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4.1
General
This section explains how to disassemble the T4400SXC and replace Field Replaceable Units
(FRUs) in the T4400SXC. It may not be necessary to remove all the FRUs in order to replace
one. The chart below is a guide to which FRUs need to be removed in order to remove
another. Always start by removing the battery pack, then follow the lines on the chart to find
out which FRU you must remove next in order to repair the one you think is causing the
T4400SXC to operate improperly.
I
0
The Battery Pack
!I--------i
l
0
The TFT Color LCD
I
I
o
The Optional Modem Card
o
The Keyboard
o
The Built-in Modem Assembly
o
The RTC battery
o
The Top Cover
~
: 0
The LED Panel
I
o
The Power Supply
o
The Sub battery
....
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o
The Floppy Disk Drive unit
o
The Hard Disk Drive unit
o
The System board
Before You Begin
Look over the procedures in this section before you begin disassembling the T4400SXC.
Familiarize yourself with the steps required to disassemble the T4400SXC in order to fix the
FRU you think is causing the computer to operate abnormally. Begin each procedure by
removing the AC adapter and the battery pack as instructed in section 4.2, Removing the
T4400SXC Battery Pack:
I.
Do not disassemble the T4400SXC unless it is operating abnormally.
2.
Use only the correct and approved tools.
3.
Make sure the working environment is free from the following elements
whether you are using or storing the T4400SXC:
o
Dust and contaminates.
o
Static electricity.
o
Extreme heat, cold and humidity.
4.
Make sure the FRU you are replacing is causing the abnormal operation by
preforming the necessary diagnostics test described in this manual.
5.
Do not perform any operations that are not necessary and use only the
described procedures for disassembling and installing FRUs in the T4400SXC.
6.
After removing parts from the computer, place them in a safe place away from
the computer so they will not be damaged and do not interfere with your work.
4-5
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