Important Safety Warnings - HP xw4300 Service And Technical Reference Manual

P.1

Important Safety Warnings

WARNING! Avoiding Electrical Shocks. To avoid electrical shock, do not open the power supply. There are no user-
serviceable parts inside.
To avoid electrical shock and harm to your eyes by laser light, do not open the DVD laser module. The laser module
should be serviced by service personnel only. Do not attempt to make any adjustment to the laser unit. Refer to the
label on the DVD for power requirements and wavelength. This product is a class I laser product.
WARNING! Grounding your Equipment. For your safety, always connect the equipment to a grounded wall outlet.
Always use a power cord with a properly grounded plug, such as the one provided with the equipment, or one in
compliance with your national safety standards. This equipment can be disconnected from the power by removing the
power cord from the power outlet. This means the equipment must be located close to an easily accessible power
outlet.
WARNING! Protecting your Ears. If your system is a multimedia model, or if you have installed a sound card in your
system, always turn the volume down before connecting the headphones or speakers. This prevents discomfort from
unexpected noise or static. Listening to loud sounds for prolonged periods of time may permanently damage your
hearing. Before putting on headphones, place them around your neck and turn the volume down. When you put on
the headphones, slowly increase the volume until you find a comfortable listening level. When you can hear
comfortably and clearly, without distortion, leave the volume in that position.
WARNING! Removing and Replacing the Cover. For your safety, never remove the system side cover without first
disconnecting the power cord from the power outlet and removing any connection to a telecommunications network. If
a Power Protection Device is fitted to your system, you must shut down your computer using its on/off switch, then
remove the power cord before removing the system's side cover. Remove the Power Protection Device cables before any
servicing operation. Always replace the side cover before switching the system on again.
WARNING! Getting Battery Safety Information. There is a danger of explosion if the battery is incorrectly installed. For
your safety, never attempt to recharge, disassemble, or burn an old battery. Replace the battery with the same or
equivalent type, as recommended by the manufacturer.
The battery in this system is a lithium battery that does not contain any heavy metals. However, to protect the
environment, do not dispose of batteries in household waste. Return used batteries either to the shop from which you
bought them, to the dealer from whom you purchased your system, or to HP so that they can either be recycled or
disposed of in the correct way. Returned batteries will be accepted free of charge.
WARNING! Avoiding Metallic Particulates. They can be especially harmful around electronic equipment. This type of
contamination may enter the data center environment from a variety of sources, including, but not limited to, raised
floor tiles, worn air conditioning parts, heating ducts, rotor brushes in vacuum cleaners, or printer component wear.
Because metallic particulates conduct electricity, they have an increased potential for creating short circuits in
electronic equipment. This problem is exaggerated by the increasingly dense circuitry of any electronic equipment.
Over time, very fine whiskers of pure metal can form on electroplated zinc, cadmium, or tin surfaces. If these whiskers
are disturbed, they might break off and become airborne, possibly causing failures or operational interruptions. For
over 50 years, the electronics industry has been aware of the relatively rare, but possible, threat posed by metallic
particulate contamination. During recent years, a growing concern has developed in computer rooms where these
conductive contaminants are formed on the bottom of some raised floor tiles.
Although this problem is relatively rare, it might be an issue within your computer room. Since metallic contamination
can cause permanent or intermittent failures on your electronic equipment, Hewlett-Packard strongly recommends that
your site be evaluated for metallic particulate contamination before installation of electronic equipment.
WARNING! Avoiding Burn Injuries. Some parts inside the computer will be hot. Turn off and unplug the system, then
wait approximately three to five minutes for it to cool down before opening the system access panels or touching
internal components.
8