Dell OptiPlex GX520 - Manual (Page 156)

<F2> or <Ctrl><Alt><Enter> starts embedded system setup (during system start-
up only)
<Ctrl><Alt><b> automatically starts the computer from the network
environment specified by the remote boot
environment (PXE) rather than from one of the
devices in the system setup Boot Sequence option
(during system start-up only)
<F12> or <Ctrl><Alt><F8> displays a boot device menu that allows the user to
enter a device for a single boot (during system start-
up only) as well as options to run hard-drive and
system diagnostics
Controls and Lights
Power control push button
Power light green light — Blinking green indicates a sleep mode;
solid green indicates a power-on state.
amber light — Blinking amber indicates a problem
with an installed device; solid amber indicates an
internal power problem (see "
Power Problems ").
Hard-drive access light green
Link light solid green light indicates network connection
Link integrity light (on integrated network adapter) green light for 10-Mb operation; orange light for 100-
Mb operation; yellow light for a 1000-Mb (1-Gb)
operation
Activity light (on integrated network adapter) yellow blinking light
Diagnostic lights four lights on the back panel (see " Diagnostic Lights ")
Standby power light AUX_PWR on the system board
Power
DC power supply:
Wattage 220 W
Heat dissipation 751 BTU/hr
NOTE: Heat dissipation is calculated based upon the
power supply wattage rating.
Voltage manual selection power supplies — 90 to 135 V at
50/60 Hz; 180 to 265 V at 50/60 Hz
Backup battery 3-V CR2032 lithium coin cell
Physical
Height 11.4 cm (4.5 inches)
Width 39.9 cm (15.7 inches)
Depth 35.3 cm (13.9 inches)
Weight 10.4 kg (23 lb)
Environmental
Temperature:
Operating 10° to 35°C (50° to 95°F)
Storage –40° to 65°C (–40° to 149°F)
Relative humidity 20% to 80% (noncondensing)
Maximum vibration:
Operating 0.25 G at 3 to 200 Hz at 0.5 octave/min
Storage 0.5 G at 3 to 200 Hz at 1 octave/min
Maximum shock:
Operating bottom half-sine pulse with a change in velocity of
50.8 cm/sec (20 inches/sec)
Storage 27-G faired square wave with a velocity change of
508 cm/sec (200 inches/sec)
Altitude:
Operating – 15.2 to 3048 m (–50 to 10,000 ft)
Storage – 15.2 to 10,668 m (–50 to 35,000 ft)