dynabook PORTEGE X30L-J Series - Page 42

Maintenance Manual (960-943) 2-20
Troubleshooting Procedures
2.12.2 Procedure 2 Antenna/Connector Check
The 3G/LTE module, antennas and SIM card wiring diagram is shown
below:
Any of the connections may be defective. Disassemble the computer
following the steps described in Chapter 4, Replacement Procedures, and
perform the following checks:
Check 1
SIM card may not be firmly inserted. Remove it once and re-
insert it surely. Then perform Procedure 1 again. If the problem
still exists, perform Check 2.
Check 2
The connection of 3G antenna cables (MAIN, AUX) may be
loose or connected connector is wrong. Connect 3G antenna
cable correctly to the 3G/LTE module. Then perform Procedure
1 again. If the problem still exists, perform Check 3.
Check 3
The connection between 3G/LTE module and System board
may be loose. Connect 3G/LTE module surely to the System
board. Then perform Procedure 1 again. If the problem still
exists, go to procedure 3.
2.12.3 Replacement Check
The SIM card or SIM tray may be defective or damaged. Replace it with a
new one following the instructions in Chapter 4, Replacement Procedures.
If the problem still exists, 3G/LTE module, antenna or system board may
be faulty. Disassemble the computer following the steps described in
Chapter 4, Replacement Procedures, and perform the following checks:
Check 1
3G/LTE module may be defective or damaged. Replace it with a
new one following the instructions in Chapter 4, Replacement
Procedures and perform Procedure 1 again. If the problem still
exists, perform Check 2.
Check 2
Antennas may be defective or damaged. Replace them with new
ones following the instructions in Chapter 4, Replacement
Procedures and perform Procedure 1 again. If the problem still
exists, perform Check 2.
*DQWHQQD
$8;
*DQWHQQD
0$,1
3G/LTE module
$8;
0$,1
&1
6,0FDUG
,6
S
y
stem board