Question about ViewSonic VA520 15" Flat Panel LCD Monitor

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What voltage is the dc adapter?

Power adapter

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You will need at least a 4 amp rated regulated 12 Volt power supply.
These are commercialy available from most electronics parts suppliers.
They come on a circuit board. You can mount it in your own case and
use the original Viewsonic wire end. If you do a google search for 12
volt reglated power supplies you should find many of these.

However, with a second-hand Sprint AC adapter with 3A,
12v adapter, the screen blinks on and off
intermittently. Obviously there is some difference here between a class
2 adapter and a power supply box.

Posted on Oct 03, 2008

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My viewsonic va520 had the problem of going of after about 20min,then if unplug the power supply,plug back in,it would cut out every 5 min. I have an adapter which is not for the va520,It`s a liteon model pb-1240-01a-rohs,12volt at 2amp also tryed 12v at 5amp; by dynex model bt60p1205, and they both work it. found my problem to be a couple of capacitors on the main board.,(c1 and c9.,replaced those now all ok again. hope this helps someone.

Posted on Nov 04, 2009

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I need a power cord for va520

Posted on Sep 17, 2009

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The dc adapter should be rated 9.3 amps at 12 volts DC, remember that under usage in an AC system the amps are 17-21 amps and the voltage is 110-120

Posted on Oct 03, 2008

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Look carefully at the jack for the power input; the required voltage and cuirrent is normally shown either molded in the plastic or printed faintly near the jack.
If it isn't present, do a search for reviews; many of them will include the either the input specs of the monitor or the output specs of the provided adapter. 

Posted on Oct 03, 2008

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Benimur
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SOURCE: AC/DC Adapter

Hi, You would need an adapter that puts out 12 Volt DC, Output Current: 3.3 Amp and the Center Positive Power Tip (Output Power: 40W). The original ViewSonic adapter is M/N: UP06031120A Hope this be of some help/idea/ Post back how things turn up or should you need further information. Good luck and kind regards.

Posted on Sep 13, 2007

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Posted on Jan 02, 2017

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1 Answer

Where do I get a power lead for this tv


Many appliances use one of the 4 or 5 most popular cordsets. If you do not have the old cord - you'll have to look at the power connector to determine if it needs a 2 or 3 conductor cord for a line voltage (120V and up) cord and then sketch the opening.

If yours has a small jack - like the types that use an AC adapter to power it up - you'll need to know the voltage, AC or DC, amps or wattage and the connector configuration. This can be as easy as the inside and outside diameters of the plug that is needed - it is almost always expressed in millimeters like this: "5.5mm x 4.0mm", this info may not be readily available - you might need to shop or google:

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Power off ac adopter is ok


remove the rear cover then tried to make a voltage checking since as you said the power adapter is good so what you need is a voltage checking going inside. you need a digital tester then make a voltage checking at the lcd control board if the dc supply goes through or not present. you can check also a bulged capacitor or burnt parts at the lcd control board.

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I picked up this monitor at a yard sale it says dc input?? is this the power supply? how do i hook up a ac cord?


If it says DC input and there are no other socket which has three prongs(this is for the AC input), all you need is an adapter, which you will plug to a wall socket and the other end would be plugged to the flat panel, it works like a transformer, just like any power supply, like for laptops, just try to find the correct voltage, 12v,16v or whatever is needed by the panel. Often you can find the voltage require on the panel itself, reading as POWER INPUT, xx volts or Power requirement.
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1 Answer

Samsung LCD monitor DC voltage


The internal DC power supply consists of 2 REGULATED power supply circuits, one is 5VDC (about 1A) for logic circuits, another is 12~18vdc (about 3~4A) for the backlight circuits.
Here are the service manuals: http://elektrotanya.com/?q=showresult&megnev=SAMSUNG%20&megnev2=943&kategoria=&kat2=all

It may not be practical to build two external power supply, and you have to know the points where to tap into on the PCB.

Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed SAMSUNG monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

Jun 21, 2010 | Computers & Internet

1 Answer

Monitor wont come on.green lite on the switching adaptor is off.Is the adaptor bad or monitor bad? How do I get a new adaptor?Model # WDS048120


The lamp on the power supply adapter should be on the minute it is plugged onto the AC outlet without the DC plug connected to the monitor, if it is not on then the AC adapter is bad, you can check the DC voltage with a digital meter. Post back so we can guide you further.

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net

May 18, 2010 | X2Gen MG19MY 19" LCD Monitor

2 Answers

Power failure issues


The specs for this monitor is a 60 Watt, 12 Volt, 5 Amp power adapter. The voltage must be the same. You can always get an adapter with a higher Amperage rating, but never get one with less, as this can overheat the adapter and damage it. I was not able to locate specs on whether the voltage to the monitor is DC or AC... most are DC. If this is the case, the observe the polarity at the monitor. Power adapters have a positive and a negative... center and outer contact, Make sure that the power adapter matches that of the monitor, else it will not work.

Sep 26, 2009 | Balance CM2017 17" Monitor

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AC/DC Adapter


Hi, You would need an adapter that puts out 12 Volt DC, Output Current: 3.3 Amp and the Center Positive Power Tip (Output Power: 40W). The original ViewSonic adapter is M/N: UP06031120A Hope this be of some help/idea/ Post back how things turn up or should you need further information. Good luck and kind regards.

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Daewoo monitor


If you know a little bit about electronics, then you can find or buy a multimeter to check the output voltage of the AC/DC power adapter (if it uses one, sometimes the converter/adapter is inside the monitor). In order to get a voltage reading from center "hole" of the end of the power cord, use a paper clip (thicker paper clip if you have it). If the converter voltage is good, then this monitor might be a warranty return candidate. Hope it's only a power adapter problem (you can find a replacement on Ebay) ZT3000 "Beta tester of "0"s and "1's"

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