Nokia RM-609 Service Manual page 92

Introduction to Bluetooth/FM radio troubleshooting
The Bluetooth and FM radio are combined in the same ASIC, so both features are checked when
troubleshooting.
The following problems can occur with the Bluetooth and FM radio hardware:
Symptom
Unable to switch on Bluetooth on
phone user interface
Able to send data file to another
Bluetooth device, but unable to
hear audio through functional
Bluetooth headset
Able to switch on Bluetooth on
phone user interface, but unable
to detect other Bluetooth devices
Able to turn on FM radio and
Bluetooth on phone user
interface, but unable to detect
local FM radio stations with Nokia
headset inserted
Able to perform scans to detect
local FM radio stations with
functional Nokia headset
inserted, but unable to hear FM
audio through headset
Users may experience the following problems resulting in functional phones being returned to the repair
centre:
Symptom
Bluetooth feature does not
operate as desired with another
Bluetooth device
Poor FM radio reception (unable
to detect many radio stations)
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
Page 3 – 44
Problem
Open circuit solder joints or
component failure of BTH/FM
ASIC/module BB ASICs or SMD
components
Open circuit solder joints or
component failure of BTH/FM
ASIC/module BB ASICs
Open circuit solder joints or
antenna pins not making
contact with Bluetooth/WLAN
antenna
Open circuit solder joints or
detached component in FM
antenna circuit
Check antenna pin contacts with
Bluetooth/WLAN antenna
Open circuit solder joints or
detached component in FM
audio path between Bluetooth/
FM ASIC and headset
Problem
Bluetooth Profile implemented
in Bluetooth accessory not
supported in Nokia phone
Nokia headset not being used
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BB Troubleshooting and Manual Tuning Guide
Repair solution
Replacement of Bluetooth/
FM ASIC/module
Replacement of Bluetooth/
FM ASIC/module
Repair or replace Bluetooth/
WLAN antenna
Repair components or
replace Bluetooth/WLAN
antenna module
Repair of FM audio circuit
Repair solution
Use Bluetooth accessory with
Bluetooth profiles supported
by phone
Use Nokia headset
BT and FM Self Tests in Phoenix
RM-609
Issue 1