![background image](http://html1.mh-extra.com/html/viewsonic/ve720m-1/ve720m-1_service-manual_1021046009.webp)
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 EN61000-4-4 ±2KV
TRANSIENT TEST WITH NO DAMAGE
Power Supply Line Surge Immunity
Shall be able to withstand ±2KV (L-L) and ±2.3KV (L-PE) 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 display.
Color = Black
European Type Power Cable
Schuko CEE7-7 type plug.
Length = 1.8m, Connects to display.
Color = Black
CCC Type Power Cable
Separate 3-prong type plug.
Length = 1.8m. Connects to display.
Color = Black
PSE Type Power Cable
Separate 2-prong NEMA 1-15P type plug. Length = 1.8m. Connects
to display.
Color = Black
Power Saving Operation (Method)
VESA DPMS Signaling
Power Consumption
ON Mode < 60
W (max) / 51
W
(typ)
ACTIVE OFF < 2W
Recovery Time
ON Mode = N/A, ACTIVE OFF < 5 sec
ELECTRICAL REQUIREMENT
Horizontal / Vertical Frequency
Horizontal Frequency
30 – 82 kHz
Vertical Refresh Rate
50 – 85* Hz.
Maximum Pixel Clock
135 MHz
(EDID data is 140MHz)
Sync Polarity
Independent of sync polarity.
Timing Table
Item
Timing
Analog
1
640 x 350 @ 70Hz, 31.5kHz
Yes
2
640 x 400 @ 60Hz, 31.5kHz
Yes
3
640 x 400 @ 70Hz, 31.5kHz
Yes
5
640 x 480 @ 60Hz, 31.5kHz
Yes
6
640 x 480 @ 67Hz, 35.0kHz
Yes
6
ViewSonic Corporation
Confidential - Do Not Copy
VE720m-1_VE720mb-1