HP 1900 Service Manual

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Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments

Index

Presario 1900 Series

Welcome to the Maintenance & Service Guide
(MSG). This online guide is designed to serve the
needs of technicians whose job it is to repair
Compaq products. The

copyright and trademark information. The

Notice contains the

Preface

shows symbol conventions, Technician Notes and
Serial Number locations on the unit.

This MSG periodically will be maintained and
updated online as needed.

Tech Support..

To report a technical problem, contact your
Regional Support Center or IM Help Center.

For the best results when printing this MSG, set
printer properties to landscape.

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Preface

This Maintenance and Service Guide is a troubleshooting guide that can be used for reference when
servicing the Compaq Presario 1900 Series Portable Computers.

Compaq Computer Corporation reserves the right to make changes to the Compaq Presario 1900
Series Portable Computers without notice. See

Notice for license and nondisclosure agreements.

Symbols

The following words and symbols mark special messages throughout this guide.

WARNING: Text set off in this manner indicates that failure to follow directions in the warning could result in bodily harm or loss of
life.

CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of data.

IMPORTANT:

Text set off in this manner presents clarifying information or specific instructions.

Text set off in this manner presents commentary, sidelights, or interesting points of

NOTE:

information.

Technician Notes

WARNING: Only authorized technicians trained by Compaq should repair this equipment. All troubleshooting and repair procedures
are detailed to allow only subassembly/module level repair. Because of the complexity of the individual boards and subassemblies,
the user should not attempt to make repairs at the component level or to make modifications to any printed circuit board. Improper
repairs can create a safety hazard. Any indications of component replacement or printed circuit board modifications may void any
warranty

Serial Number

When requesting information or ordering spare parts, the computer serial number should be
provided to Compaq. The serial number is located on the bottom of the computer.

Locating Additional Information

The following documentation is available to support this product:

● Compaq Presario 1900 Series Portable Computer documentation set

● Introducing Windows 98 Guide

● Service Training Guides

● Compaq Service Advisories and Bulletins

● Compaq QuickFind

● Compaq Service Quick Reference Guide

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications Parts Catalog

Notice

The information in this guide is subject to change without notice.

COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR
EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTAL
OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING,
PERFORMANCE, OR USE OF THIS MATERIAL.

This guide contains information protected by copyright. No part of this guide may be
photocopied or reproduced in any form without prior written consent from Compaq
Computer Corporation.

© 2000 Compaq Computer Corporation.
All rights reserved. Printed in the U.S.A.

Compaq, Presario Registered U. S. Patent and Trademark Office.

Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft Corporation.
Windows 98 is a trademark of Microsoft Corporation.

The software described in this guide is furnished under a license agreement or
nondisclosure agreement. The software may be used or copied only in accordance with
the terms of the agreement.

Product names mentioned herein may be trademarks and/or registered trademarks of
their respective companies.

Maintenance and Service Guide

Compaq Presario 1900 Series Portable Computers

First Edition (Oct. 1998)
Compaq Computer Corporation

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications

This chapter covers the following specifications of Compaq Presario 1900
Series Portable Computers:

● Physical and Environmental

● System Interrupts

● System DMA

● System I/O Addresses

● System Memory Catalog

● Display Information

● Diskette Drive

● Hard Drive

● CD ROM or DVD Drive

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications

Physical and Environmental

Presario 1900 Series

Computer Specifications

12.1 in TFT Dimensions

Height
Depth
Width

13.3 in TFT Dimensions

Height
Depth
Width

Weight

12.1 in TFT

13.3 in TFT
Wedge

1.1 in

11.6 in

9.2 in

1.2 in

11.6 in

9.2 in

4.5 lbs

5.0 lbs

1.8 lbs

U.S. Metric

234mm

294.7mm
29mm

234mm

294.7mm

30.5mm

Stand-Alone (Battery Pack) Power Requirements

Li-ion

Nominal Operating
Maximum Average
Peak Operating

AC Power Requirements

Operating Voltage
Operating Current
Operating Frequency

Maximum Transient

Temperature

Operating 50° to 95 °F 10° to 35 °C
Nonoperating -4° to 140 °F -20° to 60 °C

Relative Humidity (noncondensing)

100-240 V

0.8/0.4 A RMS
47-63 Hz
Meets IEC 801-4 and IEC801-5
1kV for 50 ns

W @ 14.4 V
W @ 14.4 V
W @ 14.4 V

Operating 10 to 90% 35°C to 90%
Nonoperating (tw = 38.7°C max) 5 to 95% 60°C to 95%

Altitude

Operating 0 to 10,000 ft 0 to 3.15 km
Nonoperating 0 to 30,000 ft 0 to 9.14 km

Shock

Operating 10 G, 11 ms, half sine
Non operating 240 G, 2 ms, half sine

Vibration

Operating 0.5 G
Nonoperating

NOTE: Applicable product safety standards specify thermal limits for plastic surfaces. Compaq
Presario 1900 Series Portable Computers operate well within this range of temperatures.

