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IBM Mobile				Systems	S82G-1502-03
Hardware		Maintenance		Manual
Volume	2:	ThinkPad		Computers
April	1995
We	Want	Your	Comments!
(Please		see	page	491)

This Manual Supports:

ThinkPad 340x (2610)

ThinkPad 355x (2619)

ThinkPad 360x (2620)

ThinkPad 370x (9545)

ThinkPad 700x (9552)

ThinkPad 701x (2630)

ThinkPad 720x (9552)

ThinkPad 750x (9545)

ThinkPad 755x (9545)

IBM Mobile				Systems	S82G-1502-03
Hardware		Maintenance		Manual
Volume	2:	ThinkPad		Computers
April	1995
We	Want	Your	Comments!
(Please		see	page	491)

IBM

Note

Before using this information and the product it supports, be sure to read the general information under “Notices” on page 497.

Fourth Edition (April 1995)

The following

paragraph

does

not

apply

the

United

Kingdom or any country where such provisions

are

inconsistent

with

local law:

INTERNATIONAL

BUSINESS MACHINES CORPORATION PROVIDES THIS

PUBLICATION “AS IS” WITHOUT WARRANTY OF

ANY

KIND,

EITHER

EXPRESS

IMPLIED,

INCLUDING,

BUT

NOT LIMITED TO, THE IMPLIED WARRANTIES OF

MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE. Some states do not allow disclaimer of

express or implied warranties in certain transactions,

therefore, this statement may not

apply

you.

This publication could include technical inaccuracies or

typographical

errors. Changes

are periodically

made

the

information

herein;

these

changes

will

incorporated

in new editions of the publication. IBM may make

improvements and/or changes in the product(s) and/or the

program(s)

described

this

publication

any

time.

This publication was developed for products and services

offered in the United States

America. IBM

may

not off

the products, services, or features discussed in this

document

other

countries,

and

the

information

subject

to change without notice. Consult your local IBM

representative

for

information

the

products,

services,

and

features

available

your

area.

Requests for technical information about IBM products should be made to your IBM reseller or IBM marketing representative.

Copyright International Business Machines
Corporation 1995. All	rights	reserved.
Note to U.S. Government users–Documentation related to
Restricted rights–Use, duplication,			or disclosure is subjec
to restrictions	set	forth in GSA ADP	Schedule Contract
with IBM Corp.

ii IBM Mobile Systems HMM

About	This	Manual
This	manual contains service and reference information for
IBM*	ThinkPad* computer products. Use this manual along
with the advanced diagnostic tests to troubleshoot
problems		effectively.

The manual is divided into sections as follows:

ŸThe Introduction section provides general information, guidelines, and safety information required to service computers.

ŸThe majority of the manual consists of product-specific sections that include service,

reference, and product-specific parts information.

ŸThe Common Devices Checkout section provides

procedures for testing the devices that are commonly

attached to ThinkPad computers.

ŸThe Miscellaneous Information section contains

information about	acronyms, abbreviations, terms,
and a telephone	number listing.

Important

This manual is intended for trained servicers who are familiar with ThinkPad products. Use this manual

along with the advanced diagnostic tests to troubleshoot problems effectively.

Before servicing an IBM		mobile product, be sure to
review the	safety information under “Safety Notices
(Multi-lingual	Translations)”	on page 7 and “Safety
Information” on page 14.

* Trademark of the IBM Corporation.

iii

Related Publications

The following mobile product publications are available through IBM or your IBM Authorized Dealer.

Publication								Part, Form		Number

Mobile		Systems			HMM			30H2356,		S82G-1501-01
Volume		1: Laptop,
Notebook, Portable,							and
Thinkpad		Computers

ThinkPad		700	(9552)			HMS		42G2016,		S42G-2016

ThinkPad		700	(9552)			HMR		42G2015,		S42G-2015

ThinkPad		700C		(9552)		HMS		42G2022,		S42G-2022

ThinkPad		700C		(9552)		HMR		42G2021,		S42G-2021

ThinkPad		720/720C			(9552)			61G1193,		S61G-1193
HMS

ThinkPad		720/720C			(9552)			61G1187,		S61G-1187
HMR

ThinkPad		730T		(2524)			HMM	82G5497,	S82G-5497

ThinkPad		Exp.		Crtg.			(3550)	42G2338,		S42G-2338
HMS

ThinkPad		Exp.		Crtg.			(3550)	42G2339,		S42G-2339
HMR

PS/2	FaxConcentrator*						HMS	15F2262,		S15F-2262

PS/2	FaxConcentrator						HMR	84F8541,		S84F-8541

PS/2	Comm.		Cartridge				I	10G5993,	S10G-5993
HMS

PS/2	Comm.		Cartridge				I	10G5992,	S10G-5992
HMR

IBM High Speed Internal,61G1556, S61G-1556
PCMCIA	Data/Fax				Modems

iv IBM Mobile Systems HMM

Obsolete Publications

This manual obsoletes the following publication:

Publication		Part, Form	Number

Mobile	Systems HMM	82G1502,	S82G1502
Volume	2: ThinkPad	19H1080,	S82G1502
Computers

Related Diskettes

The following diskettes are available through IBM or your

IBM Authorized Dealer.

Diskette							Part, Form		Number

ThinkPad		300		(2615)			33G9361,		S33G-9361
Advanced		Diagnostics

ThinkPad		350,		350C,		425,	A211000,		GA21-1000
425C	(2618)			Advanced
Diagnostics				Diskette

ThinkPad		500	(2603)			Adv.	71G3702,		S71G-3702
Diagnostics				Diskette

ThinkPad		510		(2604)			83G8095,	S83G-8095
Adv.	Diagnostics					Diskette

ThinkPad		700	(9552)				42G2017,		S42G-2017
Reference				Diskette

ThinkPad		700C		(9552)			42G2023,		S42G-2023
Reference				Diskette

ThinkPad		720/720C			(9552)		61G1194,		S61G-1194
Reference				Diskette

ThinkPad		750Ce		(9545)			82G3891,		S82G-3891
Hardware			Maintenance
(for	all		Models			355x,	360x,
750x,	and	755x)

ThinkPad		Dock		I		(3545)	71G4140,		S71G-4140

Docking Station					(3550)		42G2428,		S42G-2428

Data/Fax		Modem					61G1556,	S61G-1556

FaxConcentrator/A							84F8540,	S84F-8540

* Trademark of the IBM Corporation.

vi IBM Mobile Systems HMM

Contents

Introduction

. . . . . . . . . . . . . .

