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in compliance with ISO 7779 (DIN EN27779:1991) Noise
measurements of machines acoustics. Power Switch noise
shall not be considered
US Type Power Cable
Length = 1.8m. Connects to AC/DC Power Color = Black
Power Saving Operation(Method)
VESA DPMS Signaling
Power Consumption
ON Mode < 23 W (max)
POWER SAVING < 2W ,OFF < 1W
Recovery Time
On Mode = N/A, Active Off < 3 sec
4 ELECTRICAL
REQUIREMENT
Horizontal / Vertical Frequency
Horizontal Frequency
30 – 62 KHZ
Vertical Refresh Rate
50 – 85 HZ.
Maximum Pixel Clock
80 MHz
Sync Polarity
Independent of sync polarity.
Timing Table
Item Timing
Analog
1
640 x 350 @ 70Hz, 31.5kHz
Yes
2
640 x 400 @ 70Hz
Yes
3
640 x 480 @ 50Hz
Yes
4
640 x 480 @ 60Hz, 31.5kHz
Yes
5
640 x 480 @ 67Hz, 35.0kHz
Yes
6
640 x 480 @ 72Hz, 37.9kHz
Yes
7
640 x 480 @ 75Hz, 37.5kHz
Yes
8
640 x 480 @ 85Hz, 43.27kHz
Yes
9
720 x 400 @ 70Hz, 31.5kHz
Yes
10 800 x 600 @ 56Hz, 35.1kHz
Yes
11 800 x 600 @ 60Hz, 37.9kHz
Yes
12 800 x 600 @ 72Hz, 48.1kHz
Yes
13 800 x 600 @ 75Hz, 46.9kHz
Yes
14 800 x 600 @ 85Hz, 53.7kHz
Yes
15 832 x 624 @ 75Hz, 49.7kHz
Yes
16 1024 x 768 @ 60Hz, 48.4kHz
Yes
17 1024 x 768 @ 70Hz, 56.5kHz
Yes
18 1024 x 768 @ 72Hz, 58.1kHz
Yes
19 1024 x 768 @ 75Hz, 60.0kHz
Yes
*1. Tolerance
≧
± 2kHz.
*2. Any timing not in the list, it should display as normal or show on “OUT OF RANGE” OSD message
without blanking.
*3. The image quality of 85Hz mode might be worse than 75Hz.
AUDIO INTERFACE (SPEAKER SPECIFICATION) (For VA503m only)
Line input connection
3.5 mm stereo jack
Line input signal
1.0Vrms
Line input impedance
>10 kOhm
Maximum power output (Electric)
1 W @ < 8% distortion
Signal to Noise Ratio
50 dB
Frequency response
500 Hz – 20 Khz
Distortion
< 8 % THD (@1kHz)
ViewSonic Corporation
VA503b-1_ VA503m-1
6
Confidential - Do Not Copy
Summary of Contents for VA503b-1
Page 25: ...Circuit Diagram ViewSonic Corporation VA503b 1_ VA503m 1 22 Confidential Do Not Copy...
Page 44: ...ViewSonic Corporation VA503b 1_ VA503m 1 41 Confidential Do Not Copy...
Page 51: ...Picture 17 ViewSonic Corporation VA503b 1_ VA503m 1 48 Confidential Do Not Copy...
Page 63: ...ViewSonic Corporation VA503b 1_ VA503m 1 60 VA503m Confidential Do Not Copy...
Page 78: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 75 11 PCB Layout Diagram...
Page 79: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 76...
Page 81: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 78 POWER PCB VIEW...
Page 82: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 79...