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2.16 Bluetooth Troubleshooting 2 Troubleshooting Procedures
PORTEGE A100 Maintenance Manual (960-460) 2-53
Procedure 3 Antenna Check
Check 1 Use an antenna test cable to check the antennas' connection. Follow the steps
below:
1. Disassemble the computer and disconnect the Bluetooth antenna cable
connected to the Bluetooth module. Refer to Chapter 4, Replacement
Procedures, for detailed steps of disassembling.
2. Connect the end of the antenna test cable to the multimeter.
3. Connect the Bluetooth antenna cable to the antenna test cable. One clip is
connected to the end of the Bluetooth antenna cable. The other is connected to
the opposite side of the Bluetooth antenna cable.
4. Determine the resistance. The cable passes the test when the resistance is less
than 5Ω. If it is more than 5Ω, the Bluetooth antenna cable fails the test.
Figure 2-4 Antenna Test jig
Note: 1. The resistances determined with the steps above may not be stable according to
the length of the antenna. The impedance of the antenna itself is about 0.5 to 0.8
ohm.
2. The above steps cannot accurately determine the impedance of the antenna. Use
a LC meter for a precise measure of impedance.
If the Bluetooth antenna cable pass the test, connect it to the Bluetooth module
and cover the slot, then perform Procedure 1.
If the Bluetooth antenna cable does not pass the test, go to Procedure 4.
Procedure 4 Replacement Check
Check 1 The Bluetooth module may be defective or damaged. Replace the Bluetooth
module with a new one following the steps in Chapter 4, Replacement Procedures.
If the Bluetooth is still not functioning properly, perform Check 2.
Check 2 The system board may be defective or damaged. Replace the system board with a
new one following the steps in Chapter 4, Replacement Procedures.