Portable

Computer

Descriptions. . . . . . . . . .

Drive

and

Diskette

Compatibility. .Matrix. . . . .

Important

Service

Information. . . . . . . . . . .

Safety Notices (Multi-lingual

Translations). . . . .

Safety Information

. . . . . . . . . . . .

Laser

Compliance

Statement . . . . . . . . . . .

Screw

Size

Chart. . . . . . . . . . . . . . . . .

ThinkPad

340x

(IBM

2610)

. . . . . . . . . . . .

General Checkout . . . . . . . . . . . . .

Symptom-to-FRU Index

. . . . . . . . . . . .

Service

Procedures. . . . . . . . . . . .

Product Overview . . . . . . . . . . . . .

FRU

Removals

and

Replacements. . . . . . . . .

Locations . . . . . . . . . . . . . . .

Parts Listing

. . . . . . . . . . . . . .

ThinkPad

700,

700C,

720,

720C (9552)

. . . . . .

General Checkout . . . . . . . . . . . . .

Symptom-to-FRU Index

. . . . . . . . . . . .

Service

Procedures. . . . . . . . . . . .

Product Overview . . . . . . . . . . . . .

FRU

Removals

and

Replacements. . . . . . . .

104

Locations . . . . . . . . . . . . . . .

Parts

Listing

(700). . . . . . . . . . . . . . .

115

Parts

Listing

(720,

720C). . . . . . . . . . . .

118

ThinkPad

701C/701CS

(2630)

. . . . . . . . . .

125

Checkout Guide

. . . . . . . . . . . . .

Symptom-to-FRU Index

. . . . . . . . . . . .

Service

Procedures. . . . . . . . . . .

154

Product Overview . . . . . . . . . . . . .

FRU

Removals

and

Replacements. . . . . . . .

161

Locations . . . . . . . . . . . . . . .

Parts Listing

. . . . . . . . . . . . . .

ThinkPad

355x,

360x,

370C,

750x,

755C,

755Cs

195

Read

This

First. . . . . . . . . . . . . . . . .

197

General Checkout . . . . . . . . . . . . .

Symptom-to-FRU Index

. . . . . . . . . . . .

Service

Procedures. . . . . . . . . . .

228

Product Overview . . . . . . . . . . . . .

FRU

Removals

and

Replacements. . . . . . . .

236

Removals

Models

355x,

360x. . . . . . . . . .

237

Removals

Models

370C,

750x, 755C, 755Cs . . .

261

Locations . . . . . . . . . . . . . . .

Parts Listing

. . . . . . . . . . . . . .

ThinkPad

755CD,

755CDV

(9545)

. . . . . . . .

315

General Checkout . . . . . . . . . . . . .

IBM

Corp.

1995

vii

Symptom-to-FRU Index

. . . . . . . . . . . .

Service

Procedures. . . . . . . . . . .

344

Product Overview . . . . . . . . . . . . .

FRU

Removals

and

Replacements. . . . . . . .

350

Locations . . . . . . . . . . . . . . .

Parts Listing

. . . . . . . . . . . . . .

ThinkPad

755CE,

755CSE,

755CV,

755CX

(9545)

391

General Checkout . . . . . . . . . . . . . .

Symptom-to-FRU Index

. . . . . . . . . . . .

Service

Procedures. . . . . . . . . . .

420

Product Overview . . . . . . . . . . . . .

FRU

Removals

and

Replacements. . . . . . . .

426

Locations . . . . . . . . . . . . . . .

Parts Listing

. . . . . . . . . . . . . .

Common

Devices

Checkout

. . . . . . . . . .

469

External

Diskette

Drive .Test. . . . . . . . . .

470

External

Display

Self-Test. . . . . . . . . . . .

470

External Keyboard/Auxiliary Input Device Checkout

471

Fax/Modem Checkout . . . . . . . . . . . . .

Printer Checkout

. . . . . . . . . . . . . .

Port

Replicator

Checkout. . . . . . . . . . . .

475

TrackPoint

Checkout. . . . . . . . . . . . .

476

TV Tuner . . . . . . . . . . . . . . . .

Common

Parts

Listing

. . . . . . . . . . . . .

483

Miscellaneous Information

. . . . . . .

. . . . 4

Acronyms,

Abbreviations and Terms. . . . . . .

489

Send

Your

Comments!. . . . . . . . . . . .

491

Do You

Need

Technical

References?. . . . . .

492

Problem Determination

Tips. . . . . . . . . . .

493

Phone

Numbers,

U.S.

and

Canada. . . . . . . .

494

Notices . . . . . . . . . . . . . . . .

viii IBM Mobile Systems HMM

Introduction

Portable Computer			Descriptions. . . . . . . . . .				2
Drive	and	Diskette		Compatibility. .Matrix. . . . .		4
Important		Service Information. . . . . . . . . . .					5
How	to	Use	Error Messages. . . . . . . . . .				6
How	to	Read	POST	Error	Messages. . . . . .	6
Safety Notices (Multi-lingual					Translations). . . . .	7
Safety Information				. . . . . . . . . . . .
General Safety				. . . . . . . . . . . .
Electrical Safety				. . . . . . . . . . . .
Safety		Inspection		Guide. . . . . . . . . . . .			16
Handling Electrostatic Discharge-Sensitive Devices							18
Grounding Requirements . . . . . . . . . . .
Laser	Compliance		Statement . . . . . . . . . . .				19
Screw	Size Chart. . . . . . . . . . . . . . . . . 20

Portable

Computer

Descriptions

All

models

the

following table

have VGA video. Models

N51,

CL57,

and

P70/75

and

Thinkpads

700x and 720x are

Micro

Channel*

systems. All

others *

arebus ATsystems.

