Laser Safety Information; Liquid Crystal Display (Lcd) Notice; Using Headphones Or Earphones - Lenovo ThinkPad E550 User Manual

Laser safety information

CAUTION:
When laser products (such as CD-ROM drives, DVD drives, 3D cameras, fiber optic devices, or
transmitters) are installed, note the following:
• Do not remove the covers. Removing the covers of the laser product could result in exposure to
hazardous laser radiation. There are no serviceable parts inside the device.
• Use of controls or adjustments or performance of procedures other than those specified herein
might result in hazardous radiation exposure.
DANGER
Some laser products contain an embedded Class 3B laser diode. Note the following:
Laser radiation when open. Do not stare into the beam, do not view directly with optical
instruments, and avoid direct exposure to the beam.
DANGER
Notices for 3D camera:
• Do not attempt to open any portion of 3D camera.
• There are no user serviceable parts with the 3D camera.
• Modification or service of the 3D camera, specifically the IR laser projector might cause the
emissions to exceed Class 1.

Liquid crystal display (LCD) notice

CAUTION:
The LCD is made of glass, and rough handling or dropping the computer can cause the LCD to break.
If the LCD breaks and the internal fluid gets into your eyes or on your hands, immediately wash
the affected areas with water for at least 15 minutes; if any symptoms are present after washing,
get medical care.
Note: For products with mercury-containing fluorescent lamps (for example, non-LED), the fluorescent lamp
in the liquid crystal display (LCD) contains mercury; dispose of according to local, state, or federal laws.

Using headphones or earphones

CAUTION:
Excessive sound pressure from earphones and headphones can cause hearing loss. Adjustment of
the equalizer to maximum increases the earphone and headphone output voltage and the sound
pressure level. Therefore, to protect your hearing, adjust the equalizer to an appropriate level.
Excessive use of headphones or earphones for a long period of time at high volume can be dangerous if the
output of the headphone or earphone connectors do not comply with specifications of EN 50332-2. The
headphone output connector of your computer complies with EN 50332-2 Sub clause 7. This specification
limits the computer's maximum wide band true RMS output voltage to 150 mV. To help protect against
hearing loss, ensure that the headphones or earphones you use also comply with EN 50332-2 (Clause 7
limits) for a wide band characteristic voltage of 75 mV. Using headphones that do not comply with EN
50332-2 can be dangerous due to excessive sound pressure levels.
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