1.5 G

Next Page

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications

System Interrupts

IRQ Device(s)

Maintenance & Service Guide

Presario 1900 Series

1922, 1925, 1926, 1927, 1928, 1929, and 1930

0 System Timer
1 Standard 101/102-Key or Microsoft

Natural Keyboard
2 Programmable Interrupt Controller
3 Ambit Modem
4 Communications Port (COM1)
5 NMA2 Audio Controller
6 Standard Floppy Disk Controller
7 Printer Port (LPT1)
8 System CMOS/Real Time Clock
9 Intel 82371AB/EB PCI to USB Universal

Host Controller
10 PCI Fast Ethernet DEC 21143 Based

Adapter
11 Texas Instruments PCI-1225 CardBus

Controller

NeoMagic NMG5 Graphics Controller
12 PS/2 Compatible Mouse Port
13 Numeric Data Processor
14 Intel 82371AB/EB PCI Bus Master IDE

Controller
15 Intel 82371AB/EB PCI Bus Master IDE

Controller

Next Page

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications

System DMA

Maintenance & Service Guide

Presario 1900 Series

1922, 1925, 1926, 1927, 1928, 1929, and 1930

DMA Device(s)

0 NMA2 Audio Controller

1 NMA2 Audio Controller

2 Floppy Disk Controller

3 Parallel Port (ECP Mode)

5 Free

6 Free

7 Free

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications

System I/O Address

I/O Address System Function (Shipping Configuration)

Maintenance & Service Guide

Presario 1900 Series

0000 - 000F Direct Memory Access Controller
0020 - 0021 Programmable Interrupt Controller
0040 - 0043 System Timer
0060 - 0060 Standard 101/102-Key or Microsoft Natural Keyboard
0061 - 0061 System Speaker
0064 - 0064 Standard 101/102-Key or Microsoft Natural Keyboard
0070 - 0071 System CMOS/Real Time Clock
0081 - 008F Direct Memory Access Controller
00A0 - 00A1 Programmable Interrupt Controller
00C0 - 00DF Direct Memory Access Controller
00E0 - 00E1 Motherboard Resources
00F0 - 00FF Numeric Data Processor
0170 - 0177 Intel 82371AB/EB PCI Bus Master IDE Controller
01F0 - 01F7 Intel 82371AB/EB PCI Bus Master IDE Controller
0201 - 0201 Gameport Joystick
0274 - 0277 IO read data port for ISA Plug and Play Enumerator
0376 - 0376 Intel 82371AB/EB PCI Bus Master IDE Controller
0378 - 037F Printer Port (LPT1)
03B0 - 03BB NeoMagic NMG5 Graphics Controller
03C0 - 03DF NeoMagic NMG5 Graphics Controller
03F0 - 03F5 Standard Floppy Disk Controller
03F6 - 03F6 Intel 82371AB/EB PCI Bus Master IDE Controller
03F7 - 03F7 Standard Floppy Disk Controller
03F8 - 03FF Communications Port (COM1)
03D0 - 04D1 Motherboard Resources
0CF8 - 0CFF PCI Bus
1000 - 103F Motherboard Resources
1040 - 104F Motherboard Resources
1050 - 105F Intel 82371AB/EB PCI Bus Master IDE Controller
1060 - 107F Intel 82371AB/EB PCI to USB Universal Host Controller
1080 - 10FF PCI Fast Ethernet DEC 21143 Based Adapter
1400 - 14FF PCI Communication Device
1800 - 1807 PCI Communication Device

