IBM ThinkPad i Series 1500 User Manual download pdf (Page 22)

– Working near power supplies

– Removing or installing main units

 Before you start to work on the machine, unplug the

power cord. If you cannot unplug it, ask the customer

to power-off the wall box that supplies power to the

machine and to lock the wall box in the off position.

 If you need to work on a machine that has exposed

electrical circuits, observe the following precautions:

– Ensure that another person, familiar with the

power-off controls, is near you.

Attention: Another person must be there to

switch off the power, if necessary.

– Use only one hand when working with

powered-on electrical equipment; keep the other

hand in your pocket or behind your back.

Attention: There must be a complete circuit to

cause electrical shock. By observing the above

rule, you may prevent a current from passing

through your body.

– When using testers, set the controls correctly

and use the approved probe leads and accesso-

ries for that tester.

– Stand on suitable rubber mats (obtained locally,

if necessary) to insulate you from grounds such

as metal floor strips and machine frames.

Observe the special safety precautions when you

work with very high voltages; these instructions are in

the safety sections of maintenance information. Use

extreme care when measuring high voltages. Regu-

larly inspect and maintain your electrical hand tools

for safe operational condition.

 Do not use worn or broken tools and testers.

 Never assume that power has been disconnected

from a circuit. First, check that it has been

powered-off.

 Always look carefully for possible hazards in your

work area. Examples of these hazards are moist

floors, nongrounded power extension cables, power

surges, and missing safety grounds.

 Do not touch live electrical circuits with the reflective

surface of a plastic dental mirror. The surface is

conductive; such touching can cause personal injury

and machine damage.

 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

ThinkPad i Series 1400/1500 13

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IBM ThinkPad i Series 1500 User Manual Page 22

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