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Har dwar e Maint enance Manual
ThinkP ad L420, L421, and L520
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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 165 . Second Edition (April 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 . . . . . . . . . . . . 40 Scr een blank mode . . . . . . . . . . . 40 Chapt er 1. Safety information . . . . . 1 Sleep (standby) mode . . . . . . . . . . 40 Gener al safety . . . . . . . . . . . . . . . . 1 Hibernation mode . . . . . . . . . . . 41 Electrical safety . . . . . . . . . . . . . . . 2 S ympt om-t o-FRU inde x . . . . . . . . . . . 41 Safety inspection guide . . . . . . . . . . . . 3 Numeric err or codes . . . .
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1180 K eyboar d be z el . . . . . . . . . . . . 85 K eyboar d . . . . . . . . . . . . . . . . . 152 1190 L CD unit . . . . . . . . . . . . . . . 87 Miscellaneous par ts . . . . . . . . . . . . 153 2010 T op shielding assembly . . . . . . . . . 90 ac power adapt ers . . . . . . . . . . . . . 154 2020 S yst em boar d assembly . . . . . . . . . 93 P ower cor ds . . . . . . . . . . . . . . . 155 2030 USB connect or boar d and USB cable Recover y discs . . . . . . . . . . . . . . 156 assembly . . . .
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About this manual ® This manual contains ser vice and r efer ence information for the following ThinkP ad Not ebook pr oducts. ThinkP ad L420 Machine T ype (MT) 7826, 7827, 7829, 7853, 7854, and 7856 ThinkP ad L421 MT 7826, 7827, 7829, 7853, 7854, and 7856 ThinkP ad L520 MT 5015, 5016, 5017, 5019, 7859, and 7860 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
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iv 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 4 • “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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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 your clothing. Most clothing is insulative and r etains a char ge even when you ar e wearing a wrist s
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D ANGER D ANGER D ANGER D ANGER D ANGER Chapt er 1 . Safety information 5
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D ANGER 6 Har dwar e Maint enance Manual
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PERIGO PERIGO PERIGO Chapt er 1 . Safety information 7
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PERIGO PERIGO PERIGO PERIGO PERIGO 8 Har dwar e Maint enance Manual
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D ANGER D ANGER D ANGER D ANGER D ANGER Chapt er 1 . Safety information 9
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D ANGER D ANGER D ANGER V ORSICHT V ORSICHT 10 Har dwar e Maint enance Manual
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V ORSICHT V ORSICHT V ORSICHT V ORSICHT V ORSICHT V ORSICHT Chapt er 1 . Safety information 11
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Chapt er 1 . Safety information 13
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