![background image](http://html1.mh-extra.com/html/viewsonic/vx2025wm-1/vx2025wm-1_service-manual_1021500026.webp)
ViewSonic Corporation
Confidential - Do Not Copy
VX2025wm-1
23
6.2 Audio Amplifier UTC TDA7496L (U9)
The TDA7496L is a stereo 2W+2W class AB power amplifier; Features of the TDA7496L include linear
volume control, Stand-by and mute functions.
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.
Rated Input Voltage
20Vdc
Input Voltage Range
18.5~21.5Vdc
Input Current
<2A
Off state Input Power
<0.1W
INPUT
On / off control Voltage
2~5.25 for on, 0~0.2 for off
Rated Output Strike-on Voltage
1500~2000Vrms
Rated Output Voltage
710Vrms at 6mA
Rated Output Frequency
40~50KHz
OUTPUT
Rated Output Current
6~7mA
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.
Rated Input Voltage
90~264Vac, 47~63Hz
Operation Input Voltage
100~240Vac, 50~60Hz
Input Current
<1.5A@90Vac
Inrush Current
<80A @ 230Vac(Cold start)
INPUT
Output Voltage Regulation
+/-5%
Output Ripple and Noise
300 mVp-p
Rated Output Current
<4.16A
OUTPUT
Turn-on Delay
<3 seconds
Summary of Contents for VX2025wm-1
Page 49: ...ViewSonic Corporation Confidential Do Not Copy VX2025wm 1 46 ...
Page 59: ...ViewSonic Corporation Confidential Do Not Copy VX2025wm 1 56 11 PCB Layout Diagrams 11 1 ...
Page 60: ...ViewSonic Corporation Confidential Do Not Copy VX2025wm 1 57 11 2 ...
Page 61: ...ViewSonic Corporation Confidential Do Not Copy VX2025wm 1 58 11 3 ...