System Memory Catalog

Memory
Address

00000000 ­0009FFFF

000A0000 ­000AFFFF

Device

System Board Extension for PnP BIOS

NeoMagic NMG5 Graphics Controller

000B0000 ­000BFFFF

000C0000 ­000CBFFF

000E4000 ­000FFFFF

00100000 ­03FFFFFF

04000000 ­04000FFF

04001000 ­04001FFF

NeoMagic NMG5 Graphics Controller

NeoMagic NMG5 Graphics Controller

System Board Extension for PnP BIOS

System Board Extension for PnP BIOS

Texas Instruments PCI-1225 CardBus Controller

Texas Instruments PCI-1225 CardBus Controller

F4000000 ­F40000FF

F4000400 ­F40007FF

F4100000 ­F41FFFFF

F4100000 ­F47FFFFF

F4200000 ­F42FFFFF

F4400000 ­F47FFFFF

PCI Communication Device

PCI Fast Ethernet DEC 21143 Based Adapter

NeoMagic NMG5 Graphics Controller

Intel 82443BX Pentium(r) II Processor to AGP
Controller

PCI Multimedia Audio Device

NeoMagic NMG5 Graphics Controller

F4C00000 ­F4FFFFFF

F4C00000 ­F5FFFFFF

F5000000 ­F5FFFFFF

F8000000 ­FBFFFFFF

FFF80000 ­FFFFFFFF

Display Information

PCI Multimedia Audio Device

Intel 82443BX Pentium(r) II Processor to AGP
Controller

NeoMagic NMG5 Graphics Controller

Intel 82443BX Pentium(r) II Processor to PCI
Bridge (with GART support)

Motherboard Resources

12.1 in TFT
Dimensions

Height
Depth
Width

13.3 in TFT
Dimensions

Height
Depth
Width

12.1 in TFT Display

U.S. Metric

1.1 in

11.6 in

9.2"

1.2 in

11.6 in

9.2 in

234mm

294.7mm
29mm

234mm

294.7mm

30.5mm

Memory Expansion (Not Applicable in this Form Factor)

Diskette Drive

Storage Drives

Capacity per Diskette (High/Low)
Diskette Size 3.5 in

3.5 in Drive LS-120 Drive

Low 720KB
High 1.44MB

Information
Not Applicable

Number of LED Indicators

1

(Read/Write)
Number of Drives Supported 1
Drive Rotation (rpm) 360

Low 31

Transfer Rate (Kbps/Sec)

High 62

Bytes per Sector 512

Low 9

Sectors per Track (High/Low)

High 18

Access Times

3ms

Track-to-Track (ms)

15ms

Head Setting (ms)
Cylinders (High/Low) Not Available
Number of Read/Write Heads 2

Next Page

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Specifications

System I/O Address

I/O Address System Function (Shipping Configuration)

Maintenance & Service Guide

Presario 1900 Series

1922, 1925, 1926, 1927, 1928, 1929, and 1930

0000 - 000F Direct Memory Access Controller

0020 - 0021 Programmable Interrupt Controller

0040 - 0043 System Timer

0060 - 0060 Standard 101/102-Key or Microsoft Natural Keyboard

0061 - 0061 System Speaker

0064 - 0064 Standard 101/102-Key or Microsoft Natural Keyboard

0070 - 0071 System CMOS/Real Time Clock

0081 - 008F Direct Memory Access Controller

00A0 - 00A1 Programmable Interrupt Controller

00C0 - 00DF Direct Memory Access Controller

00E0 - 00E1 Motherboard Resources

00F0 - 00FF Numeric Data Processor

0170 - 0177 Intel 82371AB/EB PCI Bus Master IDE Controller

01F0 - 01F7 Intel 82371AB/EB PCI Bus Master IDE Controller

0201 - 0201 Gameport Joystick

0274 - 0277 IO Read Data Port for ISA Plug and Play Enumerator

0376 - 0376 Intel 82371AB/EB PCI Bus Master IDE Controller

0378 - 037F Printer Port (LPT1)

03B0 - 03BB NeoMagic NMG5 Graphics Controller

03C0 - 03DF NeoMagic NMG5 Graphics Controller

03F0 - 03F5 Standard Floppy Disk Controller

03F6 - 03F6 Intel 82371AB/EB PCI Bus Master IDE Controller

03F7 - 03F7 Standard Floppy Disk Controller

03F8 - 03FF Communications Port (COM1)

