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General Information
Ac Components/Power Cords
WARNING
IF IT IS NECESSARY TO REPLACE THE POWER CORD, THE RE-
PLACEMENT CORD MUST HAVE THE SAME POLARITY AS THE
ORIGINAL CORD. OTHERWISE, A SHOCK HAZARD MIGHT EXIST
WHICH COULD RESULT IN INJURY OR DEATH. ALSO, THE
EQUIPMENT COULD BE SEVERELY DAMAGED IF EVEN A RE-
LATIVELY MINOR INTERNAL FAILURE OCCURRED.
An attached power cord plugs into an ac outlet to provide primary power to the computer. Power
cord part numbers are listed in Chapter 5. Chapter 4 contains a power cord replacement proce-
dure.
The computer is wired for either 90-125V or 198-250V ac and can be converted from one to the
other in the field. Conversion requires changing the power switch assembly, power supply cable, ac
power cord, and label. Chapter 4 has procedures for changing these components.
Safety
WARNING
LETHAL VOLTAGES ARE PRESENT INSIDE THE COMPUTER.
OBSERVE ALL WARNINGS IN THIS MANUAL, AND OBSERVE
THE FOLLOWING SAFETY PROCEDURES AND GUIDELINES.
General Safety Procedure
• Do all possible operations with the computer power cord unplugged from the ac outlet.
• If installation, maintenance, or repair must be done with the computer energized, take the
following precautions:
a. Never work alone in high-voltage areas. In case of accidental shock, a life may depend
on rapid removal from the energized source and appropriate first-aid action.
b. Employees working in high-voltage areas should know where to obtain respiratory
resuscitation and/or cardiopulmonary resuscitation (CPR), in case a fellow worker needs
assistance.
c. In case of burns, treat only after the person is breathing and has a normal heartbeat.
• If primary wiring change is made, perform continuity test between power cord ground and
metal chassis. Record results on repair order.
These simple precautions can save a life.
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