IBM ThinkPad 2644 Owner's manual

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S37L-5191-00
IBM Mobile Systems
ThinkPad 570 (2644)
ThinkPad 570 UltraBase
Hardware Maintenance Manual
February 1999
IBM

Note
Before using this information and the product it
supports, be sure to read the general information
under “Notices” on page 103.
First Edition (February 1999)
The following paragraph does not apply to the United
Kingdom or any country where such provisions are
inconsistent with local law:
INTERNATIONAL BUSINESS MACHINES
CORPORATION PROVIDES THIS PUBLICATION “AS IS”
WITHOUT ANY WARRANTY OF ANY KIND, EITHER
EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED
TO, THE LIMITED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. Some states do not allow disclaimer or
express or implied warranties in certain transactions;
therefore, this statement may not apply to you.
This publication could include technical inaccuracies or
typographical errors. Changes are periodically made to
the information herein; these changes will be incorporated
in new editions of the publication. IBM may make
improvements or changes to the products or the programs
described in this publication at any time.
It is possible that this publication may contain references
to, or information about, IBM products (machines and
programs), programming, or services that are not
announced in your country. Such references or
information must not be construed to mean that IBM
intends to announce such IBM products, programming, or
services in your country.
Requests for technical information about IBM products
should be made to your IBM authorized dealer or your IBM
marketing representative.
 Copyright International Business Machines
Corporation 1999. All rights reserved. Note to U.S.
Government Users – Documentation related to restricted
rights – Use, duplication, or disclosure is subject to
restrictions set forth in GSA ADP Schedule Contract with
IBM Corp.

About This Manual
This manual contains service and reference information for
IBM ThinkPad 570Z (2644) and ThinkPad Ultrabase
products. Use this manual along with the advanced
diagnostic tests to troubleshoot problems effectively.
The manual is divided into sections as follows:
The Introduction section provides general information,
guidelines, and safety information required to service
computers.
The product-specific section includes service,
reference, and product-specific parts information.
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 ThinkPad product, be sure to
review the safety information under “Safety Notices
(Multi-lingual Translations)” on page 6 and “Safety
Information” on page 13.

Related Publications
The following product publications are available through
IBM or your IBM Authorized Dealer.
Publication Part, Form Number
Mobile Systems HMM
Volume 1: Laptop,
Notebook, Portable, and
ThinkPad Computers
(Models L40, CL57, N45,
N51, P70/P75, ThinkPad
300, 350, 500, 510, 710T,
Expansion Unit, Dock I,
Dock II)
30H2356, S82G-1501-01
Mobile Systems HMM
Volume 2: ThinkPad
Computers
(Models 340, 355, 360, 370,
700, 701, 720, 750, 755)
30H2357, S82G-1502-03
Mobile Systems HMM
Volume 3: ThinkPad
Computers
(Models 365, 380, 385, 560,
760, SelectaDock)
84H8099, S82G-1503-05
Mobile Systems HMM
Volume 4: ThinkPad
Computers
(Models 380, 385, 560, 760,
765)
05L1271, S05L-1270-01

Related Diskettes
The following diskettes are available through IBM or your
IBM Authorized Dealer.
Diskette Part, Form Number
ThinkPad 300 (2615)
Advanced Diagnostics
Diskette
33G9361, S33G-9361
ThinkPad 350, 350C, 425,
425C (2618) Advanced
Diagnostics Diskette
A211000, GA21-1000
ThinkPad 365 (2625)
Advanced Diagnostics
Diskette
76H7578, S30H-2498
ThinkPad 380/385 (2635)
Maintenance Diskette 06J0333, S06J-0333
ThinkPad 500 (2603)
Advanced Diagnostics
Diskette
71G3702, S71G-3702
ThinkPad 510 (2604)
Advanced Diagnostics
Diskette
83G8095, S83G-8095
ThinkPad 700 (9552)
Reference Diskette 42G2017, S42G-2017
ThinkPad 700C (9552)
Reference Diskette 42G2023, S42G-2023
ThinkPad 720/720C (9552)
Reference Diskette 61G1194, S61G-1194
ThinkPad Hardware
Maintenance Diskette
(for all Models 355, 360,
560, 750, 755, 760)
78H5384, S78H-5384
ThinkPad Dock I (3545) 71G4140, S71G-4140
Docking Station (3550) 42G2428, S42G-2428
Data/Fax Modem 61G1556, S61G-1556
FaxConcentrator/A 84F8540, S84F-8540

