NEC MultiSync 20WGX2 Series, Service Manual

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8.3 Leakage Current Test
A leakage current should be measured under the conditions specified below, in order to confirm that
the requirements of the judgment standard are met.
1) Measuring conditions
Measuring instrument : Leakage current meter (A 1500 resistor should be incorporated,
together with a bypass capacitor of 0.15 F.)
Testing point : Between the exposed metallic block (D-SUB connector) and Phases A and B of the
power source.
Condition of the set : A power cable should be connected. The see-saw switch on the set side
should be turned ON and OFF.
2) Judgment standard
The current conducted between each of the power supply ’ s contacts is less than 3.5mA at 255Vac
(60Hz) and 0.2mA at 100Vac(60Hz).
8.4 Ground Continuity
The resistance between the ground side of the power cord and the accessible metal parts located in
ground circuit shall not exceed 0.1 ohm at current load of 25mA.
8.5 CTI Value of PCB
CTI value of below PCB should be more than 600.
Inverter circuit.
Power supply circuit.
8.6 Others
VESA Display Data Channel Command Interface (DDC CI) Standard.
VESA Display Data Channel Command Interface
– Proposed Implementation Guide.
USB Version 2.0.
USB I/F Logo.
Microsoft WHQL, Microsoft Windows XP logo.
Microsoft Windows Color Quality Specification for Liquid Crystal Display OEM
’ s.
Ω
μ
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