Mitsubishi Electric MDT421S: Safety Precautions, Maintenance & Recommended Use

English-4

•   The power cable connector is the primary means of 

detaching the system from the power supply. The monitor 

should be installed close to a power outlet, which is easily 

accessible.

•   Handle with care when transporting. Save packaging for 

transporting.

•   Please clean the holes of back cabinet to reject dirt and 

dust at least once a year because of set reliability.

•   If using the cooling fan continuously, it’s recommended to 

wipe holes a minimum of once a month.

•   When installing the remote control batteries;

-   Align the batteries according to the (+) and (-) 

indications inside the case.

-  Align the (-) indication of the battery 

fi

 rst inside the 

case.

CAUTION:

Immediately unplug your monitor from the wall outlet and re-

fer servicing to quali

fi

 ed service personnel under the following 

conditions:

•   When the power supply cord or plug is damaged.

•   If liquid has been spilled, or objects have fallen into the 

monitor.

•  If the monitor has been exposed to rain or water.

•  If the monitor has been dropped or the cabinet damaged.

•  If the monitor does not operate normally by following 

 operating 

instructions.

Recommended Use

CAUTION:

•   For optimum performance, allow 20 minutes for warm-up.

•   Rest your eyes periodically by focusing on an object at 

least 5 feet away. Blink often.

•   Position the monitor at a 90° angle to windows and other 

light sources to minimize glare and re

fl

 ections.

•  Clean the LCD monitor surface with a lint-free, non-

abrasive cloth. Avoid using any cleaning solution or glass 

cleaner!

•   Adjust the monitor’s brightness, contrast and sharpness 

controls to enhance readability.

•   Avoid displaying 

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 xed patterns on the monitor for long 

periods of time to avoid image persistence (after image 

effects).

•   Get regular eye checkups.

Ergonomics

To realize the maximum ergonomic bene

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 ts, we recommend 

the following:

•   Use the preset Size and Position controls with standard 

signals.

•   Use the preset Color Setting.

•   Use non-interlaced signals.

•   Do not use primary color blue on a dark background, as 

it is dif

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 cult to see and may produce eye fatigue due to 

insuf

fi

 cient contrast.

FOR OPTIMUM PERFORMANCE, PLEASE NOTE

THE FOLLOWING WHEN SETTING UP AND USING

THE LCD COLOR MONITOR:

•  

DO NOT REMOVE MONITOR BACK COVER. 

There are 

no user serviceable parts inside and opening or removing 

covers may expose you to dangerous shock hazards or 

other risks.

Refer all servicing to quali

fi

 ed service personnel.

•   Do not spill any liquids into the cabinet or use your 

monitor near water.

•   Do not insert objects of any kind into the cabinet slots, as 

they may touch dangerous voltage points, which can be 

harmful or fatal or may cause electric shock, 

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 re or 

 equipment 

failure.

•   Do not place any heavy objects on the power cord. 

Damage to the cord may cause shock or 

fi

 re.

•   Do not place this product on a sloping or unstable cart, 

stand or table, as the monitor may fall, causing serious 

damage to the monitor.

•   When operating the  LCD monitor with an AC 100-120V 

power supply in North America, use a power supply cord 

provided with this monitor.

•   When operating the LCD monitor with an AC 220-240V 

power supply in Europe, use a power supply cord 

provided with this monitor.

•   In UK, use a BS-approved power cord with molded plug 

having a black (10A) fuse installed for use with this 

 monitor.

If a power cord is not supplied with this monitor, please 

contact your supplier.

•   When operating the LCD monitor with a 220-240V AC 

power supply  in Australia, use the power cord provided 

with this monitor.  

If a power cord is not supplied with this monitor, please 

contact your supplier.

•   For all other cases, use a power cord that matches the 

AC voltage of the power outlet and has been approved by 

and complies with the safety standard of your particular 

country.

•   Do not place any objects onto the monitor and do not use 

the monitor outdoors.

•  The inside of the 

fl

 uorescent tube located within the LCD 

monitor contains mercury. Please follow the laws or rules 

of your municipality to dispose of the tube properly.

•   Do not bend power cord.

•   Do not use monitor in high temperature, humid, dusty, or 

oily areas.

•   If monitor or glass is broken, do not come in contact with 

the liquid crystal and handle with care.

•   If the LCD monitor is damaged and the liquid crystal leaks 

out, do not inhale or swallow it.

•   Allow adequate ventilation around the monitor, so that 

heat can properly dissipate. Do not block ventilated 

openings or place the monitor near a radiator or other 

heat sources.

Do not put anything on top of the monitor.

Safety Precautions, Maintenance & Recommended Use