Model

Type

Processor

Memory

Hrd

Dsk

Model

L40SX

8543-044

386SX-20

2M/18M

60M

Model

N45

2614-065

386SL-25

2M/8M

80M

2614-067

386SL-25

2M/8M

120M

Model

N51

SLC

8551-025

386SLC-16

2M/10M

80M

Model

N51

8551-033

386SX-16

2M/10M

40M

Model

CL57

8554-045

386SX-20

2M/16M

80M

Model

P70

386

8573-031

80386-16

2M/8M

30M

8573-061

80386-20

2M/8M

60M

8573-121

80386-20

2M/8M

120M

Model

P75

486

8573-161

80486-33

8M/16M

160M

8573-401

80486-33

8M/16M

400M

ThinkPad

300

2615-065

386SL-25

4M/12M

80M

2615-067

386SL-25

4M/12M

120M

ThinkPad

340

2610

486SLC2-50

4M/12M

125M

ThinkPad

350

2618-AOE

486SL-25

4M/20M

85M

2618-JOA

486SL-25

4M/20M

125M

2618-LOA

486SL-25

4M/20M

250M

ThinkPad

350C

2618-NOA

486SL-25

4M/20M

125M

2618-POA

486SL-25

4M/20M

250M

ThinkPad

355

2619

486SX-33

4M/16M

125M

ThinkPad

355C

2619

486SX-33

4M/16M

125M

2619

486SX-33

4M/16M

250M

ThinkPad

355Cs

2619

486SX-33

2M/16M

170M

2619

486SX-33

2M/16M

250M

ThinkPad

360

2620

486SX-33

4M/16M

170M

2620

486SX-33

4M/16M

340M

ThinkPad

360C

2620

486SX-33

4M/16M

170M

2620

486SX-33

4M/16M

340M

ThinkPad

360Cs

2620

486SX-33

4M/16M

170M

2620

486SX-33

4M/16M

340M

ThinkPad

360Ce

2620

486DX2-50/25

4M/16M

170M

2620

486DX2-50/25

4M/16M

340M

2620

486DX2-50/25

4M/16M

540M

ThinkPad

360Cse 2620

486DX2-50/25

4M/16M

170M

2620

486DX2-50/25

4M/16M

340M

2620

486DX2-50/25

4M/16M

540M

ThinkPad

360P

2620

486SX-33

4M/16M

170M

2620

486SX-33

4M/16M

340M

ThinkPad

370C

9545

486DX4-75/25

4M/32M

340M

9545

486DX4-75/25

4M/32M

540M

9545

486DX4-75/33 4M/32M

810M

ThinkPad

500

2603-081

486SLC2-50/254M/12M

80M

2603-171

486SLC2-50/254M/12M

170M

ThinkPad

510

2604

486BLC2-50/254M/20M

200M

ThinkPad

700

9552-300

486SLC-25

4M/16M

80M

9552-301

486SLC-25

4M/16M

120M

ThinkPad

700C

9552-30B

486SLC-25

4M/16M

120M

Color

Tablet

Megabyte

TPF

ThinkPad File

Pen

* Trademark of the IBM Corporation.

2 IBM Mobile Systems HMM

Model		Type	Processor	Memory			Hrd	Dsk
ThinkPad	701C	2630	486DX2-25/50				4M/32M	360MB
		2630	486DX2-25/50				4M/32M	540MB
		2630	486DX4-25/75				8M/32M	360MB
		2630	486DX4-25/75				8M/32M	540MB
ThinkPad	701Cs	2630	486DX2-25/50				4M/32M	360MB
		2630	486DX2-25/50				4M/32M	540MB
		2630	486DX4-25/75				8M/32M	360MB
		2630	486DX4-25/75				8M/32M	540MB
ThinkPad	710T	2523-09Y	486SLC2-25			4M/12M		TPF
		2523-302	486SLC2-25				4M/12M	60M
		2523-303	486SLC2-25				4M/12M	60M
ThinkPad	720	9552-307	486SLC-25/50		4M/16M			120M
		9552-308	486SLC-25/50		4M/16M			160M
ThinkPad	720C	9552-30J	486SLC-25/50		4M/16M			160M
ThinkPad	730T	2524	486SLC2-25			4M/12M		0M
		2524	486SLC2-25				4M/12M	60M
ThinkPad	750	9545-006	486SL-33		4M/20M			170M
		9545-008	486SL-33			4M/20M		340M
ThinkPad	750C	9545-306	486SL-33		4M/20M			170M
		9545-308	486SL-33			4M/20M		340M
ThinkPad	750Ce	9545	P24S-50/25		4M/20M			340M
ThinkPad	750Cs	9545	486SL-33		4M/20M			170M
		9545	486SL-33				4M/20M	340M
ThinkPad	750P	9545-40C	486SL-33		4M/20M			170M
		9545-40E	486SL-33			4M/20M		340M
ThinkPad	755C	9545	486DX4-50/25		4M/32M			170M
		9545	486DX4-50/25				4M/32M	340M
		9545	486DX4-50/25				4M/32M	540M
		9545	486DX4-75/25				4M/32M	170M
		9545	486DX4-75/25				4M/32M	340M
		9545	486DX4-75/25				4M/32M	540M
ThinkPad	755CD	9545	486DX4-100/33			8M/32M		540M
		9545	486DX4-100/33				8M/32M	810M
ThinkPad	755CDV 9545		486DX4-100/33			8M/32M		540M
		9545	486DX4-100/33				8M/32M	810M
ThinkPad	755Ce	9545	486DX4-100/33				8M/32M	340M
		9545	486DX4-100/33				8M/32M	540M
		9545	486DX4-100/33				8M/32M	810M
ThinkPad	755Cs	9545	486DX4-50/25		8M/32M			170M
		9545	486DX4-50/25				8M/32M	340M
		9545	486DX4-50/25				8M/32M	540M
		9545	486DX4-75/25				8M/32M	170M
		9545	486DX4-75/25				8M/32M	340M
		9545	486DX4-75/25				8M/32M	540M
ThinkPad	755Cse 9545		486DX4-100/33				8M/32M	340M
		9545	486DX4-100/33				8M/32M	540M
		9545	486DX4-100/33				8M/32M	810M
ThinkPad	755CV	9545	486DX4-100/33			8M/32M		540M
		9545	486DX4-100/33				8M/32M	810M
ThinkPad	755CV	9545	486DX4-100/33			8M/32M		540M
		9545	486DX4-100/33				8M/32M	810M

