IBM 3270 Maintenance Manual page 5

Work Environment
IV
• Do not work alone under hazardous
conditions or near equipment that has
dangerous voltages. Always inform your
supervisor if the conditions or voltages are a
possible problem.
• Remove all power ac and dc when removing
or assembling major components, when
working in the immediate area of power
supplies, when performing mechanical
inspection of power supplies, and when
installing changes in machine circuitry. Pull
the power cable plug from the receptacle to
remove the power source.
• Always look for possible hazards in your
work environment. Examples of hazards are
moist floors, non-grounded extension cables,
power surges, and missing safety grounds.
• Do not perform any action that makes the
product unsafe or that causes hazards in the
work environment.
• Before you start the equipment, make sure
that other service personnel or employees are
not in a hazardous position.
• Do not wear loose clothing that can be
caught in the moving parts of a machine.
Make sure that the sleeves of your clothing
are fastened or are rolled above the elbow. If
your hair is long, or if you wear a neck scarf,
fasten it to make it safe.
• Insert your necktie into your clothing or
fasten it with a clip (preferably
non-conductive) at approximately 8
centimeters (3 inches) from its end.