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Resistor values Hi, I wondered if you could help in identifying the values of the 2 surface mounted resistors, RV2 and RV3 by the DC socket on a Dell Latitude D510 motherboard, please? Thank you, Frank.

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Surface resistor


Resistors are not sold by voltage, but by their resistance and the max power they can dissipate. The value is usually printed on it as a three digit number (e.g. 473 means 47000 ohms). If you cannot read anything - you said its blown - youre out of luck. You could find someone else with the same PC and look at his motherboard.
Anyway - if a resistor is blown, there is a reason for it. It is not a bomb, so it wont blow on itself. Probably something in your PC is defective, which causes the resistor to blow.

Apr 13, 2014 | ASUS Eee PC 1005HA-PU1X-BK Netbook

1 Answer

I need the value for rv1 on a hannstar J mv-1 94v-0 0523 motherboard


If you don't mess up with your laptop then go to your nearest laptop repairer where you find perfect solution without any harm for your computer.

Mar 13, 2014 | PC Laptops

1 Answer

Help ID this surface mount componant


That's a burnt resistor. I would guess that is not the only part that is bad. You have a short on the board. There is no way to read the value anymore. I'm afraid you are looking at a new motherboard. For more information, please visit my website at audioserviceclinic.com. Thank you.

Dec 24, 2013 | ASUS G1SN-A1 Gaming Notebook PC

1 Answer

Dell lattitude cpx charging pin and - TERMINALS


What? Is it time to wake up?

Oh yeah, Dell Latitude CPX,

http://www.amazon.com/Dell-Latitude-Notebook-650-MHz-Pentium/dp/B00005UJYF

AC adapter example for above,

http://www.prontocharger.com/ProductDetails.asp?ProductCode=d1161

DC Power Jack example,

http://www.all-power-jack.com/Dell/Dell-Latitude-CPx.html

I see the dilemma. The plug from the AC adapter has 3 socket holes, and the DC Power Jack has 3 prongs.

DC electricity has a Positive connection, and a Negative connection.

To find out which socket holes are for Positive, and Negative, let's look again at the DC Power Jack,

http://www.all-power-jack.com/Dell/Dell-Latitude-CPx.html

The Top view shows the jack upside down, and turned around. (In relation to how it mounts on the motherboard )

The bottom left view shows the jack primarily how it sits, (Mounted), on the motherboard.

The bottom right view shows the jack turned over, laying on it's front.
Also laying over to it's right side.

Note the three prongs. (Flat bladed pins )
The one in the middle is Positive.
The two outer prongs are Negative.

Looking at the bottom Left view, the Top prong is Positive, and the two bottom prongs are Negative.

Match it up to the plug on the AC adapter cable.

Going to test the Voltage coming out? (20 Volts)
The red Positive probe lead goes into the top socket hole, in the plug.
The black Negative lead goes in either bottom socket hole.

What if I'm wrong?

A Digital multimeter will just show a negative value. -20
An Analog multimeter's needle will go down towards the 0, instead of towards 20 Volts. (DC)

Just switch the probe leads around.

For additional questions, or if I am way off base, post back in a Comment.

Regards,
joecoolvette

Apr 29, 2012 | Dell PC Laptops

1 Answer

Dead set


Try taking out battery and plug in power. If it works, battery is faulty.
If not, try taking out your hard disk plug in power, if it works, hard disk is faulty.Try taking out memory card, if there's a sound, memory card faulty. If no sound, it's your motherboard that is causing the error.

Note: If machine is under warranty no need to pay for the repairs.

Apr 29, 2009 | Dell Latitude D510 Notebook

2 Answers

Motherboard resistors RV2 and RV3


RV1, RV2, and RV3 are capacitors. They're actually dark green in color because they're made primarily for automotive applications. If you remove one and measure it with a capacitance meter you can find the value. On a 600M/D600 I believe they're 150pF, but on other boards they may be 100pF. Digikey part numbers for them are 490-4962-1-ND for the 100pF, or 490-4767-1-ND for the 150pF. Good luck!

Dec 06, 2008 | Dell Latitude D510 Notebook

1 Answer

Battery not charging. Power Adapter ok


DC jack issue usually.

Or a bad repair- many techs not skilled enough will wind up losing RV1,RV2 or RV3 MOV. this is so small that I had documented it on my site. The chip has no values printed on them, and are hard to find "Close-Up"

But fear not, most of the times it is simply a DC jack replacement. They are about $8 on ebay. And only a skilled tech should replace it.

How they fail?
It is a circular tri-axial ring inside, the leaf type contacts become fatigued and no longer pick up power. Or the center contacts become fatigued.

OR the jack left the factory with insufficient solder and repeated use caused it to crack.

======================
Don't forget to rate responses

Jul 04, 2008 | Dell Latitude D600 Notebook

1 Answer

VAIO VGN-A150 motherboard


That would be verry difficult to find. A service diagram of this model is imposible to be found, at least over the internet. However here are some tips you may find usefull. If you have acces to a multimeter or at least a current-voltage measuring device, try to turn on the laptop and measure the voltage on those pins where the resistor is missing. If you find something smaller then 10 volts you can try the following method.
Buy a 1 mega ohm resistor along with other smaller values like 100kilo ohm, 10kilo ohm, 1 kilo ohm, 100ohms, 10 ohms. These resistors don't need to be smd tipe, regular ones are good at least for this testing stage as long as you can solder them on the motherboard. Begin by using the larger values (1 mega ohm) and check to see if the problem is solved or something is different. Then decrease step by step checking each time how the problem evolves. When you reach to 1 kilo ohm, don't solder the resistence like before, instead mount an amper-meter in series (not parralel !!! ) with the resistor. Check to see how much current is passing through the resistor. If you find more then 100mA stop here, because by following this metod down to smaller values of that resistor you may damage the board if the current exceeds certain levels.
Try this simple tests and please notify my of the results. You may ask further questions if you need more details on this matter.

Jan 21, 2008 | Sony VAIO VGN-A150 Notebook

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