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1 GENERAL
specification
Test Resolution & Frequency
1024 x 768 @ 60Hz
Test Image Size
Full Size
Contrast and Brightness Controls
Factory Default:
Contrast = 70%, Brightness = 100%
2 VIDEO
INTERFACE
Analog Input Connector
DB-15 (Analog), refer the appendix A
Default Input Connector
Defaults to the first detected input
Video Cable Strain Relief
Equal to twice the weight of the monitor for five
minutes
Video Cable Connector DB-15 Pin out
Compliant DDC 1/2B
Video Signals
1. Video RGB (Analog), Separate
Video Impedance
75 Ohms (Analog)
Maximum PC Video Signal
950 mV with no damage to monitor
Maximum Mac Video Signal
1250 mV with no damage to monitor
Sync Signals
LVDS
DDC 1/2B
Compliant with Revision 1.3
Sync Compatibility
Separate Sync
Video Compatibility
Shall be compatible with all PC type computers,
Macintosh computers, and after market video
cards
Resolution Compatibility
640 x 350, 640 x 480, 720 x 400 (640 x 400),
800 x 600, 832 x 624, 1024 x 768
Exclusions
Not compatible with interlaced video
3 POWER
SUPPLY
Internal Power Supply
Part Number: 715G1823-I
Input Voltage Range
100 TO 240 VAC
Input Frequency Range
50 TO 60 HERTZ
Short Circuit Protection
Output can be shorted without damage
Over Current Protection
(1)13V_4.5A@5V_1.5A
(2)5V_6A@13V_2A
Leakage Current
3.5 mA (Max) at 254VAC / 60Hz
Efficiency
80 % typical at 115VAC Full Load
Fuse
Internal and not user replaceable
Power Dissipation
4 Watts (typ)
Max Input AC Current
1 Arms @ 90VAC, 0.5 Arms @180VAC
Inrush Current (Cold Start)
60 A @ 240 VAC, 30 A(max) @ 110 VAC
Power Supply Cold Start
Shall start and function properly when under full load, with
all combinations of input voltage, input frequency, and
operating temperature
Power Supply Transient Immunity
Shall be able to withstand an ANSI/IEEE C62.41-1980
6000V 200 ampere ring wave transient test with no damage
Power Supply Line Surge Immunity
Shall be able to withstand 1.5 times nominal line voltage
for one cycle with no damage
Power Supply Missing Cycle Immunity
Shall be able to function properly, without reset or visible
screen artifacts, when ½ cycle of AC power is randomly
missing at nominal input
Power Supply Acoustics
The power supply shall not produce audible noise that
would be detectable by the user. Audible shall define to be
ViewSonic Corporation
VA503b-1_ VA503m-1
5
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...
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Page 78: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 75 11 PCB Layout Diagram...
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Page 81: ...ViewSonic Corporation Confidential Do Not Copy VA503b 1_ VA503m 1 78 POWER PCB VIEW...
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