IBM 720/720C User Manual



 300, 366, or 400MHz

1 

/ 66MHz system bus

No upgrade / processor on Ball Grid Array (H-PBGA)
128KB / onboard (full speed) / synchronous pipelined burst / ECC / write-back
External 3.5" 1.44MB / connects to left side with FDD port / includes case and cable

Option: 

 External CD-ROM / via Portable Drive Bay and 24X-10X

5

 CD-ROM UltraslimBay Drive

Option: 

 External DVD-ROM / via Portable Drive Bay and DVD-ROM UltraslimBay Drive

✂  2609-21U

✂  2609-31U

✂  2609-41U

4

 / 13ms read / Ultra DMA/33 or PIO Mode 4

12.0GB / 12ms read / ATA-66 or PIO4

7

7 

7 

June 1999 / February 2000

November 1999 / February 2000

February 2000 / February 2001

10.4" TFT color (264.16mm) / Active Matrix
SVGA / 800x600 / 15ms refresh (typical) / 50 to 110 nits
16.7 million simultaneous colors / 250 to 1 contrast (typical)
NeoMagic

 MagicMedia128XD (NM2160C) / 128-bit accelerator / DDC2B /

2MB / SGRAM (embedded) / color space conversion
Simultaneous LCD and CRT

26

 / 180 degree tilt / no multiple-monitor support / ext SVGA to 1024x768 with 65,536 colors

64MB / 192MB

33

SDRAM / non-parity / 66MHz / 3.3 volt / 64-bit
1 available socket for JEDEC 144-pin SO DIMM / std memory soldered to
motherboard / socket accessed by removing three screws and keyboard
EIDE / PCI 2.1 / supports one internal disk / customer can remove
disk for upgrade (by removing three screws on base)
Keyboard palm rest / 95% size of current standard ThinkPad keyboards /
18mm key pitch
TrackPoint



 / Press-to-Select / Release-to-Select / dragging / click pace /

sensitivity / spare caps
10.2 x 8.0  x 1.05" (86 cubic inches) / 260mm x 202mm x 26.6mm
Approximately 2.98 lbs (1.35 kg) with battery and disk
IBM ThinkPad UltraCarbon

 casing / Top: carbon-fiber reinforced plastic;

Bottom: glass-fiber reinforced plastic
Li-Ion (3 cell) / intelligent / left side

21U:

  1.9 hrs 

  31U:

 1.8 hrs     

41U:

 1.7 hrs

Optional 6 cell battery 3.8 hrs (21U) or 3.6 hrs (31U) or 3.4 hrs (41U)
3.5 hrs on / 3.0 hrs off
Intel 440DX PCIset / Intel 82371EB PIIX4M (EIDE, PCI to ISA bridge, USB)
Texas Instruments



 TI1211 PCMCIA controller / NS PC97338 (FDC, IR, I/O)

PCI 2.1 / 32-bit / 33MHz (EIDE, graphics, PCMCIA, USB, audio, modem)
ISA (diskette, serial, parallel, infrared)
None
None (all standard ports already on back of system)
1 Type I or 1 Type II / CardBus 32-bit / PCMCIA 2.1 / no Zoomed Video support
One USB / one 9 pin; 16550A / one (IEEE P1284-A, EPP, ECP, bidirectional)
APM-aware BIOS / Ultraslim AC adapter, barrel, 3-prong, 56 watts
None
None (software support for MPEG-1 in Windows 98)
56K

37

 V.90 / integrated in system / Mini PCI Type IIIb /

Lucent 1646 / not voice-capable
16-bit SoundBlaster Pro

 support / ESS 1946 / PCI / full duplex

One internal speaker (.5 watt)
Internal microphone / Fn+Insert and Fn+Delete volume control with mute
Microphone jack (mono) / headphone jack (stereo) / line-in jack (stereo)
Infrared port on right side / IrDA 1.1 compatible / up to 4Mbps
Power-on password / setup password / disk password / security keyhole
1 year - carry-in or ThinkPad EasyServ



31

 (door-to-door depot repair service)

