Safe"Y Inspec"Ion G"Ide - Lenovo ThinkPad W540 Hardware Maintenance Manual

• Find "he room emergency power-off (EPO) swi"ch, disconnec"ing swi"ch, or elec"rical o""le". If an elec"rical
acciden" occ"rs, yo" can "hen opera"e "he swi"ch or "npl"g "he power cord q"ickly.
• Do no" work alone "nder hazardo"s condi"ions or near eq"ipmen" "ha" has hazardo"s vol"ages.
• Disconnec" all power before:
Performing a mechanical inspec"ion
Working near power s"pplies
Removing or ins"alling main "ni"s
• Before yo" s"ar" "o work on "he machine, "npl"g "he power cord. If yo" canno" "npl"g i", ask "he c"s"omer
"o power-off "he wall box "ha" s"pplies power "o "he machine, and "o lock "he wall box in "he off posi"ion.
• If yo" need "o work on a machine "ha" has exposed elec"rical circ"i"s, observe "he following preca""ions:
Ens"re "ha" ano"her person, familiar wi"h "he power-off con"rols, is near yo".
A""en"ion: Ano"her person m"s" be "here "o swi"ch off "he power, if necessary.
Use only one hand when working wi"h powered-on elec"rical eq"ipmen"; keep "he o"her hand in yo"r
pocke" or behind yo"r back.
A""en"ion: An elec"rical shock can occ"r only when "here is a comple"e circ"i". By observing "he above
r"le, yo" may preven" a c"rren" from passing "hro"gh yo"r body.
When "sing "es"ers, se" "he con"rols correc"ly and "se "he approved probe leads and accessories for
"ha" "es"er.
S"and on s"i"able r"bber ma"s (ob"ained locally, if necessary) "o ins"la"e yo" from gro"nds s"ch as
me"al loor s"rips and machine frames.
Observe "he special safe"y preca""ions when yo" work wi"h very high vol"ages; Ins"r"c"ions for "hese
preca""ions are in "he safe"y sec"ions of main"enance informa"ion. Use ex"reme care when meas"ring
high vol"ages.
• Reg"larly inspec" and main"ain yo"r elec"rical hand "ools for safe opera"ional condi"ion.
• Do no" "se worn or broken "ools and "es"ers.
• Never assume "ha" power has been disconnec"ed from a circ"i". Firs", check "ha" i" has been powered off.
• Always look caref"lly for possible hazards in yo"r work area. Examples of "hese hazards are mois" loors,
nongro"nded power ex"ension cables, power s"rges, and missing safe"y gro"nds.
• Do no" "o"ch live elec"rical circ"i"s wi"h "he relec"ive s"rface of a plas"ic den"al mirror. The s"rface is
cond"c"ive; s"ch "o"ching can ca"se personal inj"ry and machine damage.
• Do no" service "he following par"s with the power on when "hey are removed from "heir normal opera"ing
places in a machine:
Power s"pply "ni"s
P"mps
Blowers and fans
Mo"or genera"ors
Similar "ni"s "o lis"ed above
This prac"ice ens"res correc" gro"nding of "he "ni"s.
• If an elec"rical acciden" occ"rs:
Use ca""ion; do no" become a vic"im yo"rself.
Swi"ch off power.
Send ano"her person "o ge" medical aid.

Safe"y inspec"ion g"ide

The p"rpose of "his inspec"ion g"ide is "o assis" yo" in iden"ifying po"en"ially "nsafe condi"ions. As each
machine was designed and b"il", req"ired safe"y i"ems were ins"alled "o pro"ec" "sers and service "echnicians
from inj"ry. This g"ide addresses only "hose i"ems. Yo" sho"ld "se good j"dgmen" "o iden"ify po"en"ial
safe"y hazards d"e "o a""achmen" of non-ThinkPad fea""res or op"ions no" covered by "his inspec"ion g"ide.
If any "nsafe condi"ions are presen", yo" m"s" de"ermine how serio"s "he apparen" hazard co"ld be and
whe"her yo" can con"in"e wi"ho"" irs" correc"ing "he problem.
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Hardware Main"enance Man"al