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Nokia Customer Care
Bluetooth Troubleshooting Diagram
BT
FAULT?
Connection
to JBT9, OK?
NOK
Check Vreg in
-2.8V from
C6036
capasitor.
Is it OK?
OK
Check
VDD_ANA
1.8V from
capasitor
C6031
OK
Check BC3
Xtal_in:
freq.12MHZ
swing=400-
900mV
(R6043), ok?
NOK
Check BT clock
path from APE
clock sheet
General Assumptions
Visual check and measurement of other passive components if needed.
Issue 1 11/2004
Figure 21: Bluetooth troubleshooting diagram for RM-12
OK
NOK
BER
<=0.1%
Check regulator:
NOK
~2.8V from
C4202 and
N4200 from
APE power
checking sheet
NOK
Change
BC3
OK
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Check RF path
components
(L6031, L6032,
C6046)
soldering/resolder
BT OK
Repeat
BER
test
RM-12
Repeat
BER
Test, OK?
NOK
Replace
Filter&
balun
(Z6030)
Repeat
BER
Test,
OK?
NOK
Page 96
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Troubleshooting
