Service manual

ViewSonic Corporation Confidential - Do Not Copy VA2012w-2_VA2012wb-2
5
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
US Type Power Cable
Separate 3-prong NEMA 5-15P type plug. Length = 1.8m.
Connects to AC outlet. Color = Black
European Type Power Cable
Schuko CEE7-7. Length = 1.8m, Connects to AC outlet. Color =
Black
Power Saving Operation(Method) VESA DPMS Signaling
Power Consumption
ON Mode < 50 W (max) / 47 W (typ)
ACTIVE OFF < 2W
Recovery Time ON Mode = N/A, ACTIVE OFF < 3 sec
ELECTRICAL REQUIREMENT
Horizontal / Vertical Frequency
Horizontal Frequency Analog: 30 – 94 kHz
Vertical Refresh Rate 50 – 75 Hz.
Maximum Pixel Clock Analog: 205 Mhz
Sync Polarity Independent of sync polarity.
Timing Table
Item Timing Analog Digital
1 640 x 350 @ 70Hz, 31.5kHz Yes N/A
2 640 x 400 @ 70Hz, 31.5kHz Yes N/A
3 640 x 480 @ 60Hz, 31.5kHz Yes N/A
4 640 x 480 @ 67Hz, 35.0kHz Yes N/A
5 640 x 480 @ 72Hz, 37.9kHz Yes N/A
6 640 x 480 @ 75Hz, 37.5kHz Yes N/A
7 720 x 400 @ 70Hz, 31.5kHz Yes N/A
8 720 x 480i 59.94/60Hz @ 15.7 kHz Yes N/A
9 720 x 576p 50Hz @ 31.25kHz Yes N/A
10 720 x 576i 50Hz @ 15.62kHz Yes N/A
11 800 x 600 @ 56Hz, 35.1kHz Yes N/A