NEC POWERMATE ES 5200 - SERVICE, Руководство по обслуживанию

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1-16 System Overview
LS-120 Diskette Drive
Some models come with an Imation
®
LS-120 120-MB diskette drive. The
LS-120 drive is a very high-capacity, high-performance storage device that is
capable of using 120-MB diskettes. It is also backward compatible with 720-KB
and 1.44-MB diskettes.
Hard Drive
All systems ship with one internal 3 1/2-inch hard drive (1-inch high, thin-
height). The drive is installed in an internal drive bay in the system. Drives are
available in 4.3-GB, 8.4-GB, and 12.9-GB IDE Ultra DMA models.
The riser board has two IDE/PCI interface connectors (primary and secondary)
for connecting IDE storage devices. In systems with an IDE hard drive, a three-
connector hard drive IDE cable connects to the IDE hard drive and the primary
connector on the riser board. Each connector supports up to two IDE devices.
An optional second IDE hard drive can be added to the primary channel in
desktop and minitower models. If the second hard drive is installed, it connects
to the middle connector on the IDE cable.
Hard drive jumper setting guidelines are given in Section 2, “System
Configuration.” Connector locations for the IDE hard drive connectors on the
riser board are given in Section 5, “Riser Board.” Section 6, “Illustrated Parts
Breakdown” lists the NEC CSD parts for the hard drives. Hard drive
specifications are given in Section 10, “Specifications.”
Power Supply
The power supply is mounted inside the system unit. It supplies power to the
system board, riser board, option boards, diskette drive, hard drives, CD-ROM
drive, keyboard, mouse, and other internal options. A fan inside the power
supply provides system ventilation. The power supply provides 145 watts (small
desktop) or 200 watts (desktop and minitower) and is NLX-compatible.
The power supply is switch-selectable for 115 or 230 Vac at an operating
frequency of 50/60 Hz. It is designed to comply with existing emissions
standards and provides sufficient power for a fully loaded system configuration.
The power supply voltage selection switch is factory set to 115 Vac for systems
used in the United States; it is set to 230 Vac for systems used in Europe.
Power supply connector locations on the riser board are given in Section 5,
“Riser Board.” Power supply specifications are given in Section 10,
“Specifications.”