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TC9830SM Rev. B 7/98 Confidential vii
Safety Summary
Warning and caution messages appear throughout this manual. They alert you to potentially safety hazards or
potential damage to equipment. The messages and there meaning are shown below.
WARNING
Calls attention to improper practices that could
result in a potentially serious, even lethal injury.
CAUTION
Calls attention to practices that could cause
minor injury or that could cause damage to
equipment.
Familiarize yourself with proper procedures before operating or repairing the equipment. Follow these precautions
for your own safety.
Personal Safety
• Treat every circuit as if it is “Live”. If in doubt,
check with a neon tester or voltmeter.
• Know how to turn off power in the work area
and how to obtain help in an emergency.
• Don’t work on equipment under power unless
it’s absolutely necessary. If you must, use
extreme caution.
• Shock. Don’t under estimate the danger of
shock. 12 mA causes hand muscles to
contract, so you cannot free yourself; 24 mA
has proven fatal.
• Tools. Use the right tools for the job. A tool
which slips can cause a short -- or a shock.
When working on live circuits, use tools with
insulated handles.
• Safety Devices. Don’t bypass safety devices,
particularly fuses. If a hot wire shorts to an
ungrounded frame, the frame itself becomes
hot and potentially dangerous.
• Electrical Fires Use Type C, BC, or ABC
extinguishers only.
Equipment Safety
Your body is a giant capacitor. It can store several
thousand volts of electricity. Digital equipment is
easily damaged or destroyed by this static
electricity. You don’t have to see a spark to ruin an
IC -- 50 volts is enough. To protect the equipment
from static damage, follow these guidelines:
• Ground yourself before reaching into the
equipment or touching any circuit board or
other electrical component. The Monarch Static
Ground Kit contains everything you need.
• Re-ground whenever you have walked away
and returned to the equipment. Be especially
careful around carpet. Carpet is a major
source of static buildup in the body. Even a
few steps can recharge you.
• The smaller the object, the greater the
precautions must be. A board in the machine
is better protected than one which is not
plugged in; a chip on a board is better
protected than one in your hand.
• Avoid touchings pins coming out of a chip or
the connector edge of circuit boards. These
metal parts have signal and data lines which
are connected directly to fragile circuits.