IBM Thinkpad X20 X21 X22 X23 X24 Manual

							Removing and replacing a FRU
This section presents information and drawings for use in
removing and replacing a FRU. Be sure to observe the
following general rules:
1. Do not try to service the 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 54.
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 98.
8. When replacing a FRU, use the correct screw as
shown in the procedures.
CAUTION:
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.
CAUTION:
The battery consists of small amount of nickel. Do not
disassemble it, throw it into fire or water, or
short-circuit it. Dispose of the battery pack as required
by local ordinances or regulations.
Chapter 3. ThinkPad X20, X21, X22, X23, X24
57 
						

							Attention:
Before the computer is powered on after FRU
replacement, make sure 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, and can be damaged by
electrostatic discharge. Establish personal grounding by
touching a ground point with one hand before touching
these units.
You must use an electrostatic discharge (ESD) strap (P/N
6405959) to establish personal grounding.
1010 Battery pack
21
58ThinkPad X20, X21, X22, X23, X24 
						

							1020 DIMM
vBattery pack (1010)
1
2
Note:Loosen the screw
1but do not remove it.
Step Screw (quantity) Torque

1M2×3.4 mm,
Nylock-coated (1) BK14.7 Ncm (1.5 kgfcm)
3
4
Chapter 3. ThinkPad X20, X21, X22, X23, X2459 
						

							1030 Backup battery
vBattery pack (1010)
vDIMM (1020)
CAUTION:
The backup battery is a lithium battery and can cause
a fire, an explosion, or severe burns. Do not recharge
it, remove its polarized connector, disassemble it, heat
it above 100°C (212°F), incinerate it, or expose its cell
contents to water. Dispose of the battery as required
by local ordinances or regulations. The use of an
incorrect battery can result in ignition or explosion of
the battery.
60ThinkPad X20, X21, X22, X23, X24 
						

							1040 Hard disk drive
vBattery pack (1010)
Attention: Do not drop the hard disk drive or apply
any shock to it.The hard disk drive is sensitive to
physical shock. Incorrect handling can cause damage and
permanent loss of data. Before removing the drive, have
the user make a backup copy of all the information on the
drive if possible. Never remove the drive while the system
is operating or is in suspend mode.
1
2
Note:The hard disk is attached to the cover.
Step Screw (quantity) Torque

1M3×3.5mm,
Nylock-coated (1) BK19.6 Ncm (2 kgfcm)
1
1
1
1
When installing:Make sure that the HDD connector is
firmly connected.
Step Screw (quantity) Torque

1M3×3 mm (4) Red 19.6 Ncm (2 kgfcm)
Chapter 3. ThinkPad X20, X21, X22, X23, X2461 
						

							62ThinkPad X20, X21, X22, X23, X24 
						

							1050 Keyboard
vBattery pack (1010)
vHard Disk Drive (1040)
For X20, X21
1
Step Screw (quantity) Torque

1M2×4.5 mm,
Nylock-coated (4) BK19.6 Ncm (2 kgfcm)
Chapter 3. ThinkPad X20, X21, X22, X23, X2463 
						

							When installing: When installing the keyboard, do as
follows:
1. Install the new keyboard, following the directions in the
figure. Make sure that the keyboard edges, shown in
the figure as (A), (B), (C), (D)and (E), are under the
frame.
A
B
C
D
E
64ThinkPad X20, X21, X22, X23, X24 
						

							2. Align the tabs of the keyboard with the corresponding
slots; then press the keyboard until it snaps into place.
For X22, X23, X24
1
Step Screw (quantity) Torque

1M2×7 mm, Nylock-coated
(3) BK19.6 Ncm (2 kgfcm)
Chapter 3. ThinkPad X20, X21, X22, X23, X2465 
						

							When installing: When installing the keyboard, do as
follows:
1. Install the new keyboard, following the directions in the
figure. Make sure that the keyboard edges, shown in
the figure as (A), (B), (C), (D)and (E), are under the
66ThinkPad X20, X21, X22, X23, X24