C	Color			T			Tablet
M	Megabyte			TPF			ThinkPad File
P	Pen

Introduction3

Drive and Diskette Compatibility Matrix

The following table provides identification information for 3.5-inch drives.

Diskette	Identifying
Drive	Mark

3.5-Inch - 1.44MB	1.44 on the eject	button
3.5-Inch - 2.88MB	2.88 on the eject button

The following	table	provides	compatibility information for
3.5-inch diskettes and 3.5-inch diskette drives.

Diskette	1.44MB		2.88MB
Capacity	Drive		Drive

1.0MB	Read/Write		Read/Write
2.0MB	Read/Write		Read/Write
4.0MB	Not	Compatible	Read/Write

The following table provides identification information for

5.25-inch diskette drives.

Diskette			Identifying
Drive			Mark

5.25-Inch	-	360KB	(External)Asterisk	on	bezel
5.25-Inch	-	1.2MB	(Internal)1.2 on	the	eject button

The	following	table	provides		compatibility	information	for
5.25-inch diskettes and 5.25-inch diskette drives.

Diskette		360KB			1.2MB
Capacity		Drive			Drive

360KB		Read/Write			Read/Write
1.2MB		Not	Compatible		Read/Write

Note:	A 360KB	diskette		written	to or formatted on a
	1.2MB	drive	can	be read reliably		only on a	1.2MB
	drive.

4 IBM Mobile Systems HMM

Important

Service

Information

Important

Diskette fixes are customer installable.

The diskette

fixes are located on the PC

Company

Bulletin Board

Service (BBS). The direct phone line for modem

connection is 919-557-0001 or tieline 255-0001.

Advise customers to contact the PC Company

HelpCenter at 800-772-2227 if they need assistance in

obtaining or installing any diskette fixes.

Customers

Canada

should

call

IBM

HelpPC at

800-565-3344

for

assistance

down-load

information.

The Canadian BBS phone numbers

are:

Montreal

514-938-3022

Toronto

905-316-4255

Vancouver

604-664-6464

Winnipeg

204-934-2735

FRU Replacement

Strategy

Before

Replacing

Parts

Ensure that all diskette fixes are installed prior to

replacing

any

FRUs

listed

this

manual.

Use the following strategy to prevent unnecessary FRU replacement and service expense:

If you

are

instructed

replace a

FRU

and

that

does

not

correct

the

problem,

reinstall

the

original

FRU

before

you continue

Some

computers

have both a processor board and a

system

board. If you are instructed

replace

eith

the

processor

board or the system board,

and the fi

board that you replaced does not correct the problem

reinstall the original board, then replace the other

(processor

system)

board.

adapter or device consists of

than

one

FRU,

error

code may be caused by any of the

FRUs. Before replacing the adapter or device,

remove the FRUs, one by one, to see

the

symptoms change. Replace only the FRU that

changed

the

symptoms.

Warning:

customized

setup

configuration

(other

than

default settings) may exist on the computer you are servicing. Running Automatic Configuration may alter

those settings. Note the current configuration settings (using the View Configuration option) and verify that the settings are in place when service is complete.

Introduction5

The	advanced diagnostic tests are intendedonly	to test
IBM	products. Non-IBM products or modified options can
give	false errors and invalid responses.

Hard Disk Drive		Replacement		Strategy:
Always	try to	run	a	low-level	format	before	replacing a har
disk	drive.
Warning:	The	drive	startup		sequence	in the	computer

you are servicing might have been changed. Be extremely careful during write operations such as copying, saving, or formatting. Data or programs can be overwritten if you select an incorrect drive.

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. The cause of th

first error code can result in false error codes being

displayed. If no	error code is displayed, see if the e
symptom is listed in the Symptom-to-FRU Index for the
computer you are	servicing.

How	to	Read	POST	Error	Messages
POST	error messages			are displayed on the screen as
three,		four,	five, or		eight digits. The error messages tha
can	be	displayed		as	shorter POST messages are

highlighted in this index. Some digits will represent different information for SCSI errors versus non-SCSI errors.

The following example shows which digits display the shorter POST error messages and also defines the SCSI information in an eight-digit error message.

Shorter POST Messages *3333-3333-3333-33330

++ + + +

*3333-3333-3333-3333-3333-3333-3333-33330 + ð + ð + ð + ð + ð + ð + ð + ð + ,3333"3333"3333"3333"3333"3333"3333"33332

+	+	+	+	+	+	+	+
Reserved	+	+	+	+	+	+	Size (SCSI)
	,3333"33332			+	+	Slot	Number (SCSI)
		Device Code		+	Logical Unit Number (SCSI)
				ID (SCSI)

All SCSI devices are set to a different SCSI ID.

Duplicate SCSI ID settings can generate	a false	error
message. Use the SCSI ID to determine	whether	the error
message is coming from an internal or an	external	device.

6 IBM Mobile Systems HMM

Safety Notices (Multi-lingual

Translations)

In this manual, safety notices

appear in English with a

page number reference to the appropriate multi-lingual,

translated

safety

notice

found

this

section.

The

following

safety

notices

are

provided

English,

French,

German,

Italian,

and

Spanish

languages.

