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4. Safety Test
• Destination: All over the world
• Applicable standards: UL/C-UL
• Unit class: Class I units (the units protected against electric shocks by protective
earthing, or those equipped with 3-core power cords)
• Ratings: AC100 - 240V 50/60Hz 0.6A/0.3A
4.1 Input Current Measurements
Under the measuring conditions specified below, an input current should be measured while the 50Hz input
voltage is maintained at 220V AC (+0 to -5V). The input currents measured should all confirm so they satisfy
the judgment standard.
(1) Measuring conditions
Condition of the set : ON mode
Measuring conditions: The inspection signal is set at “1024X768 (75Hz)” and “white” is displayed
throughout the screen. At that time, the brightness and contrast should be kept under the brightest
condition.
(2) Judgment standard
The input current should be kept below 0.35A +10%.
4.2 Power Source/Earth Connections
a. Checks on the power source/earth connections
The earth side of the cord or the earth wire of the inlet filter for the cord set should be visually checked to see
that it is connected to the chassis block of the unit as specified below.
1) The earth wire color should be spiral of green and yellow. Units applicable to UL or C-UL
2) The earth wire should be firmly connected to the chassis block by the use of a screw (See Note) of
3.5mm∅ in diameter.
Note: Spring washers or star washers should be used, without fail.
b. Earth resistance testing
This testing should be carried out prior to the dielectric strength test.
The earth resistance should be 0.1Ω or less when a current of 25A AC is carried between the earth side of
the cord (the plug block or the section closest to the plug where no plug is provided) and the metallic block
(the DVI connector) that is used as a safety earth for the unit.
Where the earth resistance exceeds 0.1Ω, the condition should be still acceptable if the earth resistance is
0.1Ω or less when the resistance of the power cord is excepted.
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