The socket on the back of the monitor is labled DC IN.
*What I would like to know is: what type of power cable/transformer do I need and more specifically, what voltage should it be (this is the piece of information that for some reason is missing. I have taken it to a shop and was told that without this information there was a chance that the monitor would be wrecked by gambling on the voltage and trying an incorrect cable).Most monitors seem to be in the range of 9 to 15V but as I am somewhat inept with electrical devices I do not wish to assume a general truth, nor do I know whether I have to find an adaptor that is exactly right or simply works within this or a paricular range.
It may be that I am just being a bit slow but if you could think of anything that would be of help I might stand some chance of getting this thing going. As you may have guessed, I am not what you would call an expert so please be patient with any explaining.
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Re: what voltage power cable/transformer do i need for an...
I don't know why it specifically say 100 - 240 VAC (That's AC Input), then label the jack as DC IN. So I'd guess it will run on either. Is there a jack or connector for the AC in as well? Most DC inputs are indeed around 12 Volts, this is so they can be operated on vehicle voltage.
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the "flyback" is the VERY high voltage transformer that powers the CRT through a cable that plugs into the CRT inside the monitor case. Don't try unplugging, even with power off, as it has to be discharged to ground to remove risidual voltage, like a capasitor. This voltage is about 35,000 vdc.
The 68UF 450 is for the primay smps driving side, are you getting about 160vdc on that cap?
The PWM IC get the kick start DC voltage from the main bridge rectifier thorough a bunch of high resistance resistor to drop the 160vdc down to aboit 15vdc, once the PWM IC start working, one the winding will be the supplying the voltage to the IC to keep it running. If the DC output side detect short cirsuits (drawing too much current) it will go into shutdown, you need to find out if the inverter circuits has short circuits. The 5vdc and the 12~18vdc power supply will be running the minute you plug it in, you can solder in a 12v bulb at the DC output that feeds the inverter circuits (you can solder it directly on the DC filter caps for the 12~18 VDC filter caps of the inverter circuits). See application notes how this IC is used. http://www.fairchildsemi.com/an/AN/AN-4129.pdf
The transformers are the 2 rectangular parts on the power board. If you go to our web site at: www.ccl-la.com we have a step by step repair guide to the Dell E173FPc monitor. If you open your monitor and look at the power board the back lights plug onto the board by the transformers ( the cables will be either pink/white or blue/white ) If you need any more information about repairing this unit just contact us through our web site.
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Hi there. Have you checked the powersource? Is the transformer working? Is the cable from the wall socket to the transformer broken? Is the cable from the transformer to the screen broken? Is the plug on the same cable damaged? Is the transformer the right size( voltage) Is the polarity on the screen plug right? Is the screen actually working? Iceman.
Honestly the power supply uses capacitors to build up the high voltages required to run the monitor display. In all high probability one or more of these are failing and they are discharging to rapidly not allowing enough voltage to the display transformer. It won't come on until voltage is high enough. You're gonna need a new monitor soon, If you can obtain a schematic you can check the voltage drops across the output transformer and replace the faulty component but it is very time consuming and hard to get board components these days for digital supply boards in the states. Sorry I could not be of more assistance.
Yes, the connector next to the speaker connector is for the power adapter. It's different from the speaker plug so you can't put it in the wrong place. Hopefully you got the right power adapter with the monitor.
Here's the page at HP's site where you can download the User's Guide for this monitor. Hope this helps.
Sounds like an inverter problem. If the power supply is internal replace the capacitors coming out of the voltage regulators. These are usually 1000mf and/or 470mf. If that doesn't do the trick look up the numbers on the 8-pin chips that drive the secondary transformers on the inverter to see if they are getting the right voltages. Good Luck!