03D0 - 04D1 Motherboard Resources

0CF8 - 0CFF PCI Bus

1000 - 103F Motherboard Resources

1040 - 104F Motherboard Resources

1050 - 105F Intel 82371AB/EB PCI Bus Master IDE Controller

1060 - 107F Intel 82371AB/EB PCI to USB Universal Host Controller

1080 - 10FF PCI Fast Ethernet DEC 21143 Based Adapter

1400 - 14FF PCI Communication Device

1800 - 1807 PCI Communication Device

System Memory Catalog

Memory Address Device

00000000 - 0009FFFF System board extension for PnP BIOS

000A0000 - 000AFFFF NeoMagic NMG5 Graphics Controller

000B0000 - 000BFFFF NeoMagic NMG5 Graphics Controller

000C0000 - 000CBFFF NeoMagic NMG5 Graphics Controller

000E4000 - 000FFFFF System Board Extension for PnP BIOS

00100000 - 03FFFFFF System Board Extension for PnP BIOS

04000000 - 04000FFF Texas Instruments PCI-1225 CardBus Controller

04001000 - 04001FFF Texas Instruments PCI-1225 CardBus Controller

F4000000 - F40000FF PCI Communication Device

F4000400 - F40007FF PCI Fast Ethernet DEC 21143 Based Adapter

F4100000 - F41FFFFF NeoMagic NMG5 Graphics Controller

F4100000 - F47FFFFF Intel 82443BX Pentium(r) II Processor to AGP

Controller

F4200000 - F42FFFFF PCI Multimedia Audio Device

F4400000 - F47FFFFF NeoMagic NMG5 Graphics Controller

F4C00000 - F4FFFFFF PCI Multimedia Audio Device

F4C00000 - F5FFFFFF Intel 82443BX Pentium(r) II Processor to AGP

Controller

F5000000 - F5FFFFFF NeoMagic NMG5 Graphics Controller

F8000000 - FBFFFFFF Intel 82443BX Pentium(r) II Processor to PCI

FFF80000 - FFFFFFFF Motherboard Resources

Display Information

12.1 in TFT
Dimensions

Height
Depth
Width

Bridge (with GART Support)

12.1 in TFT Display

U.S. Metric

1.1 in

11.6 in

9.2 in

234mm

294.7mm
29mm

13.3 in TFT
Dimensions

Height
Depth
Width

Diskette Drive

Capacity per Diskette

1.2 in

11.6 in

9.2 in

Storage Drives

3.5 in Drive LS-120 Drive

Low 720KB

234mm

294.7mm

30.5mm

Information

(High/Low)

High 1.44MB
Diskette Size 3.5 in
Number of LED Indicators

1
(Read/Write)

Number of Drives Supported 1
Drive Rotation (rpm) 360

Low 31
Transfer Rate (Kbps/Sec)

High 62
Bytes per Sector 512

Low 9
Sectors per Track (High/Low)

High 18
Access Times

Not Applicable

Hard Drive

Track-to-Track (ms)
Head Setting (ms)

3ms

15ms
Cylinders (High/Low) Not Available
Number of Read/Write Heads 2

Hard Drives

DBCA-

DBCA-

Models
Capacity Per Drive

20648

4.8-GB 6.4-GB 10.0-GB

206480

Drive Type U-DMA/33 U-DMA/33

DCXA-

21000

U­DMA/33

Logical Configuration

Cylinders
Heads
Sectors per Track
Bytes per Sector

Seek Times

(Typical, including settling
in ms)

Single Track

Full Stroke

10068
3
63
512

Read
13ms
Write
14ms

Read

2.5ms
Write

3.0ms

13424
4
63
512

Read 13ms
Write 14ms

Read

2.5ms
Write

3.0ms
Read 23ms

Write

16383
6
63
512

Read
12ms
Write
14ms

Read

2.5ms
Write

3.0ms

Read

24ms
23ms
Write
24ms

Transfer Rate

16.6MB/s 16.6MB/s 16.6MB/s

At interface

Hard Drives, continued

MHH20

Models

MHH20 64AT

48AT

Capacity Per Drive

4.8-GB 6.4-GB 10.0-GB

Drive Type U-DMA/33 U-DMA/33
Logical Configuration

Cylinders

Not

13424

Read
23ms
Write
24ms

MHG2

102AT

U­DMA/33

16383
Heads
Sectors per Track
Bytes per Sector

Seek Times

(Typical, including settling
in ms)

Single Track

Full Stroke

Available
Not
Available
Not
Available
Not
Available

Read N/A
Write N/A

Read N/A
Write N/A

Read N/A
Write N/A

4
63
512

Read 13ms
Write 14ms

Read

2.5ms
Write

3.0ms
Read 23ms

Write

6

63

512

Read

13ms

Write

N/A

Read

1.5ms

Write

N/A

Transfer Rate

15.8MB/s 16.6MB/s 15.8MB/s

At interface

Hard Drives, continued

DK238 A-

Models

43

Capacity Per Drive

4.3 GB

Drive Type
Logical Configuration

24ms

DK228 A-65

6.4
GB(12.7mm)

Read

23ms

Write

N/A

DK239 A-

65

6.4 GB

U-

DMA/33

Cylinders
Heads
Sectors per Track
Bytes per Sector

Seek Times

(Typical, including settling
in ms)

