IBM S09N-8590-00 manual FRU Removals and Replacements, FRU Service Procedures

Page 29

FRU Removals and Replacements

This section contains information about removals and replacements.

ŸDo not damage any parts. Only certified and trained

personnel should service the computer.

Ÿ The

arrows

in

this section

show

the

direction of

move-

ment

to remove a FRU, or

to turn a screw to release

the

FRU.

The

arrows are

marked

in

numeric order,

in

square callouts, to show the correct sequence of removal.

ŸWhen other FRUs must be removed before the failing FRU is removed, they are listed at the top of the page.

Ÿ To

replace

a

FRU,

reverse the

removal procedure

and

follow

any

notes

that pertain

to replacement.

ŸWhen replacing a FRU, use the correct screw size, as shown in the procedures.

Safety

Notice

1:

 

 

 

 

 

 

 

 

 

Before the computer is powered on

after

FRU

replace-

ment,

make

sure all

screws,

springs,

or

other small parts,

are

in

place

and

are not left loose inside the computer.

Verify

this

by

shaking

the

computer

and listening for rat-

tling sounds. Metallic parts or metal flakes can cause an

electrical

short

circuit.

 

 

 

 

 

Safety

Notice

4:

 

 

 

 

 

 

 

 

 

The

battery

can

cause a fire, explosion, or severe burn. Do

not

recharge

it,

remove

its

polarized

connector,

disas-

semble

it,

heat

it

above 100°C (212

°F),

incinerate it, or

expose its cell contents to water. Dispose of the battery as required by local ordinances or regulations. Use only the battery in the appropriate parts listing. Use of an incorrect

battery can result in ignition

or

explosion

of

the

battery.

Safety Notice

8:

 

 

 

 

 

 

 

 

 

Before removing

any FRU, power-off

the

computer,

unplug

all

power

cords

from

electrical

outlets,

remove

the

battery

ASM,

and then disconnect any interconnecting

cables.

 

 

An

electrostatic

discharge (ESD)

strap (P/N

6405959)

must

be

used

to establish

personal

grounding.

 

 

 

 

 

FRU Service Procedures

Review the following procedures before replacing any FRU.

24 ThinkPad 240

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Contents ThinkPad Hardware Maintenance Manual December Page 1999 Contents 1135 Rear Bracket 1140 Read This First ThinkPad 240 Hardware Maintenance ManualWhat to Do First Use new nylon-coated screws when you replace FRUsPassword Computer Product OverviewDescription Fn Key CombinationsFn + Result Status IndicatorsAll Application Programs Support This Function Checkout GuideFan ASM Checkout Audio CheckoutMemory Checkout Keyboard and Auxiliary Input Device CheckoutModem Board Checkout Adapter TrackPoint Checkout Ports Checkout Power Management FeaturesHibernation Mode Hibernation Function Error Codes Symptom-to-FRU IndexRAM Sequence Error MessagesIndicator-Related Symptoms Keyboard-Related SymptomsSpeaker-Related Symptoms Power-Related SymptomsPC Card PCMCIA-Related Symptoms Intermittent Problems Peripheral-Device-Related SymptomUndetermined Problems Utility Running the DiagnosticsDiskette DataFRU Service Procedures FRU Removals and ReplacementsFRU Battery Disk 1020Keyboard Flat Head Kgf-cm Black Modem Card Dimm Card ASM UnitQuan Upper Cover ASM From Base cover ASM ThinkPad Speaker Select Button ASM LED Cable ASM and Cable ASM LED-RFan ASM Torque Make Sure You use Correct screw for replacement Modem Cable ASM Water Channel ASM System Board Remove the system board from the base cover ASM Rear Bracket Pcmcia Slots LCD Bezel ASM LCD Inverter ASM LCD Panel ASM LCD Type a and B 4Flat Head Kgf-cm Type a 1180 LCDType B 1185 LCDHinge ASM FRU Computer Parts ListingAC Adapter Others ThinkPad 240 Type Panel designations LCD Unit Parts Listing LCD Type aService Tools LCD Unit Parts Listing LCD Type BDescription Trademarks IBM
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