Symbols - Sun Microsystems SPARC classic Service Manual

To protect both yourself and the equipment, observe the safety precautions listed in
TABLE 5-1
TABLE 5-1
Item Problem
AC power cord Electric shock
Grounding
Wrist strap Electrostatic
Discharge (ESD)
ESD mat ESD
Printed circuit ESD
boards
Cover System damage and
overheating
SBus slot filler System damage and
panels overheating
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.
5-2 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993
.
Safety Precautions
Precaution
Unplug the AC cord from the AC wall socket before working on
the power supply.
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.
Wear a wrist strap when handling printed circuit boards, drives,
or other components such as SIMMs.
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.
Handle a printed circuit board by the edges only. Store a board
in an antistatic bag.
Replace the cover after performing service on the system.
Install filler panels in all unused SBus slots. Openings on the
back of system board reduces the cooling capability of the
system.