Contents
General descriptions . . . . . . . . . . . . . . . 1
Introduction . . . . . . . . . . . . . . . . . . . 3
Important Service Information ........... 3
How to Use Error Messages .......... 4
How to Read POST Error Messages ...... 4
Drive and Diskette Compatibility Matrix ....... 5
Safety Notices (Multi-lingual Translations) ..... 6
Safety Information . . . . . . . . . . . . . . . . 13
General Safety . . . . . . . . . . . . . . . . 13
Electrical Safety . . . . . . . . . . . . . . . . 14
Safety Inspection Guide ............ 15
Handling Electrostatic Discharge-Sensitive Devices 17
Grounding Requirements . . . . . . . . . . . . 17
Laser compliance statement ............ 18
Read this first ................... 20
FRU replacement notices ............. 22
LCD replacement notice ............ 22
Screw notices . . . . . . . . . . . . . . . . . 22
System board replacement notice ........ 23
Related service information ............ 25
Reset switch . . . . . . . . . . . . . . . . . 25
Running a low-level format ........... 25
Service Web site ............... 25
Passwords . . . . . . . . . . . . . . . . . . 25
Power management features .......... 28
Fn key combinations .............. 32
Checkout guide . . . . . . . . . . . . . . . . . . 33
Testing the computer ............. 33
Related service information ........... 36
Power systems checkout ............ 37
ThinkPad 570 . . . . . . . . . . . . . . . . . . 41
Product overview . . . . . . . . . . . . . . . . . 42
Specifications . . . . . . . . . . . . . . . . . 42
Status indicators . . . . . . . . . . . . . . . . 43
Structure . . . . . . . . . . . . . . . . . . . 44
Symptom-to-FRU index . . . . . . . . . . . . . . 47
Numeric error codes .............. 47
Error messages . . . . . . . . . . . . . . . . 49
Beep symptoms . . . . . . . . . . . . . . . . 50
LCD-related symptoms . . . . . . . . . . . . . 50
Intermittent problems . . . . . . . . . . . . . . 51
Undetermined problems . . . . . . . . . . . . 51
FRU removals and replacements ......... 53
1010 Battery pack . . . . . . . . . . . . . . . 55
1020 Backup battery . . . . . . . . . . . . . 56
1030 DIMM . . . . . . . . . . . . . . . . . . 58
1040 Hard disk drive ............. 59
1050 Keyboard . . . . . . . . . . . . . . . . 61
1060 Center cover . . . . . . . . . . . . . . 63
 Copyright IBM Corp. 1999 vii

1070 Modem card . . . . . . . . . . . . . . . 64
1080 Frame and power switch ......... 65
1090 Audio card . . . . . . . . . . . . . . . 67
1100 Modem jack . . . . . . . . . . . . . . . 68
1110 Speaker . . . . . . . . . . . . . . . . . 69
1120 Audio cable . . . . . . . . . . . . . . . 70
1130 PC Card slots .............. 71
1140 HDD cable . . . . . . . . . . . . . . . 72
1150 Upper shield . . . . . . . . . . . . . . 73
1160 Fan . . . . . . . . . . . . . . . . . . . 74
1170 LCD unit . . . . . . . . . . . . . . . . 75
1180 System board assembly ......... 77
1190 I/O Connector cable or system board . . . 78
2010 LCD front bezel ............. 80
2020 Inverter card . . . . . . . . . . . . . . 82
2030 LCD panel . . . . . . . . . . . . . . . 83
2040 Hinges . . . . . . . . . . . . . . . . . 86
3010 Blank bezel in the UltraBase ....... 87
Battery pack in the UltraBase .......... 88
Locations . . . . . . . . . . . . . . . . . . . . . 89
Front View . . . . . . . . . . . . . . . . . . 89
Rear View . . . . . . . . . . . . . . . . . . . 90
Bottom View . . . . . . . . . . . . . . . . . . 91
Password pads . . . . . . . . . . . . . . . . 92
Parts List (ThinkPad 570) ............. 93
LCDFRU . . . . . . . . . . . . . . . . . . . 96
Keyboard . . . . . . . . . . . . . . . . . . . 98
Common Parts List ............. 100
Notices . . . . . . . . . . . . . . . . . . . . . 103
Trademarks . . . . . . . . . . . . . . . . . 103
viii ThinkPad 570 Hardware Maintenance Manual

