2.15 Wireless LAN Troubleshooting

2 Troubleshooting Procedures

Procedure 3 Antenna Capability Check

Use an antenna test cable to check the antennas' connection. Follow the steps below.

Any of the connections may be disconnected. Disassemble the computer following the steps described in Chapter 4, perform the following checks:

1.Disassemble the computer and disconnect the wireless LAN antennas (white and black) from the wireless LAN board. Refer to Chapter 4, Replacement Procedures, for detailed steps of disassembling.

2.Connect the tester set up for impedance measurement to the antenna jig. Measure the white antenna’s resistance.

3.Determine the resistance. The antenna passes the test when the resistance is less than 5Ω. If it is more than 5Ω, the antenna is faulty.

4.Measure the black antenna’s resistance. Check if there is faulty.

 

 

Figure 2-3 Antenna Test jig

 

 

 

 

Measurement

Pass/fail

 

Comment

Value

 

 

 

 

 

 

 

Less than 5Ω

Pass

 

Include cable loss

 

 

 

 

More than 5Ω

Fail

 

The digital tester shows 0L ,etc. if there is a broken wire.

 

 

 

 

Note: 1. The resistances determined with the steps above may not be st able 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 an LC meter for a precise measure of impedance.

If each wireless antenna passes the above test, return the Wireless LAN module back, then perform Procedure 1.

If the wireless LAN has still an error, go to Procedure 4.

PORTEGE A100 Maintenance Manual (960-460)

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Toshiba A100 manual Procedure 3 Antenna Capability Check, Antenna Test jig

A100 specifications

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