Lenovo MT 1842 User manual

ThinkPad Computer

Hardware Maintenance Manual

July 2005

This manual supports:

ThinkPad R50e Series

ThinkPad Dock II (MT 2877)

(MT 1834, 1842, 2670)

ThinkPad R52 Series

(MT 1846, 1847, 1848, 1849, 1850,

1858, 1859, 1860, 1861, 1862,

1863, 1870)

Note

Before using this information and the product it

supports, be sure to read the general information

under “Notices” on page 245.

First Edition (July 2005)

©Copyright Lenovo 2005.

Portions ©Copyright International Business Machines

Corporation 2005.

U.S. GOVERNMENT USERS –RESTRICTED RIGHTS:

Our products and/or services are provided with

RESTRICTED RIGHTS. Use, duplication or disclosure by

the Government is subject to the GSA ADP Schedule

contract with Lenovo Group Limited, if any, or the standard

terms of this commercial license, or if the agency is unable

to accept this Program under these terms, then we provide

this Program under the provisions set forth in Commercial

Computer Software–Restricted Rights at FAR 52.227-19,

when applicable, or under Rights in Data-General, FAR

52.227.14 (Alternate III).

Contents

About this manual ...........1

Introduction .............3

Important service information .........3

Strategy for replacing FRUs .........3

Strategy for replacing ahard disk drive .....4

How to use error messages ........4

Strategy for replacing FRUs for CTO, CMV, and GAV 4

Product definition ...........4

FRU identification for CTO, CMV, and GAV products 5

Important information about replacing RoHS compliant

FRUs ...............7

Diskette compatibility matrix .........8

Safety notices: multilingual translations ......8

Safety information............20

General safety ............20

Electrical safety ...........21

Safety inspection guide .........23

Handling devices that are sensitive to electrostatic

discharge ............24

Grounding requirements .........25

Laser compliance statement.........26

General descriptions ..........29

Read this first .............29

What to do first ...........29

Related service information .........31

Service Web site ...........31

Restoring the pre-installed system ......31

Passwords .............32

Power management ..........35

Checkout guide ............38

Testing the computer ..........38

Detecting system information with PC-Doctor...41

Power system checkout .........41

ThinkPad R50e and R52 Series .......45

Product overview ............47

Specifications ............47

Status indicators ...........52

FRU tests .............55

Fn key combinations ..........57

Symptom-to-FRU index ..........59

Numeric error codes ..........59

Error messages ...........63

Beep symptoms ...........64

No-beep symptoms ..........64

LCD-related symptoms .........65

Intermittent problems ..........66

Undetermined problems .........66

©Lenovo 2005. Portions ©IBM Corp. 2005. iii

FRU replacement notices .........67

Screw notices ............67

Retaining serial numbers.........68

Removing and replacing aFRU........71

1010 Battery pack...........72

1020 Ultrabay Enhanced device (for R52 series) 73

1030 Hard disk drive ..........75

1040 DIMM (optional) .........77

1050 Keyboard ...........78

1060 Ultrabay device (for R50e series) ....82

1070 DIMM (standard) .........83

1080 Modem daughter card (MDC-2) .....84

1090 Bluetooth/Modem daughter card (BMDC-3)

(for R52 series) ..........86

1100 Keyboard bezel ..........88

1110 Touch pad and Fingerprint reader (for R52

series) .............92

1120 Mini PCI adapter .........95

1130 Fan assembly ..........99

1140 CPU............. 100

1150 Backup battery ......... 101

1160 Speaker assembly ........ 102

1170 IEEE 1394 (for R52 series) ...... 104

1180 PC Card slot assembly ....... 107

1190 Ultrabay Enhanced shield kit .....110

1200 LCD assembly..........117

1210 VGA and Ultrabay Enhanced device eject

button cable ........... 121

1220 System board, interposer card, and base

cover ............. 124

2010 LCD front bezel ......... 131

2020 Inverter card .......... 133

2030 LCD panel, LCD cable assembly, wireless

LAN antenna assembly, hinges, and LCD cover. 134

3010 ThinkPad Dock II PCI cover...... 145

3020 ThinkPad Dock II top cover ...... 146

Locations .............. 149

Front view (for R50e) ......... 149

Rear view (for R50e) ......... 150

Bottom view (for R50e) ......... 151

Front view (for R52) .......... 152

Rear view (for R52) .......... 154

Bottom view (for R52) ......... 155

Parts list .............. 156

Overall ............. 156

LCD FRUs ............ 209

AC adapters ............ 225

Keyboard ............. 226

Recovery CDs ........... 228

Miscellaneous parts .......... 235

Optional FRUs ........... 241

Common parts list .......... 242

Notices .............. 245

iv R50e and R52 Series

Trademarks ............. 247

Contents v

vi R50e and R52 Series

About this manual

This manual contains service and reference information for

ThinkPad R50e series (MT 1834, 1842, 2670), R52 series

(MT 1846, 1847, 1848, 1850, 1858, 1859, 1860, 1861,

1862, 1863, 1870), and ThinkPad Dock II (MT2877)

products. Use this manual along with the advanced

diagnostic tests to troubleshoot problems.

