Nokia RM-626 Service Manual page 103

RM-626
BB Troubleshooting and Manual Tuning Guide
Symptom
Able to switch on Bluetooth on
phone user interface, but unable
to detect other Bluetooth devices
Problems connecting to specific
manufacturer/model Bluetooth
accessory (specific Bluetooth
profile supported by phone and
accessory in product
specification)
Able to turn on FM radio and
Bluetooth on phone user
interface, but unable to detect
local FM radio stations with FM
headset inserted
Able to perform scans to detect
local FM radio stations with
functional FM 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)
BT and FM radio test coverage
The tests listed in the table below should be performed to verify whether the Bluetooth and FM receiver are
functional. The use of self tests is described in section
Test
Blueooth Self Test: ST_LPRF_IF_TEST
Bluetooth Self Test:
ST_BT_WAKEUP_TEST
Bluetooth Self Test:
ST_LPRF_AUDIO_LINES_TEST
Issue 1
Problem
Open circuit solder joints or
detached component in
Bluetooth antenna circuit
Possible interoperability issue
with accessory fixed in recent
Nokia phone software release
(check Nokia Service Bulletin for
the latest information)
Open circuit solder joints or
detached component in FM
antenna circuit
Open circuit solder joints or
detached component in FM
receiver 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
Test Coverage
Bluetooth-FM ASIC UART interface
(controls Bluetooth and FM
receiver and transmitter)
Bluetooth ASIC interrupt control
interface
Bluetooth ASIC PCM interface
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Repair of Bluetooth antenna
circuit
Update phone software to
the latest version if advised
in Nokia Service Bulletin
Note:
Bluetooth Address and
software version are
displayed by pressing
*#2820# when Bluetooth
is on.
Repair of FM receiver antenna
circuit
Repair of FM audio circuit
Use Bluetooth accessory with
Bluetooth profiles supported
by phone
Use Nokia headset
Bluetooth and FM radio self tests in Phoenix .
Repair solution
The phone
Repair solution
Repair solution
Replacement of BOB module
(or repair of phone BB)
Replacement of BOB module
(or repair of phone BB)
Replacement of BOB module
(or repair of phone BB)
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