Dell OptiPlex GXa, Руководство по обслуживанию

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System Overview 1-23
Hard-Disk Drive for the Low-Profile Computer
The hard-disk drive assembly (consisting of the hard-disk drive and the hard-
disk drive bracket) is located inside the chassis at the left front of the computer
and is attached to the bottom of the chassis. One EIDE or SCSI 1-inch-high
hard-disk drive can be mounted on the hard-disk drive bracket.
Hard-Disk Drive for the Midsize Computer
The hard-disk drive bracket is located next to the externally accessible drive
bays at the front of the computer. The hard-disk drive bracket can contain either
one or two 1-inch-high EIDE or SCSI hard-disk drives, or one 1-inch-high
EIDE or SCSI hard-disk drive and one 1.6-inch-high EIDE or SCSI hard-disk
drive.
Hard-Disk Drive for the Mini Tower Computer
The hard-disk drive bracket is located beneath the externally accessible drive
bays at the front of the computer. The hard-disk drive bracket can contain either
one or two 1-inch-high EIDE or SCSI hard-disk drives, or one 1-inch-high
EIDE or SCSI hard-disk drive and one 1.6-inch-high EIDE or SCSI hard-disk
drive.
Power-Supply Service Data
The low-profile computers have a 145-W system power supply, the midsize
computers have a 200-W system power supply, and the mini tower computers
have a 230-W power supply. All system power supplies can operate from an AC
power source of 115 VAC at 50 to 60 Hz or 230 VAC at 50 to 60 Hz.
NOTE: Computers with enhanced manageability support contain a different set
of power supplies with secondary windings that provide trickle (flea) power for
the Wakeup On LAN feature when computer power is turned off.
The system power supply provides the DC operating voltages and currents
listed in Table 1-4.
NOTE: The power supply produces DC voltages only under its loaded condi-
tion. Therefore, when you measure these voltages, the DC power connectors
must be connected to their corresponding power input connectors on the system
board or drives.
WARNING: The voltage select switch, located on the back of the power
supply assembly, must be set to the correct operating voltage (115 V or
230 V) before you plug the power cable into an AC outlet.