Safety

Notice

Before the computer is powered-on after

FRU

replacement,

make

sure

all

screws,

springs,

other

small

parts

are

place

and

are not left loose inside

the

computer. Verify

this

shaking

the

computer

and

listening

for

rattling

sounds. Metallic

parts

metal flakes can cause electrical

shorts.

Avant de remettre l'ordinateur sous tension après

remplacement

d'une

unité

clientèle, vérifiez

que

tous les ressorts, vis et

autres pièces sont bien en

place et bien fixées. Pour ce faire, secouez l'unité e

assurez-vous qu'aucun bruit

suspect

produit.

Des pièces métalliques ou des copeaux de métal

pourraient causer un court-circuit.

Bevor nach einem FRU-Austausch der Computer

wieder angeschlossen wird, muß sichergestellt

werden, daß keine Schrauben, Federn oder andere

Kleinteile

fehlen

oder

Gehäuse

vergessen

wurden.

Der Computer muß geschüttelt und auf

Klappergeräusche

geprüft

werden. Metallteile

oder

-splitter können Kurzschlüsse erzeugen.

Prima di accendere l'elaboratore dopo che é stata

effettuata

sostituzione di

una

FRU,

accertarsi

che

tutte le viti, le molle e

tutte le altri parti di picco

dimensioni

siano

nella corretta

posizione

non

siano

sparse all'interno dell'elaboratore. Verificare ciò

scuotendo l'elaboratore e prestando attenzione ad

eventuali rumori; eventuali parti o pezzetti metallici

possono

provocare

cortocircuiti

pericolosi.

Antes

encender

sistema

despues

sustituir

una

FRU,

compruebe

que

todos

los

tornillos,

muelles

demás piezas

pequeñas

encuentran

sitio

no se encuentran sueltas dentro del sistema.

Compruébelo agitando el sistema y escuchando los

posibles ruidos que provocarían. Las piezas metálicas

pueden

causar

cortocircuitos eléctricos.

Introduction7

Lenovo thinkpad 340X, thinkpad 700(C), thinkpad 720(C), thinkpad 701(C, CS) Service Manual

Safety

Notice

Some

standby

batteries

contain a small amount of

nickel

and

cadmium. Do

not disassemble

it,

recharge

it, throw

into

fire

water,

short-circuit

it. Dis

of the battery as required by local ordinances or

regulations. Use only the battery in the appropriate

parts

listing. Use

an incorrect battery can result in

ignition or explosion of the battery.

Certaines

batteries

secours

contiennent

nickel

et du cadmium. Ne les démontez pas, ne les

rechargez

pas,

les

exposez

feu

l'eau.

Ne les mettez pas en

court-circuit. Pour les mettre au

rebut, conformez-vous à la réglementation en vigueur.

Lorsque

vous

remplacez

la pile de sauvegarde ou

celle de l'horloge temps réel, veillez

n'utiliser

que les

modèles cités dans la liste de pièces détachées

adéquate. Une batterie ou une pile inappropriée

risque de prendre feu ou

d'exploser.

Die Bereitschaftsbatterie, die sich unter dem

Diskettenlaufwerk befindet, kann geringe Mengen

Nickel und Cadmium enthalten. Sie darf nur durch die

Verkaufsstelle oder den IBM Kundendienst

ausgetauscht werden. Sie darf nicht zerlegt,

wiederaufgeladen, kurzgeschlossen, oder Feuer oder

Wasser ausgesetzt werden. Die Batterie kann

schwere

Verbrennungen

oder

Verätzungen

verursachen. Bei der Entsorgung die örtlichen

Bestimmungen

für

Sondermüll

beachten. Beim

Ersetzen der Bereitschaftsoder Systembatterie nur

Batterien des Typs verwenden, der in der

Ersatzteilliste aufgeführt ist. Der Einsatz falscher

Batterien

kann

Entzündung

oder

Explosion

führen.

Alcune batterie di riserva contengono una piccola

quantità di nichel e cadmio. Non smontarle, ricaricarle,

gettarle nel fuoco o nell'acqua né cortocircuitarle.

Smaltirle secondo la normativa in vigore (DPR 915/82,

successive

disposizioni

e disposizioni locali). Quando

si sostituisce la batteria dell'RTC (real time clock) o la

batteria di supporto, utilizzare soltanto i tipi inseriti

nell'appropriato Catalogo parti. L'impiego di una

batteria non adatta potrebbe determinare l'incendio o

l'esplosione

della

batteria

stessa.

Algunas baterías de reserva contienen una pequeña cantidad de níquel y cadmio. No las desmonte, ni recargue, ni las eche al fuego o al agua ni las cortocircuite. Deséchelas tal como dispone la normativa local. Utilice sólo baterías que se

encuentren en la lista de piezas. La utilización de una batería no apropiada puede provocar la ignición o explosión de la misma.

8 IBM Mobile Systems HMM

Safety Notice

The

battery

pack

contains small

amounts

nickel.

not

disassemble

it,

throw

into

fire

water,

short-circuit it. Dispose of the battery pack as

required

local

ordinances or regulations. Use only

the battery in the appropriate parts listing when

replacing

the

battery pack. Use of an incorrect batter

can

result

ignition or explosion of the battery.

batterie

contient

nickel. Ne

démontez

pas,

l'exposez

feu

à l'eau. Ne

mettez

pas

court-circuit. Pour

mettre

rebut,

conformez-vous

à la réglementation en vigueur. Lorsque vous

remplacez la batterie, veillez à n'utiliser que les

modèles cités dans la liste de pièces détachées

adéquate. En

effet,

une

batterie

inappropriée

risque

de prendre feu ou d'exploser.

Akkus enthalten geringe Mengen von Nickel. Sie

dürfen

nicht

zerlegt,

wiederaufgeladen,

kurzgeschlossen, oder Feuer oder Wasser ausgesetzt

werden. Bei der Entsorgung die örtlichen

Bestimmungen für

Sondermüll

beachten. Beim

Ersetzen der Batterie nur Batterien des Typs

verwenden,

der

Ersatzteilliste

aufgeführt

ist.

