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ThinkP ad T420 and T420i
Har dwar e Maint enance Manual
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Not e: Befor e using this information and the pr oduct it suppor ts, be sur e t o r ead the gener al information under Appendix A “Notices” on page 167 . F our th Edition (November 2011) © Copyright L enovo 2011. LIMITED AND RES TRIC TED RIGHT S NO TICE: If data or softwar e is deliver ed pursuant a Gener al Ser vices Administr ation “GSA ” contr act, use, r epr oduction, or disclosur e is subject t o r estrictions set for th in Contr act No. GS-35F-05925.
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Contents About this manual . . . . . . . . . . . iii P ower management . . . . . . . . . . . . 41 Scr een blank mode . . . . . . . . . . . 41 Chapt er 1. Safety information . . . . . . 1 Sleep (standby) mode . . . . . . . . . . 41 Gener al safety . . . . . . . . . . . . . . . . 1 Hibernation mode . . . . . . . . . . . 41 Electrical safety . . . . . . . . . . . . . . . 2 S ympt om-t o-FRU inde x . . . . . . . . . . . 43 Safety inspection guide . . . . . . . . . . . . 3 Numeric err or codes . . .
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1160 L CD unit . . . . . . . . . . . . . . . 93 F r ont view . . . . . . . . . . . . . . . . 125 1170 F an assembly . . . . . . . . . . . . . 97 Rear view . . . . . . . . . . . . . . . . . 127 1180 CPU . . . . . . . . . . . . . . . . 101 Bott om view . . . . . . . . . . . . . . . 128 1190 Base cover assembly and DC-in connect or cable . . . . . . . . . . . . . . . . . . 102 Chapt er 10. P ar ts list . . . . . . . . 129 1200 Magnesium structur e fr ame . . . . . . . 106 Over all . . . . . . . . .
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About this manual ® This manual contains ser vice and r efer ence information for the following ThinkP ad pr oducts. ThinkP ad T420 and T420i Machine T ype 4177, 4178, 4179, 4180, 4236, 4237, and 4238 Use this manual along with the advanced diagnostic t ests t o tr oubleshoot pr oblems. Impor tant: This manual is int ended only for tr ained ser vice t echnicians who ar e familiar with ThinkP ad pr oducts. Use this manual along with the advanced diagnostic t ests t o tr oubleshoot pr oblems effec
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iv ThinkP ad T420 and T420i Har dwar e Maint enance Manual
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Chapt er 1. Safety information This chapt er pr esents following safety information that you need t o be familiar with befor e you ser vice a ThinkP ad Not ebook. • “Gener al safety” on page 1 • “Electrical safety” on page 2 • “Safety inspection guide” on page 3 • “Handling devices that ar e sensitive t o electr ostatic dischar ge” on page 3 • “Gr ounding r equir ements” on page 4 • “Safety notices (multilingual tr anslations)” on page 5 • “Laser compliance stat ement (multilingual tr anslations
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Electrical safety Obser ve the following rules when working on electrical equipment. Impor tant: Use only appr oved t ools and t est equipment. Some hand t ools have handles cover ed with a soft mat erial that does not insulat e you when working with live electrical curr ents. Many cust omers have, near their equipment, rubber floor mats that contain small conductive fibers t o decr ease electr ostatic dischar ges. Do not use this type of mat t o pr ot ect yourself fr om electrical shock. • Find
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– Use caution; do not become a victim yourself. – Switch off power . – Send another person t o get medical aid. Safety inspection guide The purpose of this inspection guide is t o assist you in identifying pot entially unsafe conditions. As each machine was designed and built, r equir ed safety it ems wer e installed t o pr ot ect users and ser vice t echnicians fr om injur y . This guide addr esses only those it ems. Y ou should use good judgment t o identify pot ential safety hazar ds due t o