INTRODUCTION
General descriptions
This chapter includes descriptions for any ThinkPad model
that has the PC-Doctor DOS diagnostics program. Some
descriptions might not apply to your particular computer.
 Copyright IBM Corp. 1999 1

INTRODUCTION
2ThinkPad 570 Hardware Maintenance Manual

INTRODUCTION
Introduction
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 in Canada should call IBM HelpPC at
800-565-3344 for assistance or 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 in this manual.
Use the following strategy to prevent unnecessary FRU
replacement and service expense:
If you are instructed to 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 to replace either
the processor board or the system board, and the first
board that you replaced does not correct the problem,
reinstall the original board, then replace the other
(processor or system) board.
If an adapter or device consists of more than one
FRU, an error code may be caused by any of the
FRUs. 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.
 Copyright IBM Corp. 1999 3

INTRODUCTION
Attention
A 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.
Hard Disk Drive Replacement Strategy:
Always try to run a low-level format before replacing a hard
disk drive.
Attention
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 the
first error code can result in false error codes being
displayed. If no error code is displayed, see if the error
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 that
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
┌────┬────┬────┬────┐
│ │ │ │ │
┌────┬────┬────┬────┬────┬────┬────┬────┐
│ │ │ │ │ │ │ │ │
└────┴────┴────┴────┴────┴────┴────┴────┘
│ │ │ │ │ │ │ │
Reserved ││││││Size (SCSI)
└────┴────┘ │ │ 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.
4ThinkPad 570 Hardware Maintenance Manual

INTRODUCTION
Drive and Diskette Compatibility Matrix
The following table provides identification information for
3.5-inch drives.
Diskette
Drive Identifying 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.
The following table provides identification information for
5.25-inch diskette drives.
Diskette
Capacity 1.44MB Drive 2.88MB Drive
1.0MB Read/Write Read/Write
2.0MB Read/Write Read/Write
4.0MB Not Compatible Read/Write
Diskette
Drive Identifying 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.
Note: A 360KB diskette written to or formatted on a
1.2MB drive can be read reliably only on a 1.2MB
drive.
Diskette
Capacity 360KB Drive 1.2MB Drive
360KB Read/Write Read/Write
1.2MB Not Compatible Read/Write
Introduction 5

INTRODUCTION
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 in this section.
The following safety notices are provided in English,
French, German, Italian, and Spanish languages.
Safety Notice 1
Before the computer is powered-on after FRU
replacement, make sure all screws, springs, or other
small parts are in place and are not left loose inside
the computer. Verify this by shaking the computer
and listening for rattling sounds. Metallic parts or
metal flakes can cause electrical shorts.
Avant de remettre l'ordinateur sous tension après
remplacement d'une unité en clientèle, vérifiez que
tous les ressorts, vis et autres pièces sont bien en
place et bien fixées. Pour ce faire, secouez l'unité et
assurez-vous qu'aucun bruit suspect ne se 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 im 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 la sostituzione di una FRU, accertarsi che
tutte le viti, le molle e tutte le altri parti di piccole
dimensioni siano nella corretta posizione e 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 de encender el sistema despues de sustituir
una FRU, compruebe que todos los tornillos, muelles
y demás piezas pequeñas se encuentran en su sitio y
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.
6ThinkPad 570 Hardware Maintenance Manual

