Lenovo a57 9702 Zusätzliches Handbuch

Lenovo

Replacing

the

power

supply

Attention

Never

remove

the

cover

on

a

power

supply

or

any

part

that

has

the

following

label

attached.

Hazardous

voltage,

current,

and

energy

levels

are

present

inside

any

component

that

has

this

label

attached.

There

are

no

serviceable

parts

inside

these

components.

This

procedure

describes

how

to

remove

and

replace

the

power

supply.

1.

Remove

the

cover.

See

2.

Remove

the

drive

bay

assembly.

See

3.

Disconnect

all

power

supply

cables

from

the

system

board.

See

the

system

board

diagram

for

your

machine

type

at

4.

Remove

the

hard

disk

drive.

See

Note:

Observe

the

power

supply

cable

routing

underneath

the

hard

disk

drive.

5.

The

system

board

must

be

moved

out

of

the

way

to

remove

the

power

supply.

Remove

the

screws

that

secure

the

system

board

to

the

chassis

and

slide

the

system

board

away

from

the

power

supply.

Note:

You

do

not

have

to

remove

the

system

board

from

the

chassis

to

remove

the

power

supply.

6.

At

the

rear

of

the

chassis,

remove

the

three

screws

that

secure

the

power

supply.

Also

remove

the

screw

that

secures

the

power

supply

at

the

front.

94

Hardware

Maintenance

Manual