Lenovo B575 Hardware Maintenance Manual
4
• Always look carefully for possible ha zards 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 followi ng parts with the power on when they are removed
from their normal operating places in a machine:
– Power supply units
–Pumps
– Blowers and fans
– Motor generators
and similar units. (This practice ensures correct grounding of the units.)
• If an electrical ac cident occurs:
– Caution: do not become a victim yourself.
– Switch off the power.
– Send the victim to get medical aid.