IBM Thinkpad T20 T21 T22 T23 Manual

3020 ThinkPad Dock top cover
NoteThis section is only for the ThinkPad Dock (FRU no.
08N1546). The top cover and screw kit for ThinkPad
Dock (FRU no. 12P4143) is not available for the
ThinkPad Dock with extension plate (FRU no.
08N1537) .
1
(Rear view)
Step Screw (quantity) Torque

1M2.5×4.8 mm (2) 0.392 Nm
(4 kgfcm)
(continued)
Removing and replacing a FRU
ThinkPad T20, T21, T22 and T23 series135 

2
2
2
(Bottom view)
Step Screw (quantity) Torque

2M2.5×4.8 mm (8) 0.392 Nm
(4 kgfcm)
(continued)
Removing and replacing a FRU
136ThinkPad T20, T21, T22, T23 (MT 2647/2648) 

Make sure that the system lock keyAis set to the Unlock
position. Release the front latches in step
3, and then
remove the top cover
4. For step
5, see the inside
view, shown in the circle.
54
3A
Removing and replacing a FRU
ThinkPad T20, T21, T22 and T23 series137 

When replacing the top cover, do the following:
vMake sure that the springs are placed correctly.
vMake sure that the device release lever is seated
correctly.
(continued)
Removing and replacing a FRU
138ThinkPad T20, T21, T22, T23 (MT 2647/2648) 

vMake sure that the release button works correctly.
Removing and replacing a FRU
ThinkPad T20, T21, T22 and T23 series139 

Locations
Front view

1System status indicators

2Power switch

3Battery, standby mode, and Ultrabay status
indicators

4Bay latch

5Eject button

6Ultrabay 2000 device
Note:The Ultrabay 2000 accepts storage devices,
such as a DVD drive or a CD-ROM drive.

7TrackPoint pointing stick

8TrackPoint buttons

9ThinkPad button

10Volume and mute buttons
1
2
3
4
5
6
7
8
9
10
Locations
140ThinkPad T20, T21, T22, T23 (MT 2647/2648) 

Rear view

1Security keyhole

2TV-out connector

3Serial connector

4Parallel connector

5External-monitor connector

6Modem connector

7Ethernet connector

8Power jack

9Universal serial bus (USB) connector
Note:T23 series have two USB connectors.

10External-input-device connector
11098765432
Locations
ThinkPad T20, T21, T22 and T23 series141 

Bottom view

1Built-in stereo speakers

2Battery pack

3Battery pack latches

4Docking connector

5Mini PCI card slot

6DIMM

7PC card slots

8PC card eject button

9Infrared port

10Stereo headphone jack

11Stereo line-in jack

12Microphone jack

13Hard-disk drive

14LCD latches
234
5
6
8
7
9
10
11
12
13
14
1
Locations
142ThinkPad T20, T21, T22, T23 (MT 2647/2648) 

Parts list
T20, T21, T22 and T23 series model
matrix
The T20, T21, T22 and T23 series includes several
models. The following table summarizes the characteristics
of each model, to help you determine which FRU in the
part list meets your need.
Model CPU Bay
deviceMini PCI
adapterLCD HDD
T20 (Memory: 128 MB) (*): Memory 64 MB
(**): Memory 256 MB
2647-21x, 61x CMG
650CD-
ROMModem 13.3-in.
XGA6GB
2647-24x, 64x Combo
(Intel)
2647-A1x—— —
2647-31x DVD-
ROM
(6x)Modem 14.1-in.
XGA6GB
2647-2EY CD-
ROMCombo...

Model CPU Bay
deviceMini PCI
adapterLCD HDD
T21 (Memory: 128 MB)
2647-27x, 67x CMG
750CD-
ROMModem 13.3-in.
XGA10 GB
2647-2Ax, 6Ax Combo
(Xircom)
2647-4Bx, 8Bx Combo
(3Com)
2647-47x, 49x,
87x, L7xCMG
800DVD-
ROM
(8x)Modem 14.1-in.
XGA20 GB
2648-47x, 87x
2647-4Ax, 8Ax Combo
(Xircom)
2648-4Ax, 8Ax Combo
(Intel)
2647-4Bx, 8Bx Combo
(3Com)
2648-4Bx, 8Bx
2647-57x, 97x CMG
850Modem 14.1-in.
SXGA+32 GB
2647-5Ax, 9Ax Combo
(Xircom)
2647-5Bx, 9Bx Combo
(3Com)
T22 (Memory: 128 MB)
2647-3Cx, 7Cx CMG
800CD-
ROMModem...