Toshiba Satellite A10 Maintenance Manual page 109

2 Troubleshooting Procedures
Procedure 3
Check 1
NOTE:
If the wireless LAN antenna cables pass the test, connect them to the Mini PCI card and cover
the Mini PCI slot, then perform Procedure 1.
If the wireless LAN antenna cables do not pass the test, replace the wireless LAN antenna
cables with new ones following the steps in Chapter 4, Replacement Procedures. If the
wireless LAN is still not functioning properly, go to Procedure 4.
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Antenna Check
Use an antenna test cable to check the antennas' connection. Follow the steps
below:
1. Remove the Mini PCI slot cover and lift it off. Refer to Chapter 4, Replacement
Procedures, for detailed steps of disassembling.
2. Disconnect the wireless LAN antenna cables (white and black) from the Mini
PCI card.
3. Connect the end of the antenna test cable to the multimeter.
4. Connect the Main antenna cable to the antenna test cable. One clip is
connected to the end of the antenna cable. The other is connected to the
opposite side of the antenna cable.
5. Determine the resistance. The cable passes the test when the resistance is less
than 5Ω. If it is more than 5Ω, the antenna cable fails the test.
6. Change the antenna cable. Perform from step 3 to check the black antenna
cable.
Figure 2-4 Antenna Test cable
1. The resistances determined with the steps above may not be stable with other
machines because of "cable loss," which varies according to the length of the
cable. The impedance of the antenna itself is about 0.5-0.8
2. The above steps cannot accurately determine the impedance of the antenna.
Use a LC meter for a precise measure of impedance.
Satellite A10/TECRA A1/Satellite Pro A10 Maintenance Manual (960-445)
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2.14 Wireless LAN Troubleshooting
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