Der Einsatz falscher Batterien kann zu

Entzündung

oder

Explosion

führen.

La batteria contiene piccole quantità di nichel. Non smontarla, gettarla nel fuoco o nell'acqua né cortocircuitarla. Smaltirla secondo la normativa in vigore (DPR 915/82, successive disposizioni e

disposizioni locali). Quando si sostituisce la batteria, utilizzare soltanto i tipi inseriti nell'appropriato Catalogo parti. L'impiego di una batteria non adatta potrebbe determinare l'incendio o l'esplosione della batteria stessa.

Las baterías contienen pequeñas cantidades de
níquel. No las desmonte, ni recargue, ni						las	eche	al
fuego	o al	agua		ni las	cortocircuite.	Deséchelas		tal
como dispone		la	normativa		local. Utilice	sólo	baterías
que se encuentren en la lista de piezas al sustituir la
batería. La utilización de una batería no apropiada
puede	provocar		la	ignición o explosión		de	la misma.

Introduction9

Safety

Notice

The

lithium

battery can cause a fire,

explosion, or

severe burn. 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. Use only the battery in the

appropriate

parts

listing. Use

incorrect

battery

can

result

ignition

explosion

the

battery.

La pile de sauvegarde contient du lithium. Elle

présente des risques d'incendie, d'explosion ou de

brûlures

graves. Ne

rechargez

pas,

retirez

pas

son connecteur polarisé et ne la démontez pas. Ne

l'exposez

pas

une

temperature

supérieure

100°C,

faites

pas

brûler et

n'en

exposez

pas

contenu

à l'eau. Mettez la pile au rebut conformément à la

réglementation en vigueur. Une pile inappropriée

risque

prendre

feu

d'exploser.

Die

Systembatterie

ist eine Lithiumbatterie. Sie kann

sich entzünden, explodieren oder schwere

Verbrennungen hervorrufen. Batterien dieses Typs

dürfen

nicht

aufgeladen,

zerlegt,

über

100

erhitzt

oder verbrannt werden. Auch darf ihr Inhalt nicht mit

Wasser

Verbindung gebracht oder der zur richtigen

Polung

angebrachte

Verbindungsstecker

entfernt

werden. Bei der Entsorgung die örtlichen

Bestimmungen

für

Sondermüll

beachten. Beim

Ersetzen der Batterie nur Batterien des Typs

verwenden,

der in der Ersatzteilliste aufgeführt ist.

Der

Einsatz

falscher Batterien kann zu Entzündung

oder

Explosion

führen.

La batteria di supporto e una batteria al litio e puo

incendiarsi, esplodere o procurare gravi ustioni.

Evitare di ricaricarla, smontarne il connettore

polarizzato, smontarla, riscaldarla ad una temperatura

superiore

100

gradi

centigradi,

incendiarla

gettarla

acqua.

Smaltirla

secondo la normativa in vigore

(DPR 915/82, successive disposizioni e disposizioni

locali). L'impiego di una batteria non adatta potrebbe

determinare l'incendio o l'esplosione della batteria

stessa.

bateria

de repuesto es una bateria de litio y pue

provocar incendios, explosiones o quemaduras

graves. No la recargue, ni quite el conector

polarizado,

desmonte,

caliente

por

encima

los 100°C (212°F), ni la incinere ni exponga el

contenido de sus celdas al agua. Deséchela tal como

dispone

normativa

local.

10 IBM Mobile Systems HMM

Safety

Notice

the

LCD

breaks

and

the

fluid

from

inside

the

LCD

gets into your eyes or

your

hands,

immediately

wash the affected areas with water for at least 15

minutes. Seek

medical

care

any

symptoms

from

the

fluid

are

present

after

washing.

panneau

d'affichage

cristaux

liquides

brise

que

vous

recevez

dans

les

yeux

sur

les mains

une

partie

du fluide, rincez-les

abondamment

pendant

au moins quinze minutes. Consultez

médecin

des symptômes

persistent

après

lavage.

Die Leuchtstoffröhre im LCD-Bildschirm enthält

Quecksilber. Bei der Entsorgung die örtlichen

Bestimmungen

für

Sondermüll

beachten. Der

LCD-Bildschirm besteht aus Glas und kann

zerbrechen, wenn er unsachgemäß behandelt wird

oder der Computer auf den Boden fällt. Wenn der

Bildschirm beschädigt ist und die darin befindliche

Flüssigkeit

Kontakt mit Haut und Augen gerät,

sollten

die

betroffenen

Stellen

mindestens

Minuten

mit Wasser abgespült und bei Beschwerden

anschließend

ein

Arzt

aufgesucht

werden.

Nel caso che caso l'LCD

si dovesse rompere ed il

liquido

esso

contenuto

entrasse in contatto con gli

occhi o le mani, lavare immediatamente le parti

interessate

con

acqua

corrente

per

almeno

minuti;

poi consultare un medico se i sintomi dovessero

permanere.

LCD

rompe y el fluido de su interior entra en

contacto con sus ojos o sus manos, lave

inmediatamente

las áreas

afectadas

con

agua

durante

minutos

como

mínimo. Obtenga

atención

medica

si se presenta algún síntoma del fluido despues de

lavarse.

Introduction11

Safety Notice

To avoid shock, do not remove the plastic

cover that

surrounds

the

lower

portion

the

inverter

card.

Afin

d'éviter

tout

risque

choc

électrique, ne

retirez

pas le cache en plastique protégeant la partie

inférieure

de la

carte

d'alimentation.

Aus Sicherheitsgründen

die

Kunststoffabdeckung,

die

den

unteren Teil der Spannungswandlerplatine umgibt,

nicht

entfernen.

Per evitare scosse elettriche, non rimuovere la

copertura

plastica

che

avvolge

parte

inferiore

della

scheda

invertitore.

Para

evitar

descargas,

quite

cubierta

plástico

que

rodea

parte

baja

tarjeta

invertida.

Safety Notice 7

Though main batteries have low voltage, a shorted or grounded battery can produce enough current to burn combustible materials or personnel.

