Sun Microsystems 6.0005E+11 manual Voltage Supply Use

6

Note – A functioning peripheral power supply provides electrical precharge that is required for the hot-plug feature. Use the prtdiag (1M) command to determine if electrical precharge is available.

Table 6-1 lists the power supply voltages, their uses, and the power supplies that generate them.

Table 6-1Power Supply Summary

Voltage	Supply	Use
2.0V	PCM	GTL centerplane termination
3.3V	PCM	CPU/Memory Board (AC, DCs, FHC, SIMMs)
		UltraSPARC Module (SRAMs, SDBs, CPU I/O)
5V	PCM, PPS	SBus, Clock Board
		UltraSPARC Module power (via DC/DC converter)
12V	PPS	Peripherals (CD drive, tape drive)

6.1 Safety Precautions

	To protect both yourself and the equipment, any servicing of equipment
	should be performed by qualified personnel. Observe the precautions in
	Table 6-2.
	Table 6-2Safety Precautions
Item	Problem	Precaution
Wrist or	ESD	Wear a conductive wrist strap or foot strap when handling power supplies.
foot strap
ESD mat	ESD	An approved ESD mat provides protection from static damage when used
		with a wrist strap or foot strap.
Cover panels	System damage	Re-install all cabinet cover panels after performing any service work on the
	and overheating	system.
SBus slot covers	System damage	Install SBus slot covers in all unused SBus slots.
	and overheating

6-2 Ultra Enterprise 6000/5000/4000 Systems Manual—November 1996