ViewSonic VA2012w-2 Service Manual page 27

6.3 Inverter Board
This is a specific inverter for VA2012 monitor 40W backlight which converters 20Vdc to drive 6 tubes cold cathode
fluorescent tubes. Electrical specification described as below.
6.3.1 Inverter Electrical specification described as below.
INPUT Rated Input Voltage
Input Voltage Range
Input Current
Off state Input Power
On / off control Voltage
OUTPUT Rated Output Strike-on Voltage
Rated Output Voltage
Rated Output Frequency
Rated Output Current
6.4 This is a general purpose AC / DC adapter which converter 90~240 Vac to a stabilized DC voltage 20V for inverter and
12V for system board with rated output current of 4.16A
6.4.1 Power Electrical specification described as below.
INPUT
OUTPUT
ViewSonic Corporation
Rated Input Voltage
Operation Input Voltage
Input Current
Inrush Current
Output Voltage Regulation
Output Ripple and Noise
Rated Output Current
Turn-on Delay
20Vdc
18.5~21.5Vdc
<2A
<0.1W
2~5.25 for on, 0~0.2 for off
1500~2000Vrms
710Vrms at 6mA
40~50KHz
6~7mA
90~264Vac, 47~63Hz
100~240Vac, 50~60Hz
<1.5A@90Vac
<80A @ 230Vac(Cold start)
+/-5%
300 mVp-p
<4.16A
<3 seconds
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