INTRODUCTION
Safety Notice 2
Some standby batteries contain a small amount of
nickel and cadmium. Do not disassemble it, recharge
it, throw it into fire or water, or short-circuit it. Dispose
of the battery as required by local ordinances or
regulations. Use only the battery in the appropriate
parts listing. Use of an incorrect battery can result in
ignition or explosion of the battery.
Certaines batteries de secours contiennent du nickel
et du cadmium. Ne les démontez pas, ne les
rechargez pas, ne les exposez ni au feu ni à 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 à 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 Bereitschafts- oder Systembatterie nur
Batterien des Typs verwenden, der in der
Ersatzteilliste aufgeführt ist. Der Einsatz falscher
Batterien kann zu 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.
Introduction 7

INTRODUCTION
Safety Notice 3
The battery pack contains small amounts of nickel.
Do not disassemble it, throw it into fire or water, or
short-circuit it. Dispose of the battery pack as
required by local ordinances or regulations. Use only
the battery in the appropriate parts listing when
replacing the battery pack. Use of an incorrect battery
can result in ignition or explosion of the battery.
La batterie contient du nickel. Ne la démontez pas,
ne l'exposez ni au feu ni à l'eau. Ne la mettez pas en
court-circuit. Pour la mettre au 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 in 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.
8ThinkPad 570 Hardware Maintenance Manual

INTRODUCTION
Safety Notice 4
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 of an incorrect battery
can result in ignition or explosion of the battery.
La pile de sauvegarde contient du lithium. Elle
présente des risques d'incendie, d'explosion ou de
brûlures graves. Ne la rechargez pas, ne retirez pas
son connecteur polarisé et ne la démontez pas. Ne
l'exposez pas à une temperature supérieure à 100°C,
ne la faites pas brûler et n'en exposez pas le contenu
à l'eau. Mettez la pile au rebut conformément à la
réglementation en vigueur. Une pile inappropriée
risque de prendre feu ou 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 C erhitzt
oder verbrannt werden. Auch darf ihr Inhalt nicht mit
Wasser in 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 ai 100 gradi centigradi, incendiarla o gettarla
in 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.
La bateria de repuesto es una bateria de litio y puede
provocar incendios, explosiones o quemaduras
graves. No la recargue, ni quite el conector
polarizado, ni la desmonte, ni caliente por encima de
los 100°C (212°F), ni la incinere ni exponga el
contenido de sus celdas al agua. Deséchela tal como
dispone la normativa local.
Introduction 9

INTRODUCTION
Safety Notice 5
If the LCD breaks and the fluid from inside the LCD
gets into your eyes or on your hands, immediately
wash the affected areas with water for at least 15
minutes. Seek medical care if any symptoms from the
fluid are present after washing.
Si le panneau d'affichage à cristaux liquides se brise
et que vous recevez dans les yeux ou sur les mains
une partie du fluide, rincez-les abondamment pendant
au moins quinze minutes. Consultez un médecin si
des symptômes persistent après le 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 in Kontakt mit Haut und Augen gerät,
sollten die betroffenen Stellen mindestens 15 Minuten
mit Wasser abgespült und bei Beschwerden
anschließend ein Arzt aufgesucht werden.
Nel caso che caso l'LCD si dovesse rompere ed il
liquido in esso contenuto entrasse in contatto con gli
occhi o le mani, lavare immediatamente le parti
interessate con acqua corrente per almeno 15 minuti;
poi consultare un medico se i sintomi dovessero
permanere.
Si la LCD se rompe y el fluido de su interior entra en
contacto con sus ojos o sus manos, lave
inmediatamente las áreas afectadas con agua durante
15 minutos como mínimo. Obtenga atención medica
si se presenta algún síntoma del fluido despues de
lavarse.
10 ThinkPad 570 Hardware Maintenance Manual

INTRODUCTION
Safety Notice 6
To avoid shock, do not remove the plastic cover that
surrounds the lower portion of the inverter card.
Afin d'éviter tout risque de 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 in plastica che avvolge la parte inferiore
della scheda invertitore.
Para evitar descargas, no quite la cubierta de plástico
que rodea la parte baja de la 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.
Introduction 11