Delta THINKPAD R40 Technical Information download pdf (Page 67)

Removing

and

replacing

a

FRU

This

section

presents

directions

and

drawings

for

use

in

removing

and

replacing

a

FRU.

Be

sure

to

observe

the

following

general

rules:

1.

Do

not

try

to

service

any

computer

unless

you

have

been

trained

and

certified.

An

untrained

person

runs

the

risk

of

damaging

parts.

2.

Before

replacing

any

FRU,

review

“FRU

replacement

notices”

on

page

60.

3.

Begin

by

removing

any

FRUs

that

have

to

be

removed

before

the

failing

FRU.

Any

such

FRUs

are

listed

at

the

top

of

the

page.

Remove

them

in

the

order

in

which

they

are

listed.

4.

Follow

the

correct

sequence

in

the

steps

for

removing

the

FRU,

as

indicated

in

the

drawings

by

the

numbers

in

square

callouts.

5.

When

turning

a

screw

to

replace

a

FRU,

turn

it

in

the

direction

indicated

by

the

arrow

in

the

drawing.

6.

When

removing

the

FRU,

move

it

in

the

direction

indicated

by

the

arrow

in

the

drawing.

7.

To

put

the

new

FRU

in

place,

reverse

the

removal

procedure

and

follow

any

notes

that

pertain

to

replacement.

For

information

about

connecting

and

arranging

internal

cables,

see

“Locations”

on

page

127.

8.

When

replacing

a

FRU,

use

the

correct

screw

as

shown

in

the

procedures.

DANGER

Before

removing

any

FRU,

power

off

the

computer,

unplug

all

power

cords

from

electrical

outlets,

remove

the

battery

pack,

and

then

disconnect

any

interconnecting

cables.

Attention:

Before

the

computer

is

powered

on

after

FRU

replacement,

make

sure

that

all

screws,

springs,

and

other

small

parts

are

in

place

and

are

not

loose

inside

the

computer.

Verify

this

by

shaking

the

computer

gently

and

listening

for

rattling

sounds.

Metallic

parts

or

metal

flakes

can

cause

electrical

short

circuits.

Attention:

The

system

board

is

sensitive

to,

and

can

be

damaged

by,

electrostatic

discharge.

Before

touching

it,

establish

personal

grounding

by

touching

a

ground

point

with

one

hand

or

by

using

an

electrostatic

discharge

(ESD)

strap

(P/N

6405959).

Removing

and

replacing

a

FRU

ThinkPad

R40

63

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