Dim Bulb Tester

[tom66]

Re: Dim Bulb Tester

You're literally just wiring it in series with Vs, so cut the Vs wire on the harness and put it in series between the cut wires. Make sure to break all Vs wires, no point having any connected to bypass the bulb.

[budwich]

Re: Dim Bulb Tester

I think in most cases, your want lower wattage bulbs as opposed to higher wattage. Something like two 40 watts in series would be good as the higher resistance will keep the current down and likely save components. Chandelier bulbs at 25 watts would be even better.

[tom66]

Re: Dim Bulb Tester

I think in most cases, your want lower wattage bulbs as opposed to higher wattage. Something like two 40 watts in series would be good as the higher resistance will keep the current down and likely save components. Chandelier bulbs at 25 watts would be even better.

More or less true, but it's also important that the bulb is big enough to allow the board to be tested. A 60 or 100W bulb is reasonable, as it allows enough current to drive the panel from the Z-sus, if only weakly with a maldischarged image, but still it shows partial functionality.

[tech2014]

Re: Dim Bulb Tester

thanks for the info. So whats the easiest way to connect 2 bulbs in series? Less wires the better.

[tech2014]

Re: Dim Bulb Tester

I found this on eBay. Its a 200W 230V bulb. Will this work to test the VS?

http://www.ebay.ca/itm/6-Osram-200-W...sAAOSwu4BVoDW0

[budwich]

Re: Dim Bulb Tester

thanks for the info. So whats the easiest way to connect 2 bulbs in series? Less wires the better.

go to your local home depot, get two sockets and join the wires for a series connection, screw in the two bulbs and your done... probably for a total of $10.

[budm]

Re: Dim Bulb Tester

I will go with two lamps in series so you can easily use two lamps with the same Wattage, I.E two 100W, or when working on lower power units then you can use two 75W, etc.

[tech2014]

Re: Dim Bulb Tester

ok. This may seem like a stupid question, but how do I connect them in series correctly. Using google I see contradictory info. There is the hot(black wire) ,white(neutral) and ground(green) for polarized plug. How do I connect these wires to the second bulb?

[tom66]

Re: Dim Bulb Tester

ok. This may seem like a stupid question, but how do I connect them in series correctly. Using google I see contradictory info. There is the hot(black wire) ,white(neutral) and ground(green) for polarized plug. How do I connect these wires to the second bulb?

In the same way as you'd make any series circuit...by wiring neutral of one bulb to live of the other. So the bulbs are electrically "one after another" so to speak.

[tech2014]

Re: Dim Bulb Tester

In the same way as you'd make any series circuit...by wiring neutral of one bulb to live of the other. So the bulbs are electrically "one after another" so to speak.

Thats what I thought. Thanks for the reply tom.

So when I want to test the VS line, I just connect the neutral and hot wire into the VS line after removing the VS from the connector. I already have a connector with the VS line wires cut, so I can connect the bulb wires in.

[tom66]

Re: Dim Bulb Tester

Yep, but all other wires (GND, 5V, 15V, Va, etc.) need to be connected as usual.

[tech2014]

Re: Dim Bulb Tester

OK I am now ready to test the TV with my dim build tester. The XSUS board keeps shorting out and blowing a bunch of IGBTs, the VS line shorts out. To prevent blowing the parts again after repair, I am doing the following:

I cut the VS wires going from the YSUS to the XSUS. Now I want to put my two 70W bulbs in series with the VS line. I will connect wires from both bulbs into the connector with the VS lines cut. One bulb wire will be on VS line from power supply and the other will be connected to the connector for VS line on XSUS board.
Can someone look and tell me if I am doing this right?

See pics below.

[stj]

Re: Dim Bulb Tester

that's wrong.
wire them like christmas-tree lights.

[source]------------[lamp1]----[lamp2]-------------[destination]

[tech2014]

Re: Dim Bulb Tester

So the bulbs are connected wrong? I have the neutral of the first bulb going to the live of the second bulb, is that not in series?

Can someone explain to me what to do? I have never done this before.

[martino]

Re: Dim Bulb Tester

That looks like a Samsung pn51? If you get in a pickle and need board I believe I got a few sets of boards for these.