Hitachi GS4000 Series Quick Start Manual page 17

GS4000 Quick Start Guide, Revision 3
Be careful with optical network interfaces. The board
with the label (shown at the right) shows that a laser is
used. Never directly look into the optical ports.
The GR4000 or GS4000 contains a lithium battery for
the real-time clock. Mishandling this battery may cause
overheating, damage, or in an extreme case, explosion
or fire. Do not remove the battery, attempt to
disassemble it, or expose it to temperatures of over
100°C (212°F). Also, do not incinerate or dispose of this
battery in water.
Remove dust on or around the device regularly.
Accumulated dust can choke off ventilation to components, causes fans to fail, and could
cause a fire or an electric shock.
Once the device is powered up, an inrush of electrical current occurs. Do not operate this
device during a reduced voltage condition (brownout). Similarly, do not allow the voltage of a
power facility under your control to decrease. A brownout condition also affects the other
equipment besides the GR4000 or GS4000 if connected to the same power facility.
Before attaching or detaching a power cable, make sure that the switch of the targeted power
supply is turned OFF.
When replacing a fan while powered on, it must be done within one minute after being
detached. If replacement takes more than one minute, the temperature inside the device will
start to rise and could affect other components.
When carrying or packing the device and its optional modules, wear a wrist strap to prevent
static electricity. Without a wrist strap, the device might be damaged by static electricity.
When installing a Packet Routing Unit (PRU for the GR4000) or Packet Switching Unit (PSU for
the GS4000) into the chassis, open its levers as shown in the figure at the right. If you try to
install it with its levers closed or open too wide, the levers could be
damaged when being inserted into the slot.
Whenever you use the GR4000 or GS4000 without one or more of
its option modules attach blank panels in place of the option
modules. Otherwise, air will not flow properly through the device,
which could cause the temperature inside to rise beyond what its
safe operating limit.
When carrying or packing optional modules, such as NIFs, BCUs,
PRUs, PSUs, memory modules (DIMM), memory cards, and power
supplies, do not touch the electronic components or circuitry on
the solder side. To avoid damage, always store these boards and components in approved anti-
static bags.
The option modules for the GR4000 or GS4000 should be mounted only into those devices.
Option modules marked with "UL Listed Accessory" indicate that they have won Underwriters
Laboratories approval on the condition that they are mounted into the UL-approved devices.
Do not put objects on a Packet Routing (Switching) Unit. Doing this might
damage the outer frame of the module. Comply with the instructions
written on the label attached to the module (see right).
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QSGGS4KX10-00 5794092-2X