IBM Thinkpad X30 X31 Manual

							FRU replacement notices
This section contains notices related to removing and
replacing parts. Read this section carefully before replacing
any FRU.
Screw notices
Loose screws can cause a reliability problem. In IBM
ThinkPad computer, this problem is addressed with special
nylon-coated screws that have the following characteristics:
vThey maintain tight connections.
vThey do not easily come loose, even with shock or
vibration.
vThey are harder to tighten.
vThey should be used only once.
Do the following when you service this machine:
vKeep the screw kit (for the P/N, see“Miscellaneous
parts”on page 164) in your tool bag.
vAlways use new screws.
vUse a torque screwdriver if you have one.
Tighten screws as follows:
vPlastic to plastic
Turn an additional90 degreesafter the screw head
touches the surface of the plastic part:
90 degrees more
(Cross-section)
vLogic card to plastic
Turn an additional180 degreesafter the screw head
touches the surface of the logic card:
180 degrees more
(Cross-section)
vTorque driver
If you have a torque driver, refer to the“Torque”column
for each step.
FRU replacement notices
ThinkPad X30, X3167 
						

							vMake sure you use the correct screw. If you have a
torque screwdriver, tighten all screws firmly to the torque
shown in the table.Never use a screw that you
removed. Use a new one. Make sure the screws are
tightened firmly.
Retaining serial numbers
This section includes the following descriptions:
v“Restoring the serial number of the system unit”
v“Retaining the UUID”
Restoring the serial number of the system
unit
When the computer was manufactured, the EEPROM on
the system board was loaded with the serial numbers of
the system and all major components. These numbers
need to remain the same throughout the life of the
computer.
If you replace the system board, you must restore the
serial number of the system unit to its original value.
Before replacing the system board, save the original serial
number by doing the following:
1. Install the ThinkPad Hardware Maintenance Diskette
Version 1.69, and restart the computer.
2. From the main menu, select1. Set System
Identification.
3. Select2. Read S/N data from EEPROM.
The serial number for each device is displayed. Write
down the serial number of the system unit, designated as
follows:
20: System unit serial number
After you have replaced the system board, restore the
serial number by doing the following:
1. Install the ThinkPad Hardware Maintenance Diskette
Version 1.69 and restart the computer.
2. From the main menu, select1. Set System
Identification.
3. Select1. Add S/N data from EEPROM.
Follow the instructions on the screen.
Note:The serial number of the system unit is written on
the label attached on the bottom of the computer.
Retaining the UUIDThe Universally Unique Identifier (UUID) is a 128-bit
number uniquely assigned to your computer at production
FRU replacement notices
68ThinkPad X30, X31 (MT 2672/2673) 
						

							and stored in the EEPROM of your system board. The
algorithm that generates the number is designed to provide
unique IDs until the year A.D. 3400. No two computers in
the world have the same number.
When you replace the system board, you must set the
UUID on the new system board as follows:
1. Install the ThinkPad Hardware Maintenance Diskette
Version 1.69, and restart the computer.
2. From the main menu, select4. Assign UUID.
A new UUID is created and written. If a valid UUID
already exists, it is not overwritten.
FRU replacement notices
ThinkPad X30, X3169 
						

							Removing and replacing a FRU
This section presents directions and drawings for use in
removing and replacing a FRU. Be sure to observe the
following general rules:
1. Do not try to service any computer unless you have
been trained and certified. An untrained person runs
the risk of damaging parts.
2. Before replacing any FRU, review“FRU replacement
notices”on page 67.
3. Begin by removing any FRUs that have to be removed
before the failing FRU. Any such FRUs are listed at the
top of the page. Remove them in the order in which
they are listed.
4. Follow the correct sequence in the steps for removing
the FRU, as indicated in the drawings by the numbers
in square callouts.
5. When turning a screw to replace a FRU, turn it in the
direction indicated by the arrow in the drawing.
6. When removing the FRU, move it in the direction
indicated by the arrow in the drawing.
7. To put the new FRU in place, reverse the removal
procedure and follow any notes that pertain to
replacement. For information about connecting and
arranging internal cables, see“Locations”on page 138.
8. When replacing a FRU, use the correct screw as
shown in the procedures.
DANGER
Attention:Before the computer is powered on after FRU
replacement, make sure that all screws, springs, and other
small parts are in place and are not loose inside the
computer. Verify this by shaking the computer gently and
listening for rattling sounds. Metallic parts or metal flakes
can cause electrical short circuits.
Attention:The system board is sensitive to, and can be
damaged by, electrostatic discharge. Before touching it,
establish personal grounding by touching a ground point
with one hand or by using an electrostatic discharge (ESD)
strap (P/N 6405959).Before removing any FRU, power off the computer,
unplug all power cords from electrical outlets,
remove the battery pack, and then disconnect any
interconnecting cables.
Removing and replacing a FRU
70ThinkPad X30, X31 (MT 2672/2673) 
						

							1010 Battery pack
DANGER
21
Use only the battery specified in the parts list for
your computer. The use of an incorrect battery can
result in ignition or explosion of the battery.
Removing and replacing a FRU
ThinkPad X30, X3171 
						

							1020 Hard-disk drive
Attention
vDo not drop or apply any shock to the
hard-disk drive.The hard-disk drive is sensitive
to physical shock. Incorrect handling can cause
damage and permanent loss of data.
vBefore removing the drive, have the user make a
backup copy of all the information on the drive if
possible.
vNever remove the drive while the system is
operating or is in suspend mode.
For access, remove following FRU:
v“1010 Battery pack”on page 71
1
Note:The hard disk is attached to the cover.
Step Screw (quantity) Torque

1M3×4 mm, nylon-coated (1) 0.4 Nm
(4 kgfcm)
(continued)
Removing and replacing a FRU
72ThinkPad X30, X31 (MT 2672/2673) 
						

							2
3
3
4
When installing:Make sure that the hard disk is
connected firmly.
Removing and replacing a FRU
ThinkPad X30, X3173 
						

							1030 DIMM cover
For access, remove following FRU:
v“1010 Battery pack”on page 71
Note:Loosen the screws
1, but do not remove them.
For X30 series
2
1
1
For X31 series
2
1
1
Removing and replacing a FRU
74ThinkPad X30, X31 (MT 2672/2673) 
						

							1040 DIMM
For access, remove following FRUs, in order:
v“1010 Battery pack”on page 71
v“1030 DIMM cover”on page 74
1
12
When installing:With the notched end of the DIMM
toward the socket, insert the DIMM into
the socket, and then press it firmly. Pivot
the DIMM until it snaps into place. Make
sure that the card is firmly fixed in the
slot and does not move easily.
Removing and replacing a FRU
ThinkPad X30, X3175 
						

							1050 Backup battery
DANGER
For access, remove following FRUs, in order:
v“1010 Battery pack”on page 71
v“1020 Hard-disk drive”on page 72
v“1030 DIMM cover”on page 74
2
1
When installing:Make sure that the battery connector

4is attached firmly. Use only the battery specified in the parts list for
your computer. The use of an incorrect battery can
result in ignition or explosion of the battery.
Removing and replacing a FRU
76ThinkPad X30, X31 (MT 2672/2673)