5-2 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993
To protect both yourself and the equipment, observe the safety precautions listed in
TABLE 5-1.
5.2 Symbols
The following symbols mean:
Caution – This equipment contains lethal voltages. Accidental contact can result in
serious injury or death.
Caution – Physical danger due to a non-electrical hazard or danger of irreversible
damage to data or to the operating system.
TABLE 5-1 Safety Precautions
Item Problem Precaution
AC power cord Electric shock Unplug the AC cord from the AC wall socket before working on
the power supply.
Grounding Leave the AC power cord plugged into the AC wall outlet when
replacing drives, SIMMs, chips, or the system board. Leaving
the AC power cord plugged into the wall outlet provides a
grounding path for the wrist strap, which must be attached.
Wrist strap Electrostatic
Discharge (ESD)
Wear a wrist strap when handling printed circuit boards, drives,
or other components such as SIMMs.
ESD mat ESD An approved antistatic mat provides protection from static
damage when used with a wrist strap. The mat also cushions
and protects small parts that are attached to printed circuit
boards. Chapter 12 “Illustrated Parts Breakdown, lists the part
number of the mat.
Printed circuit
boards
ESD Handle a printed circuit board by the edges only. Store a board
in an antistatic bag.
Cover System damage and
overheating
Replace the cover after performing service on the system.
SBus slot filler
panels
System damage and
overheating
Install filler panels in all unused SBus slots. Openings on the
back of system board reduces the cooling capability of the
system.
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