect other Bluetooth devices
Open circuit solder joints or
Pogo Pins not making contact
with c-cover.
Repair of antenna circuit or
replacement BT/WLAN/GPS
antenna.
Able to turn on FM radio and
Bluetooth on phone user
interface, but unable to detect
local FM radio stations with Nokia
headset inserted.
Open circuit solder joints or
detached component in FM
antenna circuit.
Repair of FM antenna circuit
or replacement AV connector
and flex.
Able to perform scans to detect
local FM radio stations with
functional Nokia headset
inserted, but unable to hear FM
audio through headset.
Open circuit solder joints or
detached component in FM
audio path between Bluetooth/
FM ASIC and headset.
Repair or replacement of FM
audio AV connector and
circuits.
Users may experience the following problems resulting in functional phones being returned to the repair
centre:
Symptom Problem Repair solution
Bluetooth feature does not
operate as desired with another
Bluetooth device.
Bluetooth Profile implemented
in Bluetooth accessory not
supported in Nokia phone.
Use Bluetooth accessory with
Bluetooth profiles supported
by phone.
Poor FM radio reception (unable
to detect many radio stations).
Nokia headset not being used. Use Nokia headset.
Test coverage
The tests listed in the table below should be performed to verify whether the Bluetooth and FM receiver and
transmitter are functional. The use of Self Tests are described in section BT and FM Self Tests in Phoenix
Test Test Coverage Repair solution
Blueooth Self Test: ST_LPRF_IF_TEST Bluetooth-FM ASIC UART interface
(controls Bluetooth and FM
receiver and transmitter).
Replacement of engine (or
repair of phone BB).
Bluetooth Self Test:
ST_BT_WAKEUP_TEST
Bluetooth ASIC interrupt control
interface.
Replacement of engine (or
repair of phone BB).
Bluetooth Self Test:
ST_LPRF_AUDIO_LINES_TEST
Bluetooth ASIC PCM interface. Replacement of engine (or
repair of phone BB).
Bluetooth Functional Test: BER test
with BT-Box or functional test with
other Bluetooth device.
Bluetooth antenna circuit. Repair of Bluetooth antenna
matching circuit or
replacement B/WLAN/GPS
antenna.
FM Radio Self Test: ST_RADIO_TEST FM Radio I2C interface. Replacement of engine (or
repair of phone BB).
RM-465
BB Troubleshooting
Page 3 –48 COMPANY CONFIDENTIAL Issue 1
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