Service manual

VIDEO INTERFACE
Input Connector(refer the appendix A) Analog : D-sub 15 ,
Digital: DVI-D
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 2B
Video Signals
1. Video RGB (Analog): Separate
2. DVI (Digital)
Video Impedance 75 Ohms (Analog), 100 Ohms (Digital)
Maximum PC Video Signal 950 mV with no damage to monitor
Maximum Mac Video Signal 1250 mV with no damage to monitor
Sync Signals TTL
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, 1152x864, 1280X960,
1280x1024, 1400x1050
* The image vertical size might not be full screen.
But the image vertical position should be at the
center
Exclusions Not compatible with interlaced video
POWER SUPPLY
Internal Power Supply Part Number: DAC-12M033 AF(DELTA)
Input Voltage Range 90 TO 264 VAC
Input Frequency Range 47.5 TO 63 HERTZ
Short Circuit Protection Output can be shorted without damage
Over Current Protection N/A
Leakage Current 3.5mA (Max) at 254VAC / 60Hz
EFFICIENCY 80 % typical at 115VAC Full Load
Fuse Internal and not user replaceable
Power Dissipation 50 Watts (typ)
Max Input AC Current 1.0Arms @ 90VAC, 0.8 Arms @180VAC
INRUSH CURRENT (COLD START) 30 A @ 120VAC, 60 A(max) @220VAC
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
defined to be in compliance with ISO 7779 (DIN
EN27779:1991) Noise measurements of machines
acoustics. Power Switch noise shall not be
considered
Power Saving Operation(Method) VESA DPMS Signaling
Power Consumption
ON Mode < 40 W (max) / 30 W (typ)
ACTIVE OFF < 1W
Recovery Time ON MODE = N/A, ACTIVE OFF < 3 SEC
ViewSonic Corporation
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VG2021m-1 Confidential - Do Not Copy