Bien que		le voltage des batteries principales soit peu
élevé, le court-circuit ou la mise à la masse d'une
batterie peut produire suffisamment de courant pour
brûler des matériaux combustibles ou causer des
brûlures		corporelles	graves.
Obwohl Hauptbatterien eine niedrige Spannung
haben,	können sie doch bei Kurzschluß			oder Erdung
genug Strom abgeben, um brennbare Materialien zu
entzünden oder Verletzungen bei Personen
hervorzurufen.
Sebbene le batterie di alimentazione siano a basso
voltaggio,		una batteria in corto circuito o a massa può
fornire corrente sufficiente da bruciare materiali
combustibili o provocare ustioni ai tecnici di
manutenzione.
Aunque	las	baterías	principales tienen	un voltaje bajo,
una batería cortocircuitada o con contacto a tierra
puede producir la corriente suficiente como para
quemar	material combustible o provocar quemaduras
en el	personal.

12 IBM Mobile Systems HMM

	Safety		Notice	8

Before			removing		any FRU, power-off the		computer,
unplug		all power			cords from electrical	outlets, remove
the battery pack, then disconnect any interconnecting
cables.
Avant de retirer une unité remplaçable en clientèle,
mettez le système hors tension, débranchez tous les
cordons d'alimentation des socles de prise de courant,
retirez la batterie et déconnectez tous les cordons
d'interface.
Die		Stromzufuhr			muß abgeschaltet, alle	Stromkabel
aus		der Steckdose gezogen, der Akku entfernt und
alle		Verbindungskabel abgenommen sein, bevor eine
FRU		entfernt		wird.
Prima di rimuovere qualsiasi FRU, spegnere il
sistema, scollegare dalle prese elettriche tutti i cavi
alimentazione, rimuovere la batteria e						poi scollegare i
cavi		di	interconnessione.
Antes de quitar una FRU, apague el sistema,
desenchufe todos los cables de las tomas de corriente
eléctrica, quite la batería y, a continuación,
desconecte cualquier cable de conexión entre
dispositivos.

Introduction13

Safety Information

The following section contains the safety information that you need to be familiar with before servicing an IBM mobile computer.

General Safety

Follow these rules to ensure general safety:

ŸObserve good housekeeping in the area of the

machines

during

and

after

maintenance.

Ÿ When

lifting

any

heavy

object:

Ensure

you

can

stand

safely

without

slipping.

Distribute the weight of the object equally

between

your

feet.

Use

slow lifting force. Never move suddenly

twist

when you attempt to lift.

Lift

standing or by pushing up with your leg

muscles; this action removes the strain from the

muscles in your backDo .not attempt to lift any

objects

that

weigh

more than

(35 lb)

objects

that

you think

are too

heavy for

you.

ŸDo not perform any action that causes hazards to the

customer, or that makes the equipment unsafe.

ŸBefore you start the machine, ensure that other

service		representatives		and the	customer's	personnel
are	not	in a	hazardous	position.
Ÿ Place	removed		covers and	other	parts in a	safe

place, away from all personnel, while you are

servicing

the

machine.

Ÿ Keep

your tool case away

from walk areas so that

other

people

will

not

trip

over it.

not

wear

loose

clothing

that can be trapped in the

moving

parts

machine. Ensure

that

your

sleeves

are fastened or rolled up

above

your

elbows. If

your

hair

long,

fasten

it.

Insert

the

ends

your

necktie

scarf

inside

cloth

or fasten it with a nonconductive clip, approximately 8

centimeters

inches)

from

the

end.

not

wear

jewelry,

chains,

metal-frame

eyeglasses,

metal

fasteners for

your

clothing.

Remember: Metal objects are good electrical conductors.

ŸWear safety glasses when you are: hammering,

drilling soldering, cutting wire, attaching springs, using

solvents, or working in any other conditions that might be hazardous to your eyes.

ŸAfter service, reinstall all safety shields, guards,

labels, and ground wires. Replace any safety device that is worn or defective.

ŸReinstall all covers correctly before returning the machine to the customer.

14 IBM Mobile Systems HMM

Electrical Safety

Observe the following rules when working on electrical equipment.

	Important
	Important
Use		only	approved tools and test equipment. Some
hand		tools		have	handles	covered	with a		soft material
that does not insulate you when working with live
electrical			currents.
Many customers have, near their							equipment, rubber
floor mats that contain small conductive fibers to
decrease electrostatic discharges. Do not use this
type		of	mat to		protect	yourself from		electrical shock.

ŸFind the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical accident occurs, you can then operate the

switch

unplug

the

power

cord

quickly.

not

work

alone under hazardous conditions or

near equipment

that

has

hazardous

voltages.

Disconnect

all power

before:

–

Performing

mechanical inspection

–

Working

near

power

supplies

–

Removing

installing

main

units

Before

you

start

work

on the machine, unplug the

power

cord.

you

cannot

unplug it, ask the customer

power-off

the

wall

box

that

supplies

power

to the

machine

and

lock

the

wall box

the

off

position.

ŸIf you need to work on a machineexposedthat has

electrical circuits, observe the following precautions:

–Ensure that another person, familiar with the power-off controls, is near you.

Remember: Another person must be there to switch off the power, if necessary.

–Use only one hand when working with

powered-on electrical equipment; keep

the

other

hand in your pocket or behind

your

back.

Remember:

There

must

a complete

circuit

cause electrical shock. By observing the above

rule, you may prevent a current from passing

through

your

body.

–

When

using

testers,

set

the controls

correctly

and use the approved probe leads and

accessories

for

that tester.

–

Stand

suitable

rubber

mats

(obtained

locally,

if necessary)

to insulate

you

from

grounds

such

as metal floor strips and machine frames.

Observe

the

special

safety

precautions

when

you

work

with

very

high

voltages;

these instructions

are in

the safety sections of maintenance information. Use

extreme

care

when

measuring

high

voltages.

