Toshiba Portege A600 Maintenance Manual page 108

2 Troubleshooting Procedures
Procedure 2 Antenna Connection Check
The 3G wiring diagram is shown below:
Any of the connections may be disconnected. Disassemble the computer following the steps
described in Chapter 4, Replacement Procedures, and perform the following checks:
Check 1 Make sure the 3G antenna cables are firmly connected to the 3G card and
FSISD*(SD board).
If the 3G antenna cables are disconnected, connect them firmly and go to
Procedure 1. If the 3G card is still not functioning properly, go to Check 2.
Check2 Make sure the 3G card connected to CN2621 on the PCIe Mini Card FPC. If the
connector is disconnected, connect it firmly and go to Procedure 1. If the 3G card
is still not functioning properly, perform Check 3.
Check3 Make sure the SIM card connected to IS2620 on the PCIe Mini Card FPC. If the
connector is disconnected, connect it firmly and go to Procedure 1. If the 3G card
is still not functioning properly, perform Check 4.
Check4 Make sure the CN2760 on the PCIe Mini Card FPC is firmly connected to CN2750
on the system board, connect it firmly and go to Procedure 1. If the 3G card is still
not functioning properly, perform Procedure 3.
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2.15 3G Troubleshooting
PORTEGE A600 Maintenance Manual (960-710)