Symptom, Problem And Repair Solution - Nokia RM-761 Service Manual

Symptom, Problem and Repair Solution

The following problems can occur with the Bluetooth 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
Problems connecting to specific
manufacturer/model Bluetooth
accessory (specific Bluetooth
profile supported by phone and
accessory in product
specification)
Users may experience the following problems resulting in functional phones being returned to the repair
centre:
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Figure 47 Test points in Bluetooth ASIC circuit – BTHCost4.0D (CSR8810)
Open circuit solder joints or
component failure of BTH ASIC,
BB ASICs, or SMD components.
Open circuit solder joints or
component failure of BTH ASIC,
BB ASICs (PCM interface).
Open circuit solder joints or
detacted component in
Bluetooth antenna circuit.
Possible interoperability issue
with accessory fixed in recent
Nokia phone software release
(check Nokia Service Bulletin for
latest information)
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Problem
RM-761; RM-799; RM-800
RF Troubleshooting
Repair Solution
Replacement of Bluetooth ASIC
Replacement of Bluetooth ASIC
Repair of Bluetooth antenna
circuit
Update phone software to latest
version if advised in Nokia Service
Bulletin.
Note: The phone Bluetooth
Address and software version are
displayed by pressing *#2820#
when Bluetooth is on.
Issue 1