Single Track

Full Stroke

Not
Available
Not
Available
Not
Available
Not
Available

Read N/A
Write N/A

Read N/A
Write N/A

Read N/A
Write N/A

13424
4
63
512

Read
Write

16383

6

63

512

Read

Write

N/A

Read

Write

N/A

Transfer Rate
At interface

CD ROM or DVD Drive

Models CRN-

Dimensions

Width

CD ROM Drive

(24X)

CDR-

8142B

128mm

U242Z

Not

DVD Drive (4X)

DRD-424 SD-C2202

128mm

128mm

Read

Write

N/A

Height
Depth

12.7mm
129mm

Available
Not
Available
Not
Available

Weight 300g Not

Available

Rotational
Speed

Typical
Transfer
Rate
Sustained

5000RPM Not

Available

16.67MB/s
3600KB/s

Not
Available
Not

Available
Data
Transfer
Rate

12.7mm
129mm

12.7mm
129mm

280g 270g

2300 RPM 2300RPM

16.6MB/s(PIO)
5400KB/s

16.7MB/s(PIO)
5400KB/s

Access
Time
Average

110ms Not

Available

150ms 140ms

Random
Access
Time

Spin Up
Time

Data Buffer
Capacity

5s Not

Available

1Mbit Not

Available

<15s*1 3.8s

128KB 128KB

Go back to the top of Specifications

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Presario 1900 Series

System Unit
Boards
Display

Assembly
Mass Storage

Devices
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous

This
section
provides
an
illustrated
parts
breakdown
and a
reference
for spare
parts for
the
Presario
1900
Series
Portable
Computer.

Parts
Documentation

and Software
Configure to

Order

The
computer
(1) serial
number
should be
provided to
Compaq
whenever
requesting
information
or ordering
spare
parts. The
serial
number is
located

bottom of
unit.

on

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

System Unit

Boards
Display Assembly
Mass Storage

Devices
Miscellaneous

Hardware and
Plastics Kit

Parts Catalog

System Unit

Description

1. Keyboards
331419­001

U.S.

(or)
140676-

Miscellaneous
Hardware and
Plastics Wedge Kit

Miscellaneous
Parts

Documentation
and Software

Configure to
Order

International

United
Kingdom

001
(or)
159404­001
331419­002
(or)
140676­002
(or)
159404­002
331419­031
(or)
159404­031

Asia Pacific
People's

Republic of
China

France

Latin America

Japan

331419­AA1

331419­371

331419­051
(or)
140676­051
(or)
159404­051
331419­161
331419­291
(or)
159404­291
140676­061

Italy

(or)
159404­061

2. Upper CPU Cover
w/Palmrest and
TouchPad Spare
Part No: 331423­001 or 140678-001
or 159400-001

3. Speaker Assembly
w/Cable Spare Part
No: 331420-001

4. Battery Pack - Li
ion Spare Part No:
386500-001 or
140664-001

5.

CPU Base Assembly
Enclosure with System
Board and Speaker
Assembly, (Bottom
Plastics)
Spare Part No: 331414­001 or 140671-001 or
159398-001 (model

1930)

6. CPU Base Assembly

Enclosure with Shield,
(Bottom Plastics ­Not Shown)
Spare Part No: 331421­001 or 140679-001

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Presario 1900 Series

System Unit

Boards

Display Assembly
Mass Storage

Devices
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Hardware and
Plastics Wedge Kit

Miscellaneous
Parts

Documentation
and Software

Boards

Description Spare

Part
Number

1. Processors

Pentium
II/266-MHz
w/512 Cache
Pentium
II/300-MHz
w/512 Cache
Celeron/266­MHz w/128K

400779-001

400780-001

102422-001

Configure to Order

Cache
Celeron/300­MHz w/128K
Cache
Pentium
II/333-MHz
w/256K Cache
Celeron II/333­MHz w/128
Cache
Celeron II/400­MHz w/128K
Cache
Pentium
II/300-MHz
w/512 Cache
Celeron II/300-

102268-001

107999-001 or
159864-001

140670-001

159865-001

140667-001

MHz w/128
Cache
Pentium 333
MKz w/256c
Cache
Celeron II/333
MHz w/128
Cache
Celeron II/400
MHz w/128
Cache
Pentium
II/366-MHz
w/256 Cache
Pentium
II/400-MHz
w/256 Cache