On-site

32

, M-F, 8-5, next bus day (72 cities) / serv up to 5 yrs from purchase date

Processor
Processor features
L2 cache
Diskette drive
CD-ROM
DVD-ROM
Type-model
Processor
Disk - size / ms
Preload (see side)
Avail / withdrawn date
Display - size and type
Display - technology

Graphics - controller

Graphics - features
Memory - std / max
Memory - features

Disk controller / disk

Keyboard

Pointing

Dimensions
Weight

2

Case material

Battery - type
Battery - life

10

Charge time

10

Architecture

Docking station
Port replicator
PC Card Std slots
USB / serial / parallel
Other features
Video (TV) out
MPEG decoder
Data/fax modem

Audio
Speaker
Audio features
Audio in/out jacks
Infrared ports
Security
Limited warranty

11

Service options

15

IBM







Wired for Management 1.1a compliant
DMI 2.0 compliant
PC 98 compliant
ACPI ready (APM enabled)
Setup Guide, User's Reference, Windows

OS manual, and Quick Reference Card

System Status Indicators
Reset switch on bottom
Plug and Play 1.0a
Standby, suspend, redisafe, and

hibernation modes

ENERGY STAR compliant
International Warranty Service

14

IBM SystemXtra

, 35

24 hour / 7 day

30

 telephone, bulletin

board, fax, electronic, and Internet
(www.ibm.com/pc/us) support

No warranties are expressed or implied in this summary

(240)  

 IBM Corp. January  2001

All trademarks are the property of their respective owners

✂ = Withdrawn from marketing

- 32MB SO DIMM 3.3v NP SDRAM

76H0294

- 64MB SO DIMM 3.3v NP SDRAM

20L0241

- 128MB SO DIMM 3.3v NP SDRAM

01K1150

- 12GB disk, 12ms read, ATA-66

05K9245

- High-capacity 6-cell Li-Ion Battery

02K6580

- Ultraslim 56 watt AC Adapter (3-prong) 02K6545
- V.90 PC Card Modem with XJACK

24

10L7393

- V.90 56K PC Card Modem with

02K4196

Cellular Capability

24

- 10/100 Ethernet CardBus PC Card

08L3147

- 10/100 EtherJet plus 56K modem

37

08L3167

- Turbo 16/4 Token-Ring PC Card II

34L1401

- Smart Card Security Kit

33L5075

- IBM Portable Drive Bay (UltraslimBay) 37L1511
- Zip 100MB UltraslimBay Drive

37L1507

- SuperDisk LS-120 UltraslimBay Drive 20L1929
- DVD-ROM UltraslimBay Drive

05K8890

- 24X-10X CD-ROM UltraslimBay Drive 05K9122
- IBM MultiPort USB Hub

00N8215

- IBM ThinkPad Mobile Mouse

28L3670

16

- Microsoft



 Windows



 98 (Model 21U)

or Microsoft



 Windows



 98 Second

Edition (Model 31U and 41U)

• Online User's Guide

• ThinkPad Configuration Program

• ThinkPad Utilities

• ThinkPad on the Net

• Access ThinkPad

• IBM Update Connector

• RingCentral Fax

• IBM Registration

• IBM Global Network Dialer

• Netscape Communicator

• PC-Doctor

• ConfigSafe



• Norton AntiVirus (OEM Version)

• Universal Management Services (web)

✧Software Selections CD

✧Lotus



 SmartSuite Millennium CD

✧Recovery CD-ROM (Windows 98)

✧Recovery CD-ROM (Windows 95)

7

All models:
- C: drive is FAT16 of 2GB
- D: drive is FAT32 of remaining space

Pressing F1 during startup brings up IBM
BIOS Setup Utility

Resolution

TFT

60Hz

70Hz

75Hz

85Hz

640x480

16M 16M

--

16M

16M

800x600

16M 16M

--

16M

16M

1024x768*

64K

64K

64K

64K

   --

1280x1024

--

--

--

  --

   --

* Virtual screen mode on 10.4" LCD

- ThinkPad Proven

 solutions

12 

(visit

www.ibm.com/pc/us/thinkpad/proven)

Disks are S.M.A.R.T.

29

 compliant