4. Names and Functions of Components
Express5800/R320c-E4, R320c-M4 User's Guide
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Chapter 1 General Description
4.2
Front View (With front bezel removed)
(1) CPU/IO module 0
A module to install CPU (processor), memory (DIMM), PCI card, cooling fan unit, and hard
disk drive.
(2) Hard disk drive bay
A bay to install hard disk drives. The last-digit number indicates a slot number.
(3) UID (Unit ID) switch
Used to turn ON/OFF the UID LED on the front of the device. When pressing the switch
once, UID LED lights and it goes off when pressing it again.
(4) Dump (NMI) switch
Memory dump is executed when pressing the button of primary CPU/IO module for 4 to 8
seconds.
(5) Disk access LED
This LED lights/blinks while accessing the installed hard disk drives.
(6) Optical disk drive
This device is used to read data from the disks such as DVDs and CD-ROMs.
(7) System POWER LED
This LED lights in green when one of the powers of the CPU/IO modules is ON. LED goes
off when both powers of CPU/IO module are OFF.
(8) System FAULT LED
When one of the CPU/IO modules fails, the LED goes on amber. Details can be confirmed
by checking (14) EXPRESSSCOPE. The LED goes on amber when the failed CPU/IO
module cannot be identified.
(9) System FT LED
This LED displays the device status.
The LED lights in green when operating under duplex condition.
The LED goes off if it is not in duplex condition.
The LED blinks in green while executing Active Upgrade.
(10) System ID LED
This LED is used to identify the device to be maintained.
This LED lights in blue when pressing UID switch is pressed (see the next page).
This LED blinks in blue when there are device identification requests remotely.
(11) USB connector
Used to connect with the device supporting USB interface.
(12) Power switch
Used to turn ON/OFF the power. When pressing it once, the power turns ON. When
pressing it again, the power turns OFF. Forced shutdown takes place when pressing it for 4
seconds or longer.
(13) CPU/IO module 1
A module to install CPU (processor), memory (DIMM), PCI card, cooling fan unit, and hard
disk drive. The names of each part are the same as CPU/IO module 0.
(14) EXPRESSSCOPE
This LED indicates the status of CPU/IO modules. It lights green or blinks green or amber.
(15) SLIDE-TAG
A Label where N-Code and Serial number are printed is pasted to this tag.
Module ID LED