140668-001

107999-001 or
159864-001

14670-001

159865-001

159866-001

159445-001

2. Hard
Drive/Battery
Charger Board
w/RTC Battery

3. Modem
w/Shield, 56.0
Kbps Data/Fax

4. Low Voltage
Differential
Signal Board
(For 13.3'
Display Panel)

331412­001

331429­001

331411­001
or
159396­001

5. Voltage
Converter Board

6. PC Card
Assembly

7. Fan Assembly
(Not Shown)

331413­001

102123­001

331410­001 or
159403­001

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

System Unit
Boards

Display
Assembly

Mass Storage
Devices

Miscellaneous
Hardware and
Plastics Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous
Parts

Documentation
and Software

Configure to
Order

Display Panel
Assembly

Description Spare

Part
Number

Display
Panel
Assembly
w/Cable

13.3 inch
TFT

Display
Panel
Assembly
w/Cable and
Connector,

12.1 inch
TFT

331409­001 or
140666­001

331408­001 or
140665­001

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Presario 1900 Series

System Unit
Boards
Display

Assembly

Mass Storage
Devices

Miscellaneous
Hardware and
Plastics Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous
Parts

Documentation
and Software

Mass Storage
Devices

Description

1. Diskette
Drive
w/cable

1.44 MB,

3.5 inch

2. LS-120
Drive

3. Hard
Drive

Model

No.

1905,
1906,
1910,
1915,
1919
&
1920

1922
&
1925

1905,
1906,

Spare

Part

Number

331428­001

TDB

Configure to
Order

4.8-GB

6.4-GB

4.0-GB

6.4-GB

10-GB

1910,
1915,
1919,
&
1920

1905,
1906,
1910,
1915,
1919,
&
1920

1922
&
1925

331415­001

331416­001

140672­001

140673­001

140674­001

DVD Drive
w/Interface
Connector

1922
&
1925

1922
&
1925

1905,
1906,
1910,
1915,
1919,
&
1920

1922

331427­001

140682­002

&
1925

24X CD
Drive
w/cable

1905,
1906,
1910,
1915,
1919,
&
1920

102122­001

TBD

1922
&
1925

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Presario 1900 Series

System Unit
Boards
Display

Assembly
Mass Storage

Devices

Miscellaneous
Hardware
and Plastics
Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous
Parts

Miscellaneous
Hardware and
Plastics Kit

Spare Part Number:
331418-001
(Models: 1905,
1906, 1910, 1915,
1919, & 1920)

Spare Part Number:
140675-001
(Models: 1900T,
1922, 1925, 1926,
1927, 1928, 1929,

1930)

Documentation
and Software

Configure to Order

Description Quantity

1. Display

1 each
Panel
Assembly
Hinge Cover,
Left

2. Display

1 each
Panel
Assembly
Hinge Cover,
Right

3. CD/DVD

1 each
Guide Rails

4. PC Card
Placeholder

5. Display
Panel
Assembly
Hinge Frame
(Left and
Right)

6.
Heatspreader
with Thermal
Pad

12.1 inch
FPC Support

1 each

1 each

2 each

1 each
Bracket

(Not Shown)
Keyboard

Eject Latch
(Not Shown)

TouchPad
Switch (Not
Shown)

Scroll Button
Switch (Not
Shown)

Battery Eject
Latch (Not

1 each

1 each

1 each

1 each
Shown)

Display
Screw Hole
Covers
(Not Shown)

Battery Knob
Spring Coil
(Not Shown)

Volume
Switch Knob
(Not Shown)

Display Eject
Latch (Not

4 each

2 each

1 each

1 each
Shown)

RJ11 Jack
Assembly
(Not Shown)

Rubber Feet
(Not Shown)

1 each

2 each

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Presario 1900 Series

System Unit
Boards
Display

Assembly
Mass Storage

Devices

Miscellaneous
Hardware
and Plastics
Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous
Parts

Miscellaneous Hardware
and Plastics Wedge Kit

Spare Part Numbers:
331424-001
(Models: 1905, 1906,
1910, 1915, 1919, &

1920)

Spare Part Numbers:
140680-001
(Models: 1900T, 1922,
1925, 1926, 1927,
1928, 1929, 1930)

Description Quantity

Documentation
and Software

Configure to
Order

1. Diskette
Drive Shield

2. Alignment
Pins (Left and
Right)

3. DVD Drive
Shield

4. Eject
Mechanism
Assembly
w/Springs
(Left and
Right)

1 each

2 each

1 each

2 each

5. Rubber
Feet

6. Wedge to
Port
Replicator
Interface
Board

7.
Reinforcement
Bracket

Top and
Bottom
Wedge Cover
(Not Shown)

4 each

1 each

1 each

331425­001

System to

1 each
Wedge
Interface
Board

Eject Plunger

2 each
Knobs (Not
Shown)

Plunger

2 each
Spring Coil
(Not Shown)