Introduction15

Ÿ	Regularly inspect and maintain your						electrical	hand
	tools	for safe		operational		condition.
Ÿ	Do not	use	worn	or	broken	tools and testers.
Ÿ	Never	assume that		power has		been	disconnected
	from a circuit.checkFirst,that it has been
	powered-off.
Ÿ	Always	look	carefully		for possible		hazards in	your
	work area. Examples of these hazards are moist
	floors, nongrounded power extension cables, power
	surges, and		missing		safety	grounds.

ŸDo not touch live electrical circuits with the reflectiv

surface of a plastic dental mirror. The surface is


conductive;				such touching can cause personal injury
and	machine			damage.
Ÿ Do	not	service			the followingth partsthe power on
when	they are removed from their normal operating
places		in	a	machine:
–	Power		supply		units

–Pumps

–	Blowers			and	fans
–	Motor generators
and similar units. (This practice ensures correct
grounding			of	the units.)
Ÿ If	an		electrical			accident		occurs:
–	Use	caution;		do	not	become	a victim
	yourself.
–	Switch		off	power.
–	Send	another		person	to	get	medical	aid.

Safety Inspection Guide

The intent of this inspection guide is to assist you in

identifying potentially	unsafe conditions	on these		products.
Each machine, as it was designed and built,			had	required
safety items installed	to protect users	and	service

personnel from injury. This guide addresses only those items. However, good judgment should be used to identify potential safety hazards due to attachment of non-IBM

features		or	options not		covered by this inspection guide.
If	any	unsafe		conditions	are present, you must determine
how	serious		the	apparent	hazard could be and whether
you	can	continue		without	first correcting the problem.

Consider these conditions and the safety hazards they present:

ŸElectrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal

electrical shock).

Ÿ Explosive hazards, such as a damaged CRT face or bulging capacitor

ŸMechanical hazards, such as loose or missing hardware

16 IBM Mobile Systems HMM

The guide consists of a series of steps presented in a checklist. Begin the checks with the power off, and the power cord disconnected.

Checklist:

Check

exterior

covers

for

damage

(loose,

broken, or

sharp

edges).

2. Power-off the

computer. Disconnect

the

power

cord.

Check

the

power

cord

for:

a. A

third-wire ground connector in

good condition.

Use a meter to measure third-wire ground

continuity for 0.1 ohm or less between the

external

ground

and

frame

ground.

b. The

power

cord

should

be the

appropriate type

specified

in the

parts

listings.

Insulation must

not

frayed

worn.

Remove

the

cover.

Check

for

any

obvious non-IBM alterations. Use

good judgment as to the safety of any non-IBM

alterations.

6. Check

inside the unit for any obvious unsafe

conditions,

such

metal

filings,

contamination,

water

other

liquids,

signs

of fire or smoke damage.

Check

for

worn,

frayed,

pinched

cables.

Check

that

the

power-supply

cover

fasteners

(screws

rivets)

have

not

been

removed

tampered

with.

Introduction17

Handling Electrostatic Discharge-Sensitive Devices

Any computer part containing transistors or integrated

circuits (ICs) should be considered sensitive to electrosta discharge (ESD). ESD damage can occur when there is a difference in charge between objects. Protect against ESD


damage			by equalizing the charge so that the								machine, the
part,		the		work		mat, and	the	person	handling	the	part are a
at	the		same		charge.
Notes:
1.		Use product-specific ESD procedures when they
	exceed			the		requirements		noted	here.
2.	Make		sure that the ESD protective devices								you use
	have		been		certified		(ISO 9000)		as fully	effective.

When handling ESD-sensitive parts:

ŸKeep the parts in protective packages until they are

	inserted	into	the	product.
Ÿ	Avoid contact		with	other	people.
Ÿ	Wear a grounded wrist strap against your skin to
	eliminate	static on		your	body.

ŸPrevent the part from touching your clothing. Most

clothing

insulative

and retains a charge even when

you

are

wearing

wrist

strap.

Ÿ Use the

black

side

grounded

work

mat to provide

a static-free work surface. The mat is especially

useful

when

handling

ESD-sensitive

devices.

Ÿ Select a grounding system,

such

as those

listed

below, to provide protection that meets the specific

service

requirement.

Note:

The

use

grounding

system

is desirable

but not required to protect against ESD

damage.

– Attach the ESD ground

clip to any frame ground,

ground

braid,

green-wire

ground.

–

Use

ESD

common

ground or

reference

point

when working on a double-insulated or

battery-operated system. You can use coax or

connector-outside

shells

these

systems.

–Use the round ground-prong of the AC plug on

AC-operated computers.

Grounding Requirements

Electrical grounding of the computer is required for operator safety and correct system function. Proper grounding of the electrical outlet can be verified by a certified electrician.

18 IBM Mobile Systems HMM

Laser	Compliance		Statement
The	CD-ROM	drive in the ThinkPad computer is a laser
product. The CD-ROM drive's classification label (shown
below) is		located				on	the	drive.
	CLASS	1	LASER		PRODUCT
	LASER	KLASSE		1
	LUOKAN		1	LASERLAITE
	APPAREIL		A	LASER		DE	CLASSE	1
	KLASSE	1	LASER		APPARAT
The	CD-ROM	drive			is	certified in the U.S. to conform to

the requirements of the Department of Health and Human

Services 21 Code of Federal Regulations (DHHS 21 CFR)

Subchapter J for Class 1 laser products.

In other countries, the drive is certified to conform to requirements of EN60825.


CAUTION:
Do not open the drive; no					user	adjustments		or
serviceable		parts	are	inside.
Class 1 laser products are not considered to be
hazardous. The				CD-ROM	drive		has	an	internal Class I (1),
0.5-milliwatt,			aluminum gallium-arsenide laser							that	operates
at	a wavelength			of	760	to	810	nanometers.
The	design		of	the	laser		system and the CD-ROM drive
ensures		that there			is	no	exposure		to	laser	radiation abo
a Class 1 (1) level during normal operation, user
maintenance,			or	servicing		conditions.

Introduction19

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