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Safety inspection guide, Safety, Inspection – Lenovo Z61e User Manual

Page 21: Guide

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v

Do

not

service

the

following

parts

with

the

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.)

v

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

purpose

of

this

inspection

guide

is

to

assist

you

in

identifying

potentially

unsafe

conditions.

As

each

machine

was

designed

and

built,

required

safety

items

were

installed

to

protect

users

and

service

personnel

from

injury.

This

guide

addresses

only

those

items.

You

should

use

good

judgment

to

identify

potential

safety

hazards

due

to

attachment

of

non-ThinkPad

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:

v

Electrical

hazards,

especially

primary

power

(primary

voltage

on

the

frame

can

cause

serious

or

fatal

electrical

shock)

v

Explosive

hazards,

such

as

a

damaged

CRT

face

or

a

bulging

capacitor

v

Mechanical

hazards,

such

as

loose

or

missing

hardware

To

determine

whether

there

are

any

potentially

unsafe

conditions,

use

the

following

checklist

at

the

beginning

of

every

service

task.

Begin

the

checks

with

the

power

off,

and

the

power

cord

disconnected.

Checklist:

1.

Check

exterior

covers

for

damage

(loose,

broken,

or

sharp

edges).

2.

Power

off

the

computer.

Disconnect

the

power

cord.

3.

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

pin

and

the

frame

ground.

b.

The

power

cord

should

be

the

type

specified

in

the

parts

list.

c.

Insulation

must

not

be

frayed

or

worn.

4.

Check

for

cracked

or

bulging

batteries.

5.

Remove

the

cover.

6.

Check

for

any

obvious

non-ThinkPad

alterations.

Use

good

judgment

as

to

the

safety

of

any

non-ThinkPad

alterations.

7.

Check

inside

the

unit

for

any

obvious

unsafe

conditions,

such

as

metal

filings,

contamination,

water

or

other

liquids,

or

signs

of

fire

or

smoke

damage.

8.

Check

for

worn,

frayed,

or

pinched

cables.

Safety

information

Introduction

15

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