Leakage Current Test; Ground Continuity; Cti Value Of Pcb; Others - NEC MultiSync 20WGX2 Series Service Manual

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,
●
Testing point : Between the exposed metallic block (D-SUB connector) and Phases A and B of the
●
Condition of the set : A power cable should be connected. The see-saw switch on the set side
●
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.
together with a bypass capacitor of 0.15 F.)
power source.
should be turned ON and OFF.
Ω
μ
5-21