Iiyama Vision Master Pro 451, Руководство по обслуживанию

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GOOD EARTH GROUND
PLACE THIS PROBE ON
EACH EXPOSED METAL
PART
AC VOLTMETER
(HAVING 1,000
Ω
/V OR MORE SENSITIVITY)
Alternate Check Method
Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Use an
AC voltmeter having 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500
Ω
10W resistor
paralleled by a 0.15uF AC-type capacitor between an exposed metal part and a known good earth ground (water
pipe etc.).
Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed
metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage
across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured
must not exceed 2.45V AC(r.m.s.). This corresponds to 3.5mA AC(r.m.s.).
0.15uF AC-TYPE
1,500
Ω
10W
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