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Presario 1900 Series

System Unit
Boards
Display

Assembly
Mass Storage

Devices
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous
Parts

Documentation
and Software

Configure to
Order

Miscellaneous Parts

Description Spare

Part
Number

1. AC 45W
Adapter

2. Integrated
10/100BaseT
Ethernet Port
Replicator

Miscellaneous
Screw Kit
(Not Shown)

358976­001

331407­001 or
140663­001

331422­001
or
159399­001

Y Cable
Assembly
(Not Shown)

102422­001

Maintenance & Service Guide

117894-001 US/PR

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Documentation and Software

Presario 1900 Series

System Unit
Boards
Display

Assembly
Mass Storage

Devices
Miscellaneous

Hardware and
Plastics Kit

Miscellaneous
Hardware and
Plastics Wedge
Kit

Miscellaneous
Parts

Documentation
and Software

Configure to
Order

Description Spare Part Number

Quick Restore CD 1

US/PR
Mexico
APD
PRC
Korea
AUS
Japan
UK
France
Italy
Belgium

122314­001
122314­161
122314­371
122314­AA1
122314­AD1
122314­371
122314­291
122314­031
122314­051
122314­061
122314­AK1

Quick Restore CD 2

Reference Guide

Quick Reference Guide

QuickFind for Windows, North America, Latin America, Asia

Belgium

Not Available

Not Available

122314­KK1

Pacific
QuickFind for Windows, Europe, Middle East, Africa Not Available

QuickFind is updated monthly. To complete the QuickFind part number, add the
suffix from the table below for the desired month. If you do not specify the 3­digit suffix, the default is the current month in which the order is placed.

QuickFind Part Number Suffix

Suffix Month Suffix Month

-001 January -007 July

-002 February -008 August

-003 March -009 September

-004 April -010 October

-005 May -011 November

-006 June -012 December

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Illustrated Parts Catalog

Configure To Order Features

Compaq Presario 1900T Portable Computer Configure To Order Features

Processors

Celeron 400 w/DC/BGA
Pentium II 400 w/256 Cache
Pentium II 366

System Memory

66MHz 128 (64down + 64up)
66Mhz 192 (64down + 128up)
66Mhz 96 (64down + 32up)

Diskette Drive

Standard 3.5" Floppy
LS-120 Super Drive

CD-ROM 24X

4X DVD

Hard Drive

4.8-GB

6.4-GB

10.0-GB

Miscellaneous

Miscellaneous over pack
POD Label

Software
Other CTO Options

Microsoft Office 2000 Professional Bundled CD
AC Adapter

Briefcase
External Zip
Folio Case
Extra SLilon for Presario 1900T
Port Replicator
Security Lock
Xircom 10/100 NIC

Back to Models and Features

Back to Illustrated Parts Catalog

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit
Left Side

and Top
Wedge
Components

Models and Features

Compaq Discovery 1900 Series Portable Computer

Models

Display
Processor

Hard Drive

Model
1900T

12. 1" TFT or 13.3" 12. 1" TFT
Intel Celeron/400-

MHz
w/128K Cache
or
Pentium II/366-MHz
w/256 Cache
or
Pentium II/400-MHz
w/256 Cache

4.8-GB or 6.4-GB or

Model
1905 and 1906

Intel Celeron/266­MHz
w/128K Cache

4.0-GB

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

<

Port
Replicator
Components

Power
Management

Modem

CD Drive

Display

Processor

10.0-GB

56.0 Kbps PCI
Data/Fax

6X-DVD or 24X CD­ROM

Model
1910

12.1" TFT or 13. 3"
TFT

Intel Celeron/300­MHz
w/128K Cache or
PII/300-MHz w/512

56.0 Kbps PCI
Data/Fax

24X CD-ROM

Model
1915

12. 1" TFT or 13.3"
TFT

Pentium II/266-MHz
w/512K or 256K
Cache or PII/300­MHz w/512 Cache

Hard Drive
Modem

DVD or CD
Drive

Display

Cache

4.8-GB or 6.4-GB 4.0-GB

56.0 Kbps PCI
Data/Fax or 56.0
Kbps PCI Data/Fax I

56.0 Kbps PCI
Data/Fax or

56.0 Kbps PCI
Data/Fax
(International)

24X CD Drive or 4X
DVD

Model
1919 and 1920

DVD or 24X CD
Drive

Model
1922 and 1925

13. 3" TFT 12.1" TFT or 13. 3"
TFT

Processor

Hard Drive
Modem

Intel Celeron/300­MHz
w/128K Cache
or
Pentium II/300-MHz
w/256K Cache

Intel Celeron/300­MHz
w/512K Cache or
Intel Celeron/333­MHz
w/128K Cache or
Intel
Celeron/400(128)
w/DC or
Pentium II/333-MHz
w/256K Cache

