Bluetooth Troubleshooting Flowchart - Nokia 6255 Rf Description And Troubleshooting

Nokia Customer Care

Bluetooth Troubleshooting Flowchart

Bluetooth
Is the VREG_IN BT
external supply
voltage 2.8V?
YES
Is the VIO bluetooth
external supply
voltage 1.8V? (Probe
at the UEM side.)
YES
Is the VDD_ANA
voltage regulator
output 1.8V?
YES
Is the XTAL_IN
450mVpp, 19MHz,
1.3Vdc?
YES
Are the TX_A and
TX_B power levels
each -15dBm?
YES
Is the SAW filter
output power level -
18dBm? (Probe at
the bluetooth
antenna.)
Issue 2 05/2005
Replace the EXT
NO
regulator. Is it OK?
Replace the R6002.
NO
Is it OK?
Replace the C6002
and R6001 buffer
NO
discretes. Is it OK?
Replace the L6000,
L6001, and C6000
NO
filter discretes. Is it
OK?
Replace the SAW
NO
filter. Is it OK?
©2005 Nokia Corporation
6255/6255i/6256/6256i (RM-19)
RF Description and Troubleshooting
NO
NO
Replace the digital
NO
inverter. Is it OK?
NO
Company Confidential
NO
Replace the BT ASIC
(N6000).
NO
NO
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