Sun Microsystems SPARCstation 20, Service Manual

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Chapter 5 Safety and Tools Requirements 41
FIGURE 5-1
Symbols Used in This Manual
System Precautions
Observe all safety precautions and ensure compliance with skill level requirements,
certification, and all applicable local and national laws.
Procedures contained in this document must be performed by trained maintenance
providers. Only people who have been trained by the Sun Microsystems training
facilities (or by Sun Microsystems affiliates) and have been certified as required by
local and national laws are considered qualified.
Caution –
Before beginning a service task, carefully read each of the procedures in
this manual. If similar operations on comparable equipment have not been
performed, do not attempt to perform these procedures.
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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.
Caution – Hot surface. Avoid contact. Surfaces are hot an may cause
personal injury if touched.
AC – Terminal power outlet to which alternating current or voltage may
be applied.
ON – Applies DC power to the system.
STANDBY – Removes DC power from the system.