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6-2 Ultra Enterprise 6000/5000/4000 Systems Manual—November 1996
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.
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 6-1 Power 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)
Table 6-2 Safety Precautions
Item Problem Precaution
Wrist or
foot strap
ESD Wear a conductive wrist strap or foot strap when handling power supplies.
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
and overheating
Re-install all cabinet cover panels after performing any service work on the
system.
SBus slot covers System damage
and overheating
Install SBus slot covers in all unused SBus slots.