Note

MT 1850, 1862, 1863, and 1870 are special bids.

For information on how to locate service parts, refer

to “Strategy for replacing FRUs for CTO, CMV, and

GAV” on page 4.

The manual is divided into sections as follows:

vThe common sections provide general information,

guidelines, and safety information required in servicing

computers.

vThe product-specific section includes service, reference,

and product-specific parts information.

Important

This manual is intended for trained service

personnel who are familiar with ThinkPad products.

Use this manual along with the advanced diagnostic

tests to troubleshoot problems effectively.

Before servicing aThinkPad product, be sure to

review the safety information under “Safety notices:

multilingual translations” on page 8, “Safety

information” on page 20, and “Laser compliance

statement” on page 26.

©Lenovo 2005. Portions ©IBM Corp. 2005. 1

2R50e and R52 Series

Introduction

Important service information

Important

BIOS and device driver fixes are

customer-installable. The BIOS and device drivers

are posted on the customer support site

http://www.lenovo.com/think/ support

Advise customers to contact the Customer Support

Center at 800-426-7378 if they need assistance in

obtaining or installing any diskette fixes.

Customers in Canada should call the Customer

Support Center at 800-565-3344 for assistance or

download information.

Strategy for replacing FRUs

Before replacing parts

Make sure that all diskette fixes are installed before

replacing any FRUs listed in this manual.

Use the following strategy to prevent unnecessary expense

for replacing and servicing FRUs:

vIf you are instructed to replace aFRU but the

replacement does not correct the problem, reinstall

the original FRU before you continue.

vSome computers have both aprocessor board and a

system board. If you are instructed to replace either the

processor board or the system board, and replacing one

of them does not correct the problem, reinstall that

board, and then replace the other one.

vIf an adapter or adevice consists of more than one

FRU, any of the FRUs may be the cause of the error.

Before replacing the adapter or device, remove the

FRUs, one by one, to see if the symptoms change.

Replace only the FRU that changed the symptoms.

Attention: The setup configuration on the computer you

are servicing may have been customized. Running

Automatic Configuration may alter the settings. Note the

current configuration settings (using the View Configuration

option); then, when service has been completed, verify that

those settings remain in effect.

©Lenovo 2005. Portions ©IBM Corp. 2005. 3

Strategy for replacing ahard disk drive

Always try to run alow-level format before replacing ahard

disk drive.

Attention: The drive startup sequence in the computer

you are servicing may have been changed. Be extremely

careful during write operations such as copying, saving, or

formatting. If you select an incorrect drive, data or

programs can be overwritten.

How to use error messages

Use the error codes displayed on the screen to diagnose

failures. If more than one error code is displayed, begin the

diagnosis with the first error code. Whatever causes the

first error code may also cause false error codes. If no

error code is displayed, see whether the error symptom is

listed in the Symptom-to-FRU Index for the computer you

are servicing.

Strategy for replacing FRUs for CTO,

CMV, and GAV

Product definition

Dynamic Configure To Order (CTO)

This provides the ability for acustomer to configure an

IBM

solution from an eSite, and have this configuration

sent to fulfillment, where it is built and shipped directly to

the customer. The machine label, PC Entitlement

Warehouse (PEW), eSupport, and the HMM will load these

products as the 4-digit MT and 3-digit model, where model

=“CTO” (Example: 1829-CTO).

Custom Model Variant (CMV)

This is aunique configuration that has been negotiated

between IBM and the customer. Aunique 4-digit MT and

3-digit model is provided to the customer to place orders

(Example: 1829-W15). ACMV is aspecial bid offering.

Therefore, it is NOT generally announced.

vThe MTM portion of the machine label is the 4-digit MT

and 3-digit model, where model =“CTO” (Example:

1829-CTO). The PRODUCT ID portion of the machine

label is the 4-digit MT and 3-digit CMV model (Example:

1829-W15).

vThe PEW record is the 4-digit MT and 3-digit model,

where model =“CTO” (Example: 1829-CTO).

veSupport will show both the CTO and CMV machine

type models (Example: 1829-CTO and 1829-W15 will be

found on the eSupport site.)

Important service information

4R50e and R52 Series

This manual suits for next models

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