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Not es: 1. Use pr oduct-specific ESD pr ocedur es when they e x ceed the r equir ements not ed her e. 2. Mak e sur e that the ESD pr ot ective devices you use have been cer tified (ISO 9000) as fully effective. When handling ESD-sensitive par ts: • K eep the par ts in pr ot ective packages until they ar e inser t ed int o the pr oduct. • A void contact with other people. • W ear a gr ounded wrist str ap against your skin t o eliminat e static on your body . • P r event the par t fr om t ouching
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Safety notices (multilingual tr anslations) The safety notices in this section ar e pr ovided in the following languages: • English • Ar abic • Br azilian P or tuguese • F r ench • German • Hebr ew • Japanese • K or ean • Spanish • T r aditional Chinese D ANGER Befor e the comput er is power ed on aft er FRU r eplacement, mak e sur e all scr ews, springs, and other small par ts ar e in place and ar e not left loose inside the comput er . V erify this by shaking the comput er and list ening for r
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D ANGER If the L CD br eaks and the fluid fr om inside the L CD gets int o your eyes or on your hands, immediat ely wash the affect ed ar eas with wat er for at least 15 minut es. Seek medical car e if any sympt oms fr om the fluid ar e pr esent aft er washing. D ANGER T o avoid shock, do not r emove the plastic cover that pr ot ects the lower par t of the inver t er car d. D ANGER Though the main batt eries have low voltage, a shor t ed or gr ounded batt er y can pr oduce enough curr ent t o bu
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PERIGO Chapt er 1 . Safety information 7
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Ant es de ligar o computador após a substituição da FRU , cer tifique-se de que t odos os par afusos, molas e outr as peças pequenas est ejam no lugar e não est ejam solt os dentr o do computador . V erifique isso sacudindo o computador e pr ocur ando ouvir sons de peças soltas. P eças metálicas ou lascas de metal podem causar cur t o-cir cuit o. PERIGO Algumas bat erias r eser va cont êm uma pequena quantidade de níquel e cádmio. Não desmont e uma bat eria r eser va, r ecarr egue-a, jogue-a no
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Embor a as principais bat erias possuam baixa voltagem, uma bat eria em cur t o-cir cuit o ou at err ada pode pr oduzir corr ent e o bastant e par a queimar mat eriais de pessoal ou inflamáveis. PERIGO A menos que uma hot swap seja permitida par a a FRU que está sendo substituída, faça o seguint e ant es de r emovê-la: desligue o computador , desconect e t odos os cabos de ener gia das t omadas, r emova o pacot e de bat erias e desconect e quaisquer cabos de int er cone xão. D ANGER A vant de r
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D ANGER Si le panneau d'affichage à cristaux liquides se brise et que vous r eceve z dans les yeux ou sur les mains une par tie du fluide, rince z-les abondamment pendant au moins quinz e minut es. Consult e z un médecin si des sympt ômes persist ent apr ès le lavage. D ANGER Afin d'évit er t out risque de choc électrique, ne r etir e z pas le cache en plastique pr ot égeant la par tie inférieur e de la car t e d'alimentation. D ANGER Bien que le voltage des batt eries principales soit peu élevé
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V ORSICHT Akkus enthalt en geringe Mengen von Nick el. Sie dür fen nicht z erlegt, wieder aufgeladen, kurzgeschlossen, oder F euer oder W asser ausgesetzt wer den. Bei der Entsor gung die ör tlichen Bestimmungen für Sondermüll beacht en. Beim Ersetz en der Batt erie nur Batt erien des T yps ver wenden, der in der Ersatzt eillist e aufgeführ t ist. Der Einsatz falscher Batt erien kann zu Entzündung oder Explosion führ en. V ORSICHT Die Syst embatt erie ist eine Lithiumbatt erie. Sie kann sich ent
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W enn ein Austausch der FRU bei laufendem Betrieb nicht erlaubt ist, gehen Sie beim Austausch der FRU wie folgt vor: Schalt en Sie den Comput er aus, ziehen Sie alle Netzkabel von den Netzst eckdosen ab, entfernen Sie den Akku und ziehen Sie alle mit einander verbundenen Kabel ab. 12 ThinkP ad T420 and T420i Har dwar e Maint enance Manual
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Chapt er 1 . Safety information 13
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14 ThinkP ad T420 and T420i Har dwar e Maint enance Manual
