Power system checkout, Checking the ac adapter, Checking operational charging – Lenovo IdeaPad S9e -FR User Manual

Page 37: Power, System, Checkout, Checking, Adapter, Operational, Charging

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Power

system

checkout

To

verify

a

symptom,

do

the

following:

1.

Turn

off

the

computer.

2.

Remove

the

battery

pack.

3.

Connect

the

ac

adapter.

4.

Check

that

power

is

supplied

when

you

turn

on

the

computer.

5.

Turn

off

the

computer.

6.

Disconnect

the

ac

adapter

and

install

the

charged

battery

pack.

7.

Check

that

the

battery

pack

supplies

power

when

you

turn

on

the

computer.

If

you

suspect

a

power

problem,

see

the

appropriate

one

of

the

following

power

supply

checkouts:

v

“Checking

the

ac

adapter”

v

“Checking

operational

charging”

v

“Checking

the

battery

pack”

on

page

30

v

“Checking

the

backup

battery”

on

page

30

Checking

the

ac

adapter

You

are

here

because

the

computer

fails

only

when

the

ac

adapter

is

used.

v

If

the

power-on

indicator

does

not

turn

on,

check

the

power

cord

of

the

ac

adapter

for

correct

continuity

and

installation.

v

If

the

computer

does

not

charge

during

operation,

go

to

“Checking

operational

charging”

To

check

the

ac

adapter,

do

the

following:

1.

Unplug

the

ac

adapter

cable

from

the

computer.

2.

Measure

the

output

voltage

at

the

plug

of

the

ac

adapter

cable.

See

the

following

figure:

1

(20V)

2

Pin

Voltage

(V

dc)

1

+20

2

Ground

3.

If

the

voltage

is

not

correct,

replace

the

ac

adapter.

4.

If

the

voltage

is

acceptable,

do

the

following:

v

Replace

the

system

board.

v

If

the

problem

persists,

go

to

“IdeaPad

S9e,

S10e,

and

S10”

on

page

45.

Note:

Noise

from

the

ac

adapter

does

not

always

indicate

a

defect.

Checking

operational

charging

To

check

whether

the

battery

charges

properly

during

operation,

use

a

discharged

battery

pack

or

a

battery

pack

that

has

less

than

50%

of

the

total

power

remaining

when

installed

in

the

computer.

General

checkout

29

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