2 Troubleshooting Procedures
2.14 Wireless LAN Troubleshooting
2-48
Portege 2000 Maintenance Manual (960-333)
Procedure 3 Antenna 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. Remove the wireless LAN slot cover and lift it off. Refer to Chapter 4 for
detailed procedure.
2. Disconnect the wireless LAN antenna (white and black) from the wireless LAN
board.
3. Connect the tester set up for impedance measurement to the antenna jig.
Measure the white antenna’s resistance
4. Determine the resistance. The antenna passes the test when the resistance is
less than 5
Ω
. If it is more than 5
Ω
, the antenna is faulty.
5. Measure the black antenna’s resistance. Check if there is faulty.
Figure 2-4 Antenna Test jig
Measurement Value Pass/fail
Comment
Less than 5
Ω
Pass
Include cable loss
More than 5
Ω
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 stable according
to the length of the antenna. The impedance of the antenna itself is about 0.5-
0.8
Ω
.
2. The above steps cannot accurately determine the impedance of the antenna.
Use an LC meter for a precise measure of impedance.
Summary of Contents for Portege 2000
Page 9: ...Chapter 1 Hardware Overview ...
Page 10: ...1 Hardware Overview 1 ii Portege 2000 Maintenance Manual 960 333 1 Hardware Overview ...
Page 30: ...1 Hardware Overview 1 7 AC Adapter 1 18 Portege 2000 Maintenance Manual 960 333 ...
Page 31: ...Chapter 2 Troubleshooting Procedures ...
Page 32: ...2 Troubleshooting Procedures 2 ii Portege 2000 Maintenance Manual 960 333 2 ...
Page 36: ...2 Troubleshooting Procedures 2 vi Portege 2000 Maintenance Manual 960 333 ...
Page 87: ...Chapter 3 Tests and Diagnostics ...
Page 88: ...3 Tests and Diagnostics 3 ii Portege 2000 Maintenance Manual 960 333 3 ...
Page 147: ...Chapter 4 Replacement Procedures ...
Page 148: ...4 Replacement Procedures 4 ii Portage 2000 Maintenance Manual 960 333 4 ...
Page 215: ...Appendices ...
Page 216: ...Appendices App ii Portege 2000 Maintenance Manual 960 333 ...
Page 222: ...Appendices App viii Portege 2000 Maintenance Manual 960 333 ...
Page 228: ...Appendices Apx A Handling the LCD Module A 6 Portege 2000 Maintenance Manual 960 333 ...
Page 264: ...Appendices Apx E Key Layout E 2 Portege 2000 Maintenance Manual 960 333 ...
Page 266: ...Appendices Apx F BIOS KBC EC Update F 2 Portege 2000 Maintenance Manual 960 333 ...
Page 268: ...Appendices Apx G Reliability G 2 Portege 2000 Maintenance Manual 960 333 ...
Page 270: ...Appendices Apx H Key FD H 2 Portege 2000 Maintenance Manual 960 333 ...