NEC PX-50XM4, Service Manual

Page: 17 / 535

Precautions
Please read this manual carefully before using your plasma
monitor and keep the manual handy for future reference.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE COVER. NO
USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
This symbol warns the user that uninsulated
voltage within the unit may have sufficient
magnitude to cause electric shock.
Therefore, it is dangerous to make any kind
of contact with any part inside of this unit.
This symbol alerts the user that important
literature concerning the operation and
maintenance of this unit has been included.
Therefore, it should be read carefully in
order to avoid any problems.
WARNING
TO PREVENT FIRE OR SHOCK HAZARDS, DO NOT EXPOSE
THIS UNIT TO RAIN OR MOISTURE. ALSO DO NOT USE
THIS UNIT’S POLARIZED PLUG WITH AN EXTENSION CORD
RECEPTACLE OR OTHER OUTLETS, UNLESS THE
PRONGS CAN BE FULLY INSERTED. REFRAIN FROM
OPENING THE CABINET AS THERE ARE HIGH-VOLTAGE
COMPONENTS INSIDE. REFER SERVICING TO QUALIFIED
SERVICE PERSONNEL.
Warnings and Safety Precaution
This plasma monitor is designed and
manufactured to provide long, trouble-free service.
No maintenance other than cleaning is required.
Please see the section “Plasma monitor cleaning
procedure” on the next page.
The plasma display panel consists of fine picture
elements (cells) with more than 99.99 percent active
cells. There may be some cells that do not produce
light or remain lit.
For operating safety and to avoid damage to the unit,
read carefully and observe the following instructions.
To avoid shock and fire hazards:
1. Provide adequate space for ventilation to avoid internal
heat build-up. Do not cover rear vents or install the unit
in a closed cabinet or shelves.
If you install the unit in an enclosure, make sure there
is adequate space at the top of the unit to allow hot air
to rise and escape. If the monitor becomes too hot, the
overheat protector will be activated and the monitor will
be turned off. If this happens, turn off the power to the
monitor and unplug the power cord. If the room where
the monitor is installed is particularly hot, move the
monitor to a cooler location, and wait for 60 minutes to
cool the monitor. If the problem persists, contact your
dealer for service.
2. Do not use this unit’s polarized plug with extension cords
or outlets unless the prongs can be completely inserted.
3. Do not expose the unit to water or moisture.
4. Avoid damage to the power cord, and do not attempt to
modify the power cord.
5. Unplug the power cord during electrical storms or if
the unit will not be used over a long period.
6. Do not open the cabinet which has potentially dangerous
high voltage components inside. If the unit is damaged in
this way the warranty will be void. Moreover, there is a
serious risk of electric shock.
7. Do not attempt to service or repair the unit. The
manufacturer is not liable for any bodily harm or damage
caused if unqualified persons attempt service or open
the back cover. Refer all service to authorized Service
Centers.
To avoid damage and prolong operating life:
1. Use only with 100-240V 50/60Hz AC power supply.
Continued operation at line voltages greater than 100-
240 Volts AC will shorten the life of the unit, and might
even cause a fire hazard.
2. Handle the unit carefully when installing it and do not
drop.
3. Set the unit away from heat, excessive dust, and direct
sunlight.
4. Protect the inside of the unit from liquids and small
metal objects. In case of accident, unplug the power
cord and have it serviced by an authorized Service
Center.
5. Do not hit or scratch the panel surface as this causes
flaws on the surface of the screen.
6. For correct installation and mounting it is strongly
recommended to use a trained, authorized dealer.
7. As is the case with any phosphor-based display (like a
CRT monitor, for example) light output will gradually
decrease over the life of a Plasma Display Panel.
8. To avoid sulfurization it is strongly recommended not to
place the unit in a dressing room in a public bath or hot
spring bath.
9. Do not use in a moving vehicle, as the unit could drop or
topple over and cause injuries.
10. Do not place the unit on its side, upside-down or with the
screen facing up or down, to avoid combustion or electric
shock.
Plasma monitor cleaning procedure:
1. Use a soft dry cloth to clean the front panel and bezel
area. Never use solvents such as alcohol or thinner to
clean these surfaces.
2. Clean plasma ventilation areas with a vacuum cleaner
with a soft brush nozzle attachment.
3. To ensure proper ventilation, cleaning of the ventilation
areas must be carried out monthly. More frequent cleaning
may be necessary depending on the environment in which
the plasma monitor is installed.
Recommendations to avoid or minimize phosphor burn-in:
Like all phosphor-based display devices and all other gas
plasma displays, plasma monitors can be susceptible to
phosphor burn under certain circumstances. Certain
operating conditions, such as the continuous display of a
static image over a prolonged period of time, can result in
phosphor burn if proper precautions are not taken. To protect
your investment in this plasma monitor, please adhere to the
following guidelines and recommendations for minimizing
the occurrence of image burn:
Important Information
CONFIDENTIAL
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