4.0-GB or 6.4-GB 4.8-GB or 6.4-GB

K-56.0 Kbps PCI
Data/Fax or

56.0 Kbps PCI

56.0 Kbps PCI
Data/Fax or
International

Data/Fax or

DVD Drive

56.0 Kbps PCI

Data/Fax
(International)

DVD Drive DVD Drive or 24X CD-

ROM

Next Page

Maintenance & Service Guide

Presario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Models and Features

Models and
Features

Status Panel
Left Side

Components

Right Side
Components

Bottom of
Unit

Left Side
and Top
Wedge
Components

Right Side
Wedge
Components

Rear
Connectors

Port

Compaq Discovery 1900 Series Portable Computer

Models

Model
1926, 1927, and

Model
1929 and 1930

1928

Display

12. 1" TFT or 13.3

13. 3" TFT

TFT

Processor

Intel Celeron/400­MHz
w/128K Cache
or
Pentium II/333-MHz
w/256K Cache

Pentium II/366-MHz
w/256K Cache
or
Intel Celeron/400­MHz w/128K Cache
or
Intel Celeron/433­MHz w/128K Cache

Hard Drive
Modem

4.8-GB or 6.4-GB 4.8-GB or 6.4-GB

56.0 Kbps PCI
Data/Fax

56.0 Kbps PCI
Data/Fax or
International

CD Drive

4X DVD or 24X CD-

4X DVD

ROM

Replicator
Connectors

Port
Replicator
Components

Power
Management

Configure To Order Features (CTOs)

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls
and Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit
Left Side

and Top

Controls and Lights

Front of Unit

1. Display 9. TouchPad

2.
Backlight
Switch
Button

3.Instant
Internet
Access
Button

4.Instant
Search
Button

10. Left
TouchPad
Button

11. Power
(On/Off)
Light

12. Scroll
(Up/Down)
Button

Wedge
Components

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power

5. Power
(On/Off)
Button

6. Instant
E­Commerce
(or
Favorite
Web site)
Button

7. Instant
E-Mail
Button

8.
Keyboard

13. Battery
Charge Light

14. Display
Panel Release
Button

15. Right
TouchPad
Button

16.Integrated
Speakers

Management

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel

Left Side
Components

Right Side
Components

Bottom of
Unit

Left Side
and Top
Wedge
Components

Right Side

Status
Panel
Lights

1. AC
Adapter
Light

2. Num
Lock
Light

3. Caps
Lock
Light

4. Scroll
Lock
Light

Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel

Left Side
Components

Right Side
Components

Bottom of
Unit

Left Side and
Top Wedge
Components

Left Side
Components

1. Security
Lock

2. Air Vent

3. PC Card
Slots

4. PC Card
Eject Levers

5. Hard Drive

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components

Right Side
Components

Bottom of
Unit

Left Side and
Top Wedge
Components

Right Side
Components

1. Battery
Compartment

2. Volume
Up/Down
Button

3. Headphone
Jack

4. Microphone
Jack

5. Air Vent

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components

Bottom of
Unit

Left Side
and Top
Wedge

Bottom
of Unit

1. Wedge
Interface
Connector

2.
Keyboard
Eject
Switch

3. Battery
Release
Lever

Components
Right Side

Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit

Left Side
and Top
Wedge
Components

Wedge
Components

Left Side and

Top

Components

of the

Removable

Drive Wedge

1. DVD Drive
or CD ROM
Drive

2. Wedge
Release Button

3. System to
Wedge

Interface

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

Connector

4. Alignment

Pins

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit
Left Side and

Top Wedge

Wedge
Components

Right Side
Components of
the Removable

Drive Wedge

1. Wedge
Release
Button

2. Diskette
Drive or LS­120 Drive
Slot

Components

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management

3. Diskette
Drive or LS­120 Drive
Eject
Button

Maintenance & Service Guide

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Product Description

Presario 1900 Series

Models and
Features

Controls and
Lights

Status Panel
Left Side

Components
Right Side

Components
Bottom of

Unit
Left Side

and Top
Wedge
Components

Rear
Connectors

1. Modem Jack

2. USB Port

3.
Keyboard/Mouse
Port

4. Serial Port

5. Parallel Port

6. External
Monitor Port

7. AC Adapter

Right Side
Wedge
Components

Rear
Connectors

Port
Replicator
Connectors

Port
Replicator
Components

Power
Management