Sun Microsystems 6.0005E+11 manual 11-2

11

Table 11-1 Safety Precautions (Continued)

Item	Problem	Precaution
AC power cord	Electric shock	Unplug the AC cord from the AC wall socket before working inside the
		system chassis.
Wrist strap or	ESD	Wear a conductive wrist strap or foot strap when handling printed circuit
Foot strap		boards.
ESD mat	ESD	An approved ESD mat provides protection from static damage when used
		with a wrist strap or foot strap. The mat also cushions and protects small
		parts that are attached to printed circuit boards.
Cover panels	System damage	Attach all cabinet cover panels after performing any service work on the
	and overheating	system.
Filler panels and	System damage	Install card cage filler panels in all unused card cage slots. Open slots
load boards	and overheating	severely reduce the cooling capability of the system.
		NOTE: You must use load boards instead of filler panels in the 16-slot
		Enterprise 6000 system card cage.
SBus slot covers	System damage	Install SBus slot covers in all unused system board SBus slots. Openings on
	and overheating	the backs of system boards reduce the cooling capability of the system.

11.2 Symbols

The following symbols mean:
	WARNING	Hazardous voltages are present. To
		reduce the risk of electrical shock and
		danger to personal health, follow the
		instructions.
!	WARNING	Risk of personal injury. To reduce the
		risk, follow the instructions.
	CAUTION	Risk of equipment damage. To reduce
!
		the risk, follow the instructions.
	SURFACE	CAUTION: Hot surfaces. Avoid
		contact. Surfaces are hot and may
		cause personal injury if touched.

11-2 Ultra Enterprise 6000/5